CN100490484C - Voice communications system - Google Patents

Voice communications system Download PDF

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Publication number
CN100490484C
CN100490484C CN 200380107488 CN200380107488A CN100490484C CN 100490484 C CN100490484 C CN 100490484C CN 200380107488 CN200380107488 CN 200380107488 CN 200380107488 A CN200380107488 A CN 200380107488A CN 100490484 C CN100490484 C CN 100490484C
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China
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telephone set
network
circuit
signal
comprised
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CN1732677A (en
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薄叶伸司
久保木浩
青柳弘美
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Oki Electric Industry Co Ltd
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Oki Electric Industry Co Ltd
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Abstract

Voice communications apparatus is connected to a general subscriber telephone set or a broadband telephone set, to communicate over the public switched telephone network. The apparatus includes a filter converting signals such as to satisfy signal conditions prescribed for the telephone network. The apparatus also includes a terminal class determiner for determining the class of the telephone set connected, and a circuit for changing at least the sampling frequency at which the analog signals from the telephone set are sampled. This establishes high quality in broadband voice communications. The terminal class determiner may automatically determine the class of the telephone set at any timing of a call sequence by detecting a band component of the signals from the telephone set, a predetermined frequency of a signal intermittently transmitted from the telephone set or the characteristics of the telephone set.

Description

Voice communication system
Technical field
What the present invention relates to is the voice communication system that is suitable for broadband connections, especially can carry out (IP) network or the gateway device of the communication of public switch telephone network (PSTN) from the telephone set to the Internet protocol selectively.
Background technology
Recently, because IP-based voice communication (VoIP) technology can be assembled into voice signal the IP grouping, thereby voice and data are integrated mutually with generation lower network or communications cost, so this technology has obtained being extensive use of.Yet on the other hand, traditional public switch telephone network (PSTN) focuses on the emission voice signal, and its transmission band is confined to 3.1kHz or lower.This network design framework can be limited in 3.1kHz with unit channel bandwidth, and digital transmission network then has the basic transmission rate of 64Kb/s, and its sampling rate is 8KHz.This means that terminal and network all can handle the signal that exceeds 3.1kHz as superfluous signal.
On the other hand, because recent tendency is tended to broadband service, so the transmission equipment on the network has been designed to tackle broadband connections.In addition, even central office line also adapts with broadband network by asymmetric digital center exchange line road (ADSL) or optical transmission line, so that can realize broadband voice transmission end to end.As a result, high-quality voice communications becomes one and presses for.
Yet gateway device that those that begin recently to popularize and voip technology are compatible mutually and subsets only focus on reply VoIP, but can't realize utilizing the high-quality voice communications of broadband network advantage.Though proposed can broadening voice signal frequency band broadband telephone set, if this telephone set is linked to each other with public switch telephone network, will violate its technical specification so.
Be connected in the application of broadband transmission channel via gateway unit at the conventional subsets that will be exclusively used in public switch telephone network, if the co-channel signal that this class of voice signal is transmitted in order to tackle broadband connections carries out conversion of signals, will be difficult to provide enough good voice quality because of the distinctive character of conventional subsets so between conventional subsets and gateway unit.
In addition, in design certain electric phone, do not determine telephone set is connected to public switch telephone network or IP network, do not determine that in addition it still is to be connected to network via gateway unit that telephone set is directly connected to network yet.Usually, when interconnecting, be used to tackle the telephone set of high-quality or wideband transmit even can hamper appropriate signal transmit with this type systematic of gateway unit.Though can consider the telephone set characteristic is proofreaied and correct, when being installed to telephone set in the system, do not determine to use which condition to proofread and correct, in addition, even proofread and correct, telephone set can not realized its optimum performance yet.Compensate the telephone set characteristic though it is also conceivable that the function by the gateway unit that links to each other with telephone set, this can not fully compensate the telephone set characteristic that some gateway unit can't be understood, for example acoustic characteristic.
Wish to obtain a kind of system that utilizes the broadband network characteristic to realize the high quality broadband voice communication or can in the reply broadband technology, handle the voice communication on the public switch telephone network thus.
Summary of the invention
An object of the present invention is to provide and a kind ofly can realize the high quality broadband voice communication and can tackle voice communication system via the voice communication of public switch telephone network, and a kind of telephone set that is used for this system.
According to the present invention, voice communication apparatus comprise can with any one port that links to each other in conventional subsets and the broadband telephone set.This equipment is presented in the communicating by letter between link to each other telephone set and the public switch telephone network.And this equipment has comprised and has been used for changing aiming at the signal that telephone set transmits and receives, so that signal satisfies the filter of the signal condition of defined in the public switch telephone network.
Preferably, comprise the circuit of the telephone set classification that is used for determine linking to each other, and in to process, change the circuit of sample frequency at least according to the telephone set classification of judging from the analog signal sampling of telephone set according to voice communication apparatus of the present invention.
In one aspect of the invention, voice communication apparatus can comprise and be used on any one network of broadband network and public switch telephone network setting up selectively the telephone circuit of calling out, and those are aimed at the signal that telephone circuit transmits and receives changes so that signal satisfies the filter of the signal condition of defined in the public switch telephone network.
In another aspect of the present invention, voice communication apparatus can comprise the telephone circuit that is used for setting up selectively calling on any one network of broadband network and public switch telephone network, be used for determining on which network of broadband network and public switch telephone network, to set up first circuit of calling out, and in to the process from the analog signal sampling of telephone circuit, the judgement of making according to first circuit changes the second circuit of sample frequency at least.
According to the present invention, according to the present invention and the telephone set that can link to each other with at least one the network in comprising public switch telephone network and broadband communication network comprise and be used for receiving the signal of determining at least one network type from network, and determine that this network is the decision circuit of which network in public switch telephone network and the broadband communication network, and the result who produces in response to decision circuit selects at least one selection circuit about the communication band of this network.
In addition, according to the present invention, voice communication system comprises any one in conventional subsets and the broadband telephone set, and voice communication apparatus will be presented in the communicating by letter between at least one network in the telephone set that comprised and public switch telephone network and the broadband communication network.Voice communication apparatus comprises the circuit that is used for sending to telephone set signal, by means of this signal, can determine at least a network type.Telephone set then comprises being used to receive sends signal so that judge that according to received signal described at least one network is the public switch telephone network or the circuit of broadband communication network, and selects one at least about the selector circuit of the communication band of this network in response to the result that decision circuit is made.
As selection, voice communication apparatus can also comprise first circuit that is used to judge the telephone set classification that is comprised, thereby can operate the second circuit that changes the co-channel signal attribute that transmits between telephone set that is comprised and voice communication apparatus in response to determined classification.
In addition, as selection, voice communication apparatus can also comprise first circuit that is used to determine the continuous telephone set classification that comprised, and be used to the telephone set that is comprised that the change order is provided, so that change second circuit with determined classification corresponding characteristic, wherein the telephone set that is comprised comprises and makes response to changing order, thereby changes the tertiary circuit of the co-channel signal attribute that transmits between voice communication apparatus and the telephone set that comprised.
In effective transmission band, the telephone set adaptation equipment that adapts to any one telephone set according to the present invention is mutually different, and this equipment has comprised and has been used for regularly coming to determine first circuit of the telephone set classification that adapted at calling sequence with certain.
Preferably, first circuit can comprise first circuit that is used for the signal band from the telephone set that is adapted to is divided into a plurality of sub-bands, be used for detecting the signal detector whether sub-band comprises effective signal component, and use the testing result of signal detector to determine the second circuit of the telephone set classification that adapted to.
In addition, preferably, first circuit can comprise and be used on preset frequency detecting the intermittently pattern detection device of the signal pattern of input, and pattern, the pattern content that is detected and the prearranged signals frequency of using the pattern detection device to detect are determined the second circuit of the telephone set classification that adapted to.
As selection, first circuit can also comprise voltage between the circuit of the impedance of the telephone set that is used for adapting to relating to, the telephone set that adapted to and any measuring circuit of measuring of the blocking current of the telephone set that adapted to, and uses the measurement result of measuring circuit to determine the second circuit of the telephone set classification that adapted to.
Telephone set has comprised the pattern maker that is used to produce first signal with pattern at intermittence, pattern and intermittently produce the frequency signal maker of secondary signal at intermittence in response to first signal with preset frequency, and the adder circuit that is used on the voice signal channel adding secondary signal, wherein pattern maker, frequency maker and adder circuit all are the predefined phase work in calling sequence.
As selection, telephone set can also comprise a pair of can linking to each other with telephone set adaptation equipment, so that adapt to the circuit of described telephone set, and the telephone set impedance that the slave unit place is observed, the circuit that links to each other with equipment be to any one circuit operated in the blocking current of voltage and telephone set between last circuit, and wherein said circuit is the predefined phase work in calling sequence.
Description of drawings
Investigate detailed description hereinafter in conjunction with the drawings, can more clearly understand purpose of the present invention and feature, wherein:
Fig. 1 is the schematic block diagram according to the preferred embodiment of voice communication system of the present invention;
Fig. 2 is the schematic block diagram that shows the one exemplary embodiment of the telephone set that uses in the embodiment shown in fig. 1;
Fig. 3 is the schematic block diagram that shows the one exemplary embodiment that is applicable to terminal class identifying unit embodiment illustrated in fig. 1;
Fig. 4 A, 4B and 4C describe is the bandpass characteristics of the band separation filter that comprises in the terminal class identifying unit shown in Figure 3;
What Fig. 5 described is the decision logic of the terminal class identifying unit among Fig. 3 embodiment;
Fig. 6 is similar to Fig. 3, and it is the schematic block diagram that shows the terminal class identifying unit in the alternative embodiment of the present invention;
Fig. 7 is the functional block diagram that shows the major part of the telephone set in another alternative embodiment of the present invention;
Fig. 8 A, 8B and 8C are the sequential charts that is presented at the waveform of different piece appearance embodiment illustrated in fig. 7;
Fig. 9 A～9D is the sequential chart that is presented at the waveform that the different piece of the telephone set of another alternative embodiment occurs;
Figure 10 is the schematic block diagram of the terminal class identifying unit of exemplary another alternative embodiment of demonstration the present invention;
Figure 11 and 12 is schematic block diagram of the major part of the telephone set in another alternative embodiment of exemplary demonstration; And
Figure 13 has shown another embodiment according to telephone set of the present invention in exemplary block diagram.
Embodiment
Come the preferred embodiments of the present invention are described in detail referring now to accompanying drawing.With reference to figure 1, the voice communication system 1 of present embodiment comprises respectively and subsets 2A and 2B interconnection, and with gateway (GW) the unit 3A and the 3B of IP network 4 these class broadband networks and public switch telephone network (PSTN) 5 interconnection.Thus, telephone set 2A and 2B can carry out voice communication via IP network 4 or public switch telephone network 5.Usually, in IP network 4 and public switch telephone network 5, hold a large amount of gateway units and telephone set.Yet describe concisely for making, in Fig. 1, only shown two networkings unit, pass and telephone set.
If network comes work as voice communication system, one of them telephone set so, for example 2B can be the wideband telephony terminating machine of compatible VoIP.In this case, telephone set 2B not only interconnects with gateway unit 3B, and is directly connected to IP network 4.In addition, this telephone set also can be conventional subsets, and in this case, telephone set not only can interconnect with gateway unit 3B, but also can be directly connected to public switch telephone network 5.
In the present embodiment, another telephone set 2A that links to each other with gateway unit 3A can be broadband telephone set or conventional subsets.And in the present embodiment, this telephone set is connected to gateway unit 3A by analog line 60 and via connector 61, and wherein said connector 61 is normally dismountable.
Gateway unit 3A serves as the telephone set connection device, and for present embodiment, this unit interconnects with IP network 4 or public switch telephone network 5 selectively, so that communicate by letter with the telephone set 2A foundation that is attached thereto.
Gateway unit 3A comprise with shown in mode by-pass switch 11, filter cell 12, PSTN interface 13, central office line's circuit 14, codec unit 15, control and the VoIP processor 16 and the IP network interface 17 that interconnect.Can take the mode similar to come h.323-configured gateway unit 3B here to gateway unit 3A.And will no longer describe those in subsequent descriptions does not have the part or the assembly of direct correlation with understanding process of the present invention, and can not describe it in the accompanying drawings yet.
By-pass switch 11 links to each other with the central office line 60 of telephone set 2A.Shown in control line 74, when telephone set 2A communicated by letter via public switch telephone network 5, as described later, by-pass switch can switch under the control of control and VoIP processor 16, so that telephone set 2A is connected to filter cell 12.In stand-by state, by-pass switch 11 is adapted to filter cell 12 and links to each other, and as selection, also it can be adapted to and link to each other with filter cell 12.
Filter cell 12 links to each other with switch 11, and in an exemplary embodiment, no matter telephone set 2A is broadband telephone set or conventional subsets, and it all is adapted to the voice band that the call signal frequency band limits that will be referred to public switch telephone network 5 becomes public switch telephone network 5 defineds.If telephone set 2A is conventional subsets, the call signal from telephone set 2A has been confined to voice band so, so the importance of filter cell 12 will be very low.Yet if telephone set 2A is a broadband telephone set, filter cell will effectively be worked so.As selecting, also can be configured in addition, thereby only under telephone set 2A is the situation of wide-band type, just carry out work, and be line signal not to be handled under the situation of conventional subsets at telephone set 2A filter cell 12.Can be configured filter cell 12 in addition, so that the call signal from public switch telephone network 5 to telephone set 2A is carried out filtering.
PSTN interface 13 links to each other with central office line 62, and wherein central office line 62 links to each other with public switch telephone network 5, so that public switch telephone network 5 is connected with gateway unit 3A.If telephone set 2A is a wide-band type, PSTN interface 13 also can play the effect that the regulation of impelling line voltage distribution and electric current and public switch telephone network 5 is complementary so.
Line circuit 14 links to each other with circuit 60 from telephone set 2A, so that telephone set 2A and gateway unit 3A are connected.Shown in connecting line 64, here can also be configured in addition, so that directly be the called number of controlling and VoIP processor 16 provides the off-hook detection signal and receives from telephone set 3A line circuit 14.In subsequent descriptions, signal is to represent with the reference number of the specific connection that signal occurs.
Codec unit 15 has function switching signal.More particularly, coding-decoding circuit 15 is adapted to via connecting line 66 and comes receipt of call control signal or this class of voice signal to be derived from the signal of line circuit 14, so that these conversion of signals are become digital signal corresponding, perhaps come this class of receipt of call control signal to be derived from the signal of public switch telephone network 5, so that these conversion of signals are become digital signal corresponding via PSTN interface 13.In addition, codec unit 15 also receives call control signals or the voice signal that relates to telephone set 2A via connecting line 68 from control and VoIP processor 16 theres, so that these conversion of signals are become related analog signal, these signals will be delivered to line circuit 14 then.Codec unit 15 also converts this class of call control signals to corresponding analog signal from the digital signal that control and VoIP processor 16 send to public switch telephone network 5, and these analog signals then transfer to send to PSTN interface 13 via connecting line 70.
In the present embodiment, codec unit 15 also has when telephone set 2A communicates via IP network 4, the function that changes sample frequency and/or message transmission rate according to kind or the terminal class of the telephone set 2A in the circuit.
For example, when telephone set 2A was conventional subsets, codec unit 15 was used 8kHz as its sample frequency.When telephone set 2A was broadband telephone set, it can with 7kHz or more low frequency be as voice band, and codec unit then uses 16kHz as its sample frequency.If telephone set 2A is wide-band type and has 20kHz or lower voice band that codec unit is used 44kHz as its sample frequency so.When gateway unit 3A has the treatment system that this class of personal computer links to each other via the LAN circuit, can carry out adaptive to codec unit 15, so that use 44kHz, and set a frequency among 8kHz or the 16kHz selectively according to the classification of telephone set 2A or kind as its sample frequency.
For example, what control and VoIP processor 16 comprised is single-chip processor, and it is adapted to controls the integrated operation of gateway unit 3A, and carries out VoIP and handle, for example assembling or decomposition IP grouping.As mentioned above, in the present embodiment, codec unit 15 main responsible mould-number (A/D) conversion or number-Mo (D/A) conversions.Control and 16 of VoIP processors are responsible for carrying out coding before assembling IP grouping, and carry out decoding after decomposing the IP grouping.
IP interface unit 17 links to each other with IP network 4 via circuit 72, so that butt joint with it.
For the terminal class of definite telephone set 2A that links to each other with gateway unit 3A, determine that just telephone set 2A is broadband or conventional subsets, present embodiment has used following method.These result of determination are used to switch the sample frequency in the codec unit 15, and determine whether to carry out filtering in filter cell 12.This judgement can start gateway unit 3A, implements when for example powering up for it, also can implement when off-hook phone makes a call.
As exemplary method, gateway unit 3A can have two connectors 61, so that be connected respectively to broadband telephone set and conventional subsets.In this case, control and VoIP processor 16 are adapted to telephone set 2A with which connector wherein linked to each other and detect, so that classification or the type of definite telephone set 2A.As selection, the reciprocating type pin that does not show here can be provided for the single connector 61 that is connected to telephone set 2A, and provide the plug that does not show for connecting line 60 from telephone set 2A, so that allow to regain the pin that is used for the broadband telephone set that is coupled, and do not regain the pin that is used for the conventional subsets that are coupled.Whether control and 16 of VoIP processors are regained pin is made response, thereby which plug what detect insertion connector 61 is, and then the classification of definite telephone set 2A.
Method as an alternative can be the manual operable switch of broadband or conventional subsets for gateway unit 3A provides this class of dual in line switch to be used for the telephone set 2A that indicating circuit connects also.Control and 16 classifications of determining telephone set 2A according to the connection status of hand switch of VoIP processor.
As another kind replacement method, can also provide measuring unit for line circuit 14, so that the input physical attribute on the connecting line 60 that is connected to telephone set 2A is measured, then, control and VoIP processor 16 will be checked measured value according to internal storage information, so that check the classification of telephone set 2A.The physical attribute that can obtain comprises voltage between standby voltage, circuit, voltage to earth, speech current, off-hook pitch frequency or pattern by measuring, button (PB) signal that receives or the dial impulse that receives (DP) signal.
In addition can be for line circuit 14 provides measuring unit, so that the output physical attribute of measurement from line circuit 14 to telephone set 2A.Can carry out control and VoIP processor 16 in this case adaptive so that adjust the change of measured value or response aspect according to internal storage information, thus the classification of inspection telephone set 2A.For example, available output physical attribute can be ring output voltage, ring output frequency, Ring Mode, the PB signal of sending, the transmission tone that is used to identify, the high-frequency range tone signal of sending or emission/receiving modem signal.Generally speaking, the physical characteristic that can use those in the reaction between broadband and the conventional subsets, to be distinguished here.According to the type of physical attribute, be necessary to set a broadband telephone set, so that make the reaction that is different from conventional subsets.Next will discuss in detail the measurement of these physical attributes.
In the decision method of above-mentioned telephone set classification or terminal class, wherein can use these physical attributes to make up and carry out judgement.The combination of this a plurality of physical attributes can have the input and output physical attribute of connecting line 60.
Above-mentioned decision method to be measuring the input physical attribute, they at the control and the VoIP processor 16 of classification that is suitable for independently judging telephone set 2A.As selection, can provide the database of information of having stored the corresponding relation between physical attribute measured value and the telephone set classification on the server 6 of IP network 4, then, control and VoIP processor 16 are adapted to server 6 provides a measured value, and server transfers the classification information of respective electrical phone 2A is offered control and VoIP processor 16.Different with the situation institute of the classification information of obtaining telephone set 2A from server 6, for changing the setting data of the attribute in this class codec unit 15 of sample frequency, itself also can obtain from server 6.Under latter event, kind or terminal class judgement are all carried out by gateway unit 3A.
In operation, the calling party takes telephone set 2A, so that dial the telephone number of called phone machine, here, described called phone machine is the telephone set 2B that has utilized public switch telephone network 5, and the PB signal of indication called number is sent and detected by the PB signal detector the line circuit 14 that does not show from telephone set 2A.Then, control and VoIP processor 16 judge this be one need with public switch telephone network 5 continuous being connected.
At this moment, as shown, control can be set by-pass switch 11 for link to each other with filter cell 12 state with VoIP processor 16.More particularly, if by-pass switch 11 is in the stand-by state that links to each other with filter cell 12, it can keep this connection status so.If by-pass switch 11 is in the stand-by state that does not link to each other with filter cell 12, it can switch to the state that links to each other with filter cell so.At this moment, control and VoIP processor 16 will be forbidden its functional unit that communicates with IP network 4 of being used for.
If filter cell 12 only is adapted under telephone set 2A is the situation of wide-band type just carries out work, its can be according to adopting effective operating state by the resulting The above results of terminal class of determining telephone set 2A so.In this case, when telephone set 2A is broadband telephone set, the line signal that therefrom provides is received via by-pass switch 11 by filter cell 12, and this signal will be subjected to the frequency band limits that public switch telephone network 5 is allowed, and will send to public switch telephone network 5 via PSTN interface 13 thus.
When telephone set 2A is conventional subsets, the line signal that therefrom provides will pass through by-pass switch 11, therefore this signal only transmits via filter cell 12, perhaps be limited on the frequency band of being considered for public switch telephone network 5, so that be sent to public switch telephone network 5 via PSTN interface 13 by filter cell 12.
The voice signal that PSTN interface 13 receives from public switch telephone network 5, these signals carry out filtering by filter cell 12, and send to telephone set 2A via by-pass switch 11.
Now, when the calling party called out the called phone machine 2B that uses IP network 4, he or she can take telephone set 2A, so that dial the telephone number of called phone machine 2B.The PB signal that is used to represent called number then transmits and is detected by the PB signal detector of line circuit 14 from telephone set 2A.Control is judged into a calling on the IP network 4 with VoIP processor 16 with it.At this moment, control and VoIP processor 16 can respond the result of determination of the terminal class of telephone set 2A, just responding telephone set 2A is the conventional subsets or the result of determination of broadband telephone set, so that be that codec unit 15 is set sample frequency or message transmission rate.Simultaneously, notconnect state be set or be remained on to control and VoIP processor 16 also can with by-pass switch 11.
In this state, the voice signal that telephone set 2A sends is provided to codec unit 15 via line circuit 14, and then, this unit converts voice signal to digital signal corresponding with the sample frequency that sets.The digital signal that finally obtains is assembled into the IP grouping by control and VoIP processor 16, and then, this IP grouping sends to IP network 4 via IP interface 17.
The voice signal that receives from IP network 4 arrives with the form that IP divides into groups, and then, on the sample frequency that will set in the classification according to telephone set 2A in codec unit 15 it is handled.
When gateway unit 3A receives calling from public switch telephone network 5, PSTN interface 13 will produce a call control signals to codec unit 15 for this reason, on 15 sample frequencys of transferring in stand-by state of codec unit this conversion of signals is become digital signal corresponding.Control and 16 pairs of callings from public switch telephone network 5 of VoIP processor are distinguished.Then, control and VoIP processor 16 will be carried out with aforesaid and will call out the similar control operation of process that sends to IP network 4 from telephone set 2A.
Control and 16 pairs of IP interfaces 17 of VoIP processor receive signal and make response, thereby pick out the calling of automatic network 4, and execution and aforesaidly will call out the similar control operation of process that sends to IP network 4 from telephone set 2A.
In the above-described embodiments, if the telephone set 2A that links to each other with gateway unit 3A is a broadband telephone set, filter cell 12 can be carried out bandwidth constraints in the process of accessing public switched telephone network 5 so.Make the technical conditions or the needs that can satisfy public switch telephone network 5 from the signal of gateway unit 3A transmission thus.So, even broadband telephone set 2A does not satisfy the other technologies standard, signal also can meet the specification by PSTN interface 13.
In addition, in the process that inserts IP network 4, the sample frequency of codec unit 15 will be controlled, so that can change according to the type of the telephone set 2A that connects in the circuit.So then can on IP network 4, set up the almost all available communication of the entrained information of voice signal, thereby improve communication quality.
Gateway unit 3A has the kind of determining the telephone set 2A that connects in the associated circuit or the function of terminal class, the actual thus above-mentioned functions that represented.
With reference to figure 2, the embodiment of the broadband telephone set 2A that mainly links to each other with gateway unit 3A will be described for example now.The broadband telephone set 20 of present embodiment can be directly coupled to IP network 4 or public switch telephone network 5.Broadband telephone set 20 comprise with shown in mode microphone 21, transmitter 22, user or the central office line's interface unit 23, receiver 24, earphone 25 and the controller 26 that interconnect.
Transmitter 22 has variable or optional voice band, and can comprise the variable filter that does not show.Transmitter 22 is adapted to has the voice band that can switch between the narrow band mode of the broadband mode of the audio band of 200kHz, 7.1kHz and 3.1kHz.Broadband mode then is the standby mode of filter.
Receiver 24 is the receiving circuits with variable frequency acceptance band, and wherein this frequency band can switch between audio band pattern, broadband mode and narrow band mode.And broadband mode is the standby mode of receiver 24.
Subscriber line interface 23 links to each other with user or central office line 60, and comprises not the detecting unit that shows, is used to detect from network terminal and the mode switch triggering signal that transmits via subscribers feeder 60.In case detector detects triggering signal, then subscriber line interface 23 can be sent to controller 26 with testing result 28.
Rely on this mode switch triggering signal that can obtain from network, can be respectively fall into the signal of 20kHz～7.1kHz or its signal pattern, frequency here and fall into the signal of 7.1kHz～3.1kHz or its signal pattern or frequency and fall into 3.1kHz and come regulation audio mode, broadband mode or narrow band mode to signal or its signal pattern of 0kHz according to frequency.In addition, use this triggering signal even can also tackle the situation that broadband telephone set 20 directly interconnects with IP network 4 or public switch telephone network 5.
Can use the signal that has different attribute between public switch telephone network 5 and the IP network 4 as the mode switch triggering signal that can obtain from network here, wherein for instance, this signal can be voltage, voltage to earth, ringing voltage, PB signal or a modem signal between circuit in the calling procedure.
Controller 26 is adapted to be controlled broadband telephone set 20 comprehensively, it not only carries out the control that subsets need usually, but also the result that detector functions detected by line interface unit 23 is made response, thereby the emission band of transmitter 22 and the frequency acceptance band of telephone receiver 24 are carried out variable control.
Can be configured gateway unit 3A in addition, make it to self producing above-mentioned mode switching signal and signal that output produced.As selection, also can directly the mode switch triggering signal from public switch telephone network 5 or IP network 4 be sent to broadband telephone set 20.For instance, if the control of Fig. 1 and VoIP processor 16 be can not determine the classification of telephone set 2A, so gateway unit 3A is carried out adaptively,, thereby the signal that is produced is outputed to subscribers feeder 60 so that come to be that by for example line circuit 14 himself produces the mode switch triggering signal.
As mentioned above, the broadband telephone set 20 of present embodiment is controlled emission band and frequency acceptance band according to the network type that is used to transmit, and can not rely on the high-quality voice communication of realization under the situation of network type thus.
In the above-described embodiments gateway unit 3A is disposed, no matter whether signal is through filtering thus, and sample frequency all can be set in variable mode according to the type of the telephone set 2A that connects in the circuit in this unit.Yet institute is different with this structure of use, and here the co-channel signal that system is adapted to transmitting between gateway unit and the telephone set is changed.For instance, can change multifrequency nature or attribute here, for example voltage or voltage to earth between PB voltage of signals or pattern, bell signal, tone signal or modem signal, circuit.In addition, as long as providing maker equipment to produce here is exclusively used in kind of telephone set or classification, be that bell signal, tone signal or the modem signal of terminal class is just enough.In addition, comprise in the application of Echo Canceller at gateway unit, when beginning to call out, the initial coefficients of self adaptation operation is carried out adaptive according to the telephone set classification.
Above-mentioned these can attribute or physical attribute with telephone set kind or terminal class generation adaptive change in, delta data can be kept in the database of the server 6 on the IP network 4, and gateway unit 3A can provide the telephone set classification for server 6, so that receive to change, and then set described variation for variable element.
In the above-described embodiments, the characteristic or the attribute that can change according to the mode switch triggering signal of obtaining from network terminal of those in the broadband telephone set 20 is voice transmission and/or receiving feature.As selection, here can also carry out system adaptive, thereby only can change the voice transfer characteristic, and other characteristics or physical quantity also can be variable.Can carry out adaptively in addition to system, so that other characteristics also can change, wherein for instance, these characteristics comprise voltage or voltage to earth between the voltage, the circuit in the calling procedure of PB signal, tone signal or modem signal.
Subsets can be adapted to makes response to the change order from the gateway unit end, thereby changes the characteristic of the co-channel signal that transmits between voice communication apparatus and the telephone set.
Such as will be described in detail, can also carry out adaptive to gateway unit 3A here, so that canned data comes the resulting measurement result of the measuring unit in the line circuit 14 is examined in contrast control and the VoIP processor 16, change order thereby obtain.
As selection, following system configuration is suitable for equally.For concrete telephone set classification, measurement is carried out at this class acoustic characteristic of loudness rating, the frequency characteristic of obtaining comprising the subscriber line interface unit 23 from the earphone 25 of telephone set 20, or the frequency characteristic of obtaining from microphone 21 towards the subscriber line interface unit 23 of telephone set 20.Should be noted that even fall into identical category, another telephone set that has different change command context with certain telephone set also still can be assigned in the different kind or terminal class.Wherein for instance, measurement can be carried out by the mass measurement functional unit.According to measured value, will register on the server 6 of IP network 4 by the conversion co-channel signal with the corresponding translation data of telephone set characteristic or such as signal handler the conversion command on such switching software.In addition, for instance, switching software can be realized with the form of five routine plans arranging on the menu.
Gateway unit 3A obtains translation data or switching software according to the determination information of for example measured value that this class is obtained by line circuit 14.Wherein for instance, switching software is applied to measured value here, so that obtain translation data.The translation data of obtaining thus, be that conversion command will be provided to telephone set 20, so that telephone set 20 changes the attribute of co-channel signals.
Method that also can applications similar changes the co-channel signal on the gateway unit 3A or the characteristic of other signals in addition.For example, in the application of IP network, the variation of the co-channel signal characteristic of telephone set 20 or gateway unit 3A can make the whole frequency band upper frequency characteristic that IP network allowed all become very smooth.
Also gateway unit 3A is disposed in the above-described embodiments, so that can be according to the classification of the telephone set 2A that is attached thereto and only set different qualities in variable mode.As selection, can also carry out adaptive to system here, so that can be through consultation and, so then can come different qualities is carried out variable setting based on two telephone set classifications obtaining thus from the classification information that corresponding gateway unit 3B or telephone set 2B obtain homologue or called phone machine 2B there.Wherein for instance, can estimate that the classification of worse telephone set comes different qualities is carried out variable setting based on one of them communication quality here.
The foregoing description at be the gateway unit that the present invention is suitable for.Yet, the present invention is not limited to this gateway unit, in fact, the present invention also can be applied to those special equipments in order to conventional subsets are linked to each other with IP network, or the special equipment in order to this class telephone set of wideband telephony terminal is linked to each other with public switch telephone network.
Gateway unit 3A is not limited to a unit with telephone set 2A physical separation.For example, gateway unit 3A can be used as optional feature and can link to each other with telephone set 2A, also can be embedded in telephone set 2A inside during fabrication.Wherein for instance, here can carry out gateway unit 3A adaptive so that introduce the corresponding circuit of circuit with subsets 2A.
Figure 13 is exemplary to have shown integrated broadband telephone set 400, comprising with the telephone circuit 402 of circuit 61 interconnection, wherein circuit 61 links to each other with line circuit 404, and line circuit 404 is the line circuit 14 that comprised corresponding to gateway unit 3A shown in Figure 1 of part then.More particularly, integrated subsets 400 have subsets 2A in embodiment illustrated in fig. 1 and the function of gateway unit 3A on the whole.These functional parts are centered on by shell, and wherein said shell and integrated telephone set all carry out symbol with same reference numbers 400 and represent.In the drawings, same parts is represented with same reference numbers, for simplicity, has removed unnecessary description here from.
402 of telephone circuits can carry out adaptive so that comprise the corresponding circuit of a part with transmitter 22, receiver 24 and controller 26, thus to Fig. 2 in broadband user's telephone set 20 have similar function.More particularly, telephone circuit 402 is adapted to set up selectively on IP network 4 or public switch telephone network 5 and calls out, and just initiates and/or receipt of call.Telephone circuit 402 has continuous hand-held set 406, and comprising the microphone and the earphone that do not show, described microphone is corresponding with microphone 21 and earphone 25 respectively with earphone.Line circuit 404 and telephone circuit 402 can be realized with digital circuit components.Very advantageously be that integrated subsets 400 are fit to the broadband call that those are only set up on IP network 4, or the calling of setting up on IP network 4 or public switch telephone network 5 selectively.
Thus, one exemplary embodiment is used the broadband voice transmission and has been realized high quality communication.In addition, this embodiment has used a system, and this system has used via the appropriate voice transfer of setting up of public switch telephone network broadband connections is provided.
Put it briefly, the gateway unit of some reply VoIP framework can provide conventional subsets and a broadband telephone set of using in public switch telephone network, the gateway unit of other replies VoIP framework then can provide a plurality of telephone sets, for example conventional subsets and broadband telephone set.This class gateway unit is adapted to according to the telephone set classification that self keeps and the other side's telephone set classification judges use IP network or public switch telephone network, so that carry out and the corresponding to processing of judging thus of network.
For example, at this moment the conventional subsets that hold in gateway unit will be proofreaied and correct the voice signal frequency characteristic of conventional subsets emission, so that send high-quality audio signals to IP network with when IP network links to each other.On the contrary, when the broadband telephone set that is adapted to was connected to IP network, the wideband speech signal that launch provided from broadband telephone set, no longer needed the above-mentioned calibration function that is used for the voice signal frequency characteristic that will launch thus.Under latter event, proofread and correct and further to worsen voice quality.Therefore, beneficially be provided for judging the function of the telephone set classification of interconnection with it for gateway unit.
Therefore, as before briefly pointing out like that, adapt to the example of equipment as telephone set, gateway unit 3A can comprise the kind that is used for definite telephone set 2A or the terminal class identifying unit of terminal class.The one exemplary embodiment that in Fig. 3, has shown the terminal class identifying unit 100 that offers gateway unit 3A.Wherein for instance, this terminal class identifying unit 100 can be offered the line circuit 14 of gateway unit 3A here.But this gateway unit is illustrative, is suitable for equipment of the present invention and also is not limited to gateway unit, but can be applied to the multiple equipment that needs to judge interconnection subsets classification.
The terminal class identifying unit 100 of present embodiment have judgement as telephone set 2A and with gateway unit interconnection be the frequency band subsets that are not higher than 3.4kHz, broadband telephone set that frequency band is not higher than 70kHz and frequency band be less than the function of which telephone set among the audio band telephone set of 20kHz.For this purpose, terminal class identifying unit 100 comprise with shown in the band separation filter 111,112 and 113 that interconnects of mode, power estimator 121,122 and 123, signal detector 131,132 and 133 and terminal class determinant 141.These assemblies can be realized with the analog or digital circuit.
Three band separation filters 111～113 link to each other with circuit 60 from telephone set 2A, so that the separation signal frequency band.Shown in Fig. 4 A, band separation filter 111 is low pass filter (LPF), and what it transmitted is the signal component that is not higher than 3.4kHz, yet shown in Fig. 4 B, band separation filter 112 is band pass filter (BPF), and its transmits is signal component from 3.4 to 70kHz.Shown in Fig. 4 C, band separation filter 113 is high pass filter (HPF) in addition, and what it transmitted is the signal component that is not less than 70kHz.
Power estimator 121～123 is adapted to and is the corresponding separate bands of signal or sub-band rated output.Wherein for instance, power estimator 121～123rd is rated output on the predetermined time interval of 10ms in size.
131～133 of signal detectors are adapted to the signal whether these components that fall into the sub-band that filter 111～113 separated are included in from telephone set 2A and detect.Signal detector 131～133 is adapted to respectively carrying out smoothly from the power output of power estimator 121～123, so that level and smooth thus power output and respective threshold compared, thereby derives X, Y and Z as a result respectively at output.All comprised in logical one and " 0 " one as follows by detecting X, Y and resulting each result of Z, will output logic " 1 " when wherein the power after level and smooth exceeds threshold value, this shows that existence is in the signal component in the frequency band of being discussed, and will output logic " 0 " when level and smooth power does not exceed threshold value, this shows and does not have the signal component that is in the frequency band of being discussed.
Terminal class determinant 141 is adapted to frequency band testing result X, the Y and the Z that provide according to signal detector 131～133 and judges the classification of the telephone set 2A of interconnection, i.e. terminal class with it.Terminal class determinant 141 provides judgement according to the truth table that illustration among Fig. 5 shows, and consequent result of determination is exported as terminal class information 143.Be delivered to treatment circuit among the gateway unit 3A from the terminal class information 143 of terminal class determinant 141, wherein for instance, described treatment circuit can be control and VoIP processor 16, and this circuit comes the processing of adaptively modifying self execution according to the classification of telephone set 2A.For the application of terminal class identifying unit 100 is provided in line circuit 14 inside, terminal class information 143 has constituted the part of above-mentioned signal 64.
If the telephone set 2A that interconnects with gateway unit 3A is conventional subsets, signal band via circuit 60 emissions is 3.4kHz or lower so, so, what frequency band testing result X, Y that signal detector 131～133 is obtained and Z adopted respectively is logical value 1,0 and 0, and this result represents with [100].In response to this testing result, terminal class determinant 141 will judge that interconnection telephone set 2A is conventional subsets.
If the telephone set 2A that interconnects with gateway unit 3A is a broadband telephone set, this frequency band will be 7.0kHz or lower so.Therefore, testing result X, Y and the Z that derives from signal detector 131～133 is [110].So, terminal class determinant 141 will judge that interconnection telephone set 2A is a broadband telephone set.In addition, if the telephone set 2A that is adapted to is the audio band telephone set, frequency band will be 20kHz or lower so.In this case, the testing result X that signal detector 131～133 draws, Y and Z are [111], and terminal class determinant 141 can be judged the frequent charged phone of audio with interconnection telephone set 2A thus.Simultaneously, when testing result X, Y and Z are [101], its expression be the high frequency band composition that is comprised, think that thus the telephone set 2A that is adapted to is the audio band telephone set.
Logically, testing result X, Y and Z can not be [000], [001], [010] or [011].Yet if this occurs, with regard to present embodiment, wherein the telephone set 2A that is adapted to can be considered as conventional subsets so.
Can obtain and the signal that uses terminal class is judged is not limited to the voice signal launched from telephone set 2A, this signal also can be an available signal in the calling catenation sequence of setting up before calling out connection status.As selection, the signal that can be used for the terminal class judgement can also be the noise of telephone set 2A output, for example background noise.Even noise also can be subjected to as telephone set 2A providing above-mentioned terminal class judgement in the peculiar frequency band limits influence.
In definite telephone set class method for distinguishing, wherein can consider a kind of like this method, will operate the button that telephone set or gateway unit comprise in the method, so that input or set the telephone set classification in gateway unit.Yet because telephone set or gateway unit only actually have a small amount of button, and said method used any button in a small amount of button to come the setting terminal classification, so operating sequence is very complicated possibly.For the non-professional domestic consumer that puts into practice, this might cause the operability of this method very poor, thereby can't correctly set the gateway unit of being discussed.
Can make in addition with the following method as the additive method that is used for determining the telephone set classification, come the setting terminal classification by the operation dual in line switch in the method, and as discussed previously, there is difference in the mechanical form that is used to connect the connector of telephone set.Yet this wherein is difficult to be avoided occurring the misspecification dual in line switch or the risk of incorrect link connector.
Yet for the foregoing description, the telephone set classification is based on that effective band difference with different kind of telephone set determines, thus can be to terminal class, be that the telephone set classification that is adapted to is made correct judgement.In addition, because judgement automatically performs, therefore needn't worry because the misspecification that user's manual operation is caused.
Fig. 6 shows is alternative embodiment according to terminal class identifying unit 200 of the present invention.It is that conventional subsets, broadband telephone set or audio band telephone set are judged that this embodiment also is adapted to what link to each other with gateway unit.Terminal class identifying unit 200 comprise with shown in a pair of filter 211 and 212 that connects of mode, a pair of pulser circuit 221 and 222, a pair of pattern determinant 231 and 232 and terminal class determinant 241.
For instance, filter 211 is only to transmit the band pass filter (BPF) of size for the predetermined frequency component of 6kHz, and another filter 212 then is only to transmit the band pass filter of another size for the predetermined frequency component of 12kHz.
Shown in Fig. 8 A, in the present embodiment, send the signal of preset frequency with cycle of 200 milliseconds as the broadband telephone set of terminal 2A interconnection, the signal of 6kHz for example, and interrupt this frequency at 200 millisecond periods, thus this sequence is repeated pre-determined number.This one exemplary embodiment is applicable to determines three interconnection telephone set classifications.But undoubtedly, the present invention is not limited to this specific embodiment, but goes for definite two or three above adaptation telephone sets.
Pulser circuit 221 and 222 is respectively to convert the signaling conversion circuit of pulse signal 261 and 262 to from the output signal 251 and 253 of filter 211 and 212.Wherein for instance, undertaken adaptively by paired pulses device circuit 221 and 222, can obtain the envelope of input signal, and this envelope can be compared with threshold level, so that convert input signal to signal pulse 261 and 262 respectively.
Respectively pattern determinant 231 and 232 is carried out adaptively, examine so that whether the output signal 261 and 262 of corresponding pulses device circuit 221 and 222 is had the predetermined pattern shown in Fig. 8 C.When the signal that detects coherent pulse device output when each pattern determinant 231 and 232 satisfies predetermined pattern, it can be at output 272 that is associated or 272 output logics " 1 ", and failing to detect when satisfying predetermined pattern, its can be at output 271 that is associated or 272 output logics " 0 ".
Terminal class determinant 241 is adapted to the synthetic decision signal 271 and 272 that pattern determinant 231 and 232 is provided and makes response, so that the classification of definite telephone set 2A that is adapted to.Terminal class determinant 241 regularly carries out decipher to making up 271 and 272 from this output to pattern determinant 231 and 232 with predetermined judgement, and judges when this combination is [00], [10] and [01] that respectively this telephone set is conventional subsets, broadband telephone set or audio band telephone set.
For this one exemplary embodiment, the terminal class of telephone set or type are to determine when detecting interconnection telephone set 2A off-hook.Yet, judge regularly to be not limited to off-hook regularly that it all is optional in any appropriate timing.In addition, for judging regularly, here the situation that calling has been come from the telephone set 2A that is adapted to is described.Very advantageously be, as selection, the present invention can also be applied to such system, in this system, by this one exemplary embodiment and to the network element that is in the callee, just the 3B among Fig. 1 disposes, so that this unit is judged the type of interconnected with it telephone set 2B.Therefrom be understandable that, judge that by the terminal class that the operation of detection off-hook is carried out timing can be applied to either party among caller and the callee.
Fig. 7 shows is the part of another alternative embodiment of the telephone set 2A relevant with the present invention.In the figure, telephone set 2A is broadband or audio band telephone set, and comprise with shown in the mode oscillator controller 30, frequency oscillator 31 and the adder 32 that interconnect.
Oscillator controller 30 is that an off-hook detection signal 33 that is adapted to being received responds, and for frequency oscillator 31 provides the control circuit of oscillator control signal 35, wherein said signal has similar timing relationship to the signal 261 or 262 shown in Fig. 8 C.Off-hook detection signal 33 is that the off-hook detection transducer that never shows provides, and this transducer will detect the off-hook operation of telephone set 2A.
Also carried out adaptive here in addition to frequency oscillator 31, so that vibration and export a preset frequency 37 in from the cycle of the logical one of the oscillator control signal 35 of oscillator controller 30, and in cycle, interrupt this frequency from the logical zero of the oscillator control signal 35 of oscillator controller 30.In the present embodiment, frequency oscillator 31 respectively when self telephone set 2A is broadband and audio band telephone set vibration produce the frequency of size for 6kHz and 12kHz.
Adder 32 is one and is adapted to and will offers path 60 from the oscillator of frequency oscillator 31 output 37, and then offers the signal modulator of the gateway unit 3A that comprises self telephone set 2A.Wherein for instance, adder 32 has another and input from the interconnection of the transmission line of voice signal transmitter, and wherein the microphone 21 of this transmitter and Fig. 2 is similar.
When the telephone set 2A that adapts among the gateway unit 3A is conventional subsets, oscillator 31 will be subjected to such control, even wherein on telephone set 2A, detect the off-hook operation, can on preset frequency and predetermined time interval, not produce intermittently or the burst oscillation that repeats yet.So, pattern determinant 231 and 232 can produce a logical value set [10] at its output, and terminal class determinant 241 transfers to determine that the telephone set 2A that is adapted to is a broadband telephone set.
If the telephone set 2A that adapts among the gateway unit 3A is a broadband telephone set, and the off-hook that detects on telephone set 2A operation impels oscillator 31 controlled, thereby produces intermittent burst oscillation by one exemplary embodiment on the preset frequency of 6kHz.As a result, pattern determinant 231 and 232 can be derived one group of binary value [10] at its output, and terminal class determinant 241 judges that interconnection telephone set 2A is a broadband telephone set thus.
For present embodiment, when interconnection telephone set 2A was the audio band telephone set, the off-hook operation of telephone set 2A will impel on size is the frequency of 12kHz and produces intermittent burst oscillation.So, pattern determinant 231 and 232 can be derived one group of binary value [01] at its output.Then telephone set 2A is the audio band telephone set to terminal class determinant 241 then judgement interconnects.
In the present embodiment, certain electric phone classification is adapted on for the frequency of its special regulation and produces intermittent burst oscillation, and the gateway unit that adapts to this telephone set then is adapted to foundation and whether receives the classification of judging the telephone set 2A that is adapted to specific to its intermittent burst oscillation signal.Can correctly judge the classification of the telephone set 2A that is adapted to thus.In addition, because judgement is made automatically, therefore needn't worry to make misspecification at user side.
In the present embodiment, preset frequency is to select with respect to the effective band of the telephone set of being discussed.From this view point, the classification of the telephone set 2A that is adapted to can correctly be judged.
In the present embodiment, frequency oscillator 31 can be configured to work as follows.Shown in Fig. 9 A, if telephone set 2A is a broadband telephone set, then for example 200 milliseconds cycle emission for example size be the signal of the preset frequency of 6kHz, and at this signal of cycle interruption of 200 milliseconds, wherein this sequence will repeat pre-determined number.Shown in Fig. 9 C, if telephone set 2A is the audio band telephone set, will launch the signal 35 of preset frequency so in 300 milliseconds cycle in addition, and this signal can interrupt in 100 milliseconds cycle, wherein this sequence will repeat pre-determined number.
The signal that finally obtains converts pulse signal 37 to by frequency oscillator 31, will produce logical signal thus, these signals are to represent with the combination of logical one and " 0 ", and respectively shown in Fig. 9 B and 9D, the broadband is different with logical signal duration between the audio band telephone set.So, actually or terminal class determinant 241 can judge the telephone set broadband audio band telephone set that is adapted to.No matter when, as long as can't obtain the pulse signal shown in Fig. 9 B and the 9D, terminal class determinant 241 will judge that the telephone set 2A that is adapted to is conventional subsets so.
Present embodiment is applicable to broadband and audio band telephone set, and wherein shown in Fig. 8 A, 8B and 8C, repeat patterns is mutually the same, and frequency of oscillation is then different, and perhaps shown in Fig. 9 A～9D, frequency of oscillation is mutually the same, and repeat patterns is then different.According to the present invention, these elements can be combined.Wherein for instance, can there be difference in repeat patterns and frequency of oscillation between these two kinds of telephone set classifications.Conventional subsets can be adapted to and intermittently produce and the emission oscillation frequency signal.Single telephone set then can be exported two or more frequencies.In addition, this class signal is not limited to stable sine curve ripple, but can also carry out to a certain degree modulation to it.
Come another alternative embodiment of the terminal class identifying unit among the gateway unit 3A is described referring now to Figure 10.It is which telephone set in conventional subsets, broadband telephone set or the audio band telephone set is judged that the terminal class identifying unit 40 of present embodiment is adapted to what adapt among the gateway unit 3A.Terminal class identifying unit 40 comprise with shown in the mode voltmeter 41, ampere meter 42, impedance computation device 43 and the terminal class determinant 44 that interconnect.
Voltmeter 41 is adapted to be measured the voltage on L1 and the L2 the circuit that links to each other with the telephone set 2A that is adapted to, and the magnitude of voltage 411 that records is outputed to impedance computation device 43.Ampere meter 42 is adapted to be measured the blocking current of current through line L1 and the formed loop of L2.And ampere meter 42 outputs to impedance computation device 43 with the current value 413 that records with the form of digital value.
Impedance computation device 43 is adapted to reception respectively from the measurement result 411 and 413 of voltmeter 41 and ampere meter 42, so that calculate the impedance towards the telephone set 2A that is adapted to from gateway unit 3A.And impedance computation device 43 will be derived a signal 415 that is used to represent the impedance of calculating thus.
Terminal class determinant 44 is adapted to the classification according to the signal 415 definite telephone set 2A that adapted to that are derived from calculator 43.With regard to present embodiment, when impedance equals or approach 600,300 or 900 Ω, terminal class determinant 44 judges that respectively the telephone set of being discussed is conventional subsets, broadband telephone set or audio band telephone set, and in its output 143 output result of determination.In case the telephone set 2A off-hook that is adapted to, then terminal class determinant 44 will provide this result of determination.
In a broadband that connects as telephone set 2A or the audio band telephone set manifest in the application of above-mentioned resistance value during not at off-hook, this broadband or audio band telephone set can be adapted to have respectively shown in Figure 11 or 12 via circuit to circuit that L1 and L2 were coupled.In being about to the embodiment that describes, this broadband or audio band telephone set 2A comprise resistor 50, switch 51 and the on-off controller 52 that interconnects in mode shown in Figure 11 and 12.
When broadband telephone set was used as telephone set 2A, this telephone set 2A had comprised circuit shown in Figure 11, and in this circuit, the resistor 50 of series connection and switch 51 are connected to the gateway unit 3A that is associated via circuit to L1 and L2.For the resistor 50 of broadband telephone set 2A, this wherein will select its resistance value, so that in Closing Switch 51, the impedance of the telephone set 2A that sees from gateway unit 3A can equal or approach 300 Ω the present embodiment.
When used telephone set 2A is the audio band telephone set, telephone set 2A has comprised circuit shown in Figure 12, wherein resistor 50 links to each other with switch 51, so that resistor 50 links to each other with circuit L1 its terminal with one of L2, be example then here with circuit L1, in addition, switch 51 is connected with circuit L1 wherein, so that the connection of resistor 50 is controlled.For the resistor 50 of audio band telephone set, this wherein will select its resistance value, so that in Closing Switch 51, the impedance of the telephone set 2A that sees from gateway unit 3A can equal or approach 900 Ω the present embodiment.
On-off controller 52 is adapted to makes response to the above-mentioned off-hook detection signal 33 that provides from the off-hook detection transducer, so that predetermined time cycle Closing Switch 51.
In operation, when the telephone set 2A that adapts among the gateway unit 3A was conventional subsets, the off-hook of telephone set 2A operation can not make impedance that above-mentioned variation takes place, and the output 415 of impedance computation device 43 is as many as or approach 600 Ω thus.Then, the terminal class determinant 44 of gateway unit 3A judges that the telephone set 2A that is adapted to is conventional subsets.
When the telephone set 2A that is adapted to is the broadband telephone set that has comprised circuit shown in Figure 11, the off-hook operation of telephone set 2A will cause Closing Switch 51, so, for the impedance computation device 43 of gateway unit 3A, its output 415 shows that described value is as many as or approaches 300 Ω.Then, terminal class determinant 44 will judge that the telephone set 2A that is adapted to is a broadband telephone set.
When the telephone set that is adapted to is when having the audio band telephone set of circuit shown in Figure 12, the output of impedance computation device 43 415 is as many as or approach 900 Ω.Then, terminal class determinant 44 will judge that the telephone set 2A that is adapted to is the audio band telephone set.
Conventional subsets, broadband telephone set and audio band telephone set are being designed to have in the application of mutually different resistance value, Figure 11 and 12 shown circuit wherein needn't be provided.
Present embodiment is based on such idea, and that just is to use the classification of determining the telephone set 2A that adapted to towards the impedance of the telephone set 2A that is adapted to.Can accurately judge the classification of the telephone set that is adapted to thus.In addition, by the terminal class or the type of automatic judgement telephone set, the misspecification risk of User Part can be reduced to minimum.
The foregoing description is adapted to be operated the impedance of broadband and audio band telephone set.Yet conventional subsets also are adapted to be operated its impedance.As selection, here can also carry out system adaptive so that use the voltage between circuit on the local loop of the subsets adapted to or the blocking current of this loop of flowing through to determine the classification of the telephone set that adapted to.
For the invention described above embodiment, wherein can correctly judge the telephone set kind or the terminal class that are adapted in this class telephone set of telephone set or gateway unit or the user terminal adaptation unit.Wherein for instance, very advantageously be, the present invention is applicable to such system configuration, and wherein subsets or terminal can communicate with IP network or public switch telephone network selectively.
As a reference, here introduced respectively on December 26th, 2002 and the Japanese patent application 2002-377165 of submission on February 28th, 2003 and whole disclosures of 2003-52957, comprising the specification in the described disclosure, claims, accompanying drawing and summary comprehensively.
Though here invention has been described by the specific one exemplary embodiment of reference, the present invention is not limited to these embodiment.It should be understood that those skilled in the art can change or revise these embodiment under the situation that does not break away from the scope of the invention and essence.

Claims (22)

1. voice communication apparatus, comprise can with any one port that links to each other in conventional subsets and the broadband telephone set, described equipment places communicating by letter between link to each other telephone set and the public switch telephone network, and described equipment comprises to be changed the signal that transmits and receives for telephone set, so that signal satisfies the filter of the signal condition of public switch telephone network defined.
2. voice communication apparatus, this equipment can link to each other with in conventional subsets and the broadband telephone set any one, and described equipment places communicating by letter between link to each other telephone set and the public switch telephone network, and wherein said equipment comprises:
Be used for determining the circuit of continuous telephone set classification; And
In to process, change the circuit of sample frequency at least according to determined telephone set classification from the analog signal sampling of telephone set.
3. voice communication apparatus comprises:
Be used on any one network of broadband network and public switch telephone network, setting up selectively the telephone circuit of calling out; And
Those signals that transmit and receive for described telephone circuit are changed, so that signal satisfies the filter of the signal condition of public switch telephone network defined.
4. voice communication apparatus comprises:
Be used on any one network of broadband network and public switch telephone network, setting up selectively the telephone circuit of calling out;
Be used for determining on which network of broadband network and public switch telephone network, to set up first circuit of calling out; And
In to the process from the analog signal sampling of described telephone circuit, the judgement of making according to described first circuit changes the second circuit of sample frequency at least.
5. telephone set that links to each other with network, this network comprises at least one network in public switch telephone network and the broadband communication network, described telephone set comprises:
Be used for receiving the signal of the type that is used for definite at least one network, and determine that this network is the decision circuit of which network in public switch telephone network and the broadband communication network from network; And
Select at least one selection circuit in response to the result that described decision circuit produced about the communication band of this network.
6. according to the telephone set of claim 5, wherein signal has the frequency band that has difference between public switch telephone network and broadband communication network.
7. voice communication system, comprise any one in conventional subsets and the broadband telephone set, and voice communication apparatus, described equipment places communicating by letter between at least one network of the described telephone set that comprised and public switch telephone network and broadband communication network, wherein
Described voice communication apparatus comprises the circuit that sends the signal of the type that is used for definite at least a network to described telephone set;
Described telephone set comprises:
Be used to receive described signal that described circuit sends out so that judge that according to received signal described at least one network is the public switch telephone network or the decision circuit of broadband communication network; And
Select one at least about the selector circuit of the communication band of this network in response to the result of described decision circuit.
8. voice communication system, comprise any one in conventional subsets and the broadband telephone set, and voice communication apparatus, described equipment is got involved in the communicating by letter between at least one network in the described telephone set that comprised and public switch telephone network and the broadband communication network, and wherein said voice communication apparatus comprises:
Be used to determine first circuit of the described telephone set classification that comprised; And
Operate in response to determined classification, thus the second circuit of the co-channel signal attribute that change transmits between described telephone set that is comprised and described voice communication apparatus.
9. system according to Claim 8, wherein said first circuit uses the signal that obtains from the described telephone set that is comprised or the characteristic value of the described telephone set management that is subjected to be comprised is determined the classification of the described telephone set that comprised.
10. system according to Claim 8, wherein said first circuit sends signal or changes the characteristic value of the connecting line that links to each other with the described telephone set that is comprised to the described telephone set that is comprised, so that use the classification of determining the described telephone set that comprised from the response signal of the described telephone set reception that comprised or the variation the response signal.
11. system according to Claim 8 wherein provides database on broadband communication network, so that retrieval relates to the data of telephone set classification,
Described first circuit provides from the information of the characteristic value of the signal of the described telephone set that is comprised or the described telephone set management that comprises about being subjected to or about the information of the variation in response signal or the response signal for described database, so that obtain the classification of the described telephone set that is comprised from described database, response signal is to obtain from the telephone set that is comprised by send the characteristic value that signal or change be connected to the connecting line of the described telephone set that is comprised to the described telephone set that is comprised.
12. system according to Claim 8 wherein provides database on broadband communication network, so that retrieval relates to the data of telephone set classification,
Described second circuit provides following at least one for described database: the information of the characteristic value of the described telephone set management that comprises about being subjected to of obtaining from the signal of the described telephone set that is comprised or by described first circuit, information about the variation in response signal or the response signal, and the information of representing fixed classification, so that from described database, obtain the changing content of the attribute of co-channel signal, thereby change the attribute of co-channel signal, response signal is to obtain from the telephone set that is comprised by send the characteristic value that signal or change be connected to the connecting line of the described telephone set that is comprised to the described telephone set that is comprised.
13. system according to Claim 8 also comprises tertiary circuit, it obtains classification information with corresponding another telephone set of described telephone set that comprised by public switch telephone network or broadband communication network;
Described second circuit is made response to determined classification and information that described tertiary circuit obtained, thereby changes the attribute of co-channel signal.
14. voice communication system, comprise any one in conventional subsets and the broadband telephone set, and voice communication apparatus, described equipment and the described telephone set interconnection that is comprised, and place communicating by letter between at least one network of the described telephone set that comprised and public switch telephone network and broadband communication network, wherein said voice communication apparatus comprises:
Be used to determine first circuit of the described continuous telephone set classification that comprised; And
Be used to the telephone set that is comprised to provide and change order, so that the second circuit of change and determined classification corresponding characteristic;
The described telephone set that is comprised comprises makes response to changing order, thereby changes the tertiary circuit of the co-channel signal attribute that transmits between described voice communication apparatus and the described telephone set that comprised.
15. according to the system of claim 14, wherein on broadband communication network, provide database, so that retrieval relates to the data of telephone set classification,
Described second circuit provides following at least one for described database: the information of the characteristic value of the described telephone set management that comprises about being subjected to of obtaining from the signal of the described telephone set that is comprised or by described first circuit, information about the variation in response signal or the response signal, and the information of representing fixed classification, change order so that from described database, obtain, so that the described telephone set that is comprised is exported in described order, response signal then is to obtain from the telephone set that is comprised by send the characteristic value that signal or change be connected to the connecting line of the described telephone set that is comprised to the described telephone set that is comprised.
16. system according to claim 15, stored in the wherein said database and change order, described change order is based on the frequency characteristic from subscriber line interface to earphone of the described telephone set of measuring in advance and the frequency characteristic from microphone to subscriber line interface of the described telephone set measured in advance forms.
17. according to the system of claim 14, wherein said first circuit is based on from the signal of the described telephone set that is comprised or be subjected to the characteristic value of the described telephone set management that comprised to determine the classification of the described telephone set that comprised.
18. system according to claim 14, wherein said first circuit is to described telephone set transmission signal that is comprised or the characteristic value that changes the connecting line that links to each other with the described telephone set that is comprised, so that obtain the response signal of the described telephone set that is comprised, thereby based on the response signal or the classification of the next definite described telephone set that is comprised of response signal variation.
19. according to the system of claim 14, wherein on broadband transmission network, provide database, so that retrieval and the corresponding data of telephone set classification,
Described first circuit is for described database provides signal from the described telephone set that is comprised, the information of the characteristic value of the described telephone set management that comprises about being subjected to or about the information of the variation in response signal or the response signal, so that obtain the classification of the described telephone set that is comprised from described database, wherein response signal is by sending signal to the described telephone set that is comprised or the characteristic value that changes the connecting line that links to each other with the described telephone set that is comprised obtains from the telephone set that is comprised.
20. according to the system of claim 17, also comprise the 4th circuit, it obtains classification information with corresponding another telephone set of described telephone set that comprised by public switch telephone network or broadband communication network;
Described tertiary circuit responds to determining the information that classification and described the 4th circuit obtain, thereby changes the attribute of co-channel signal.
21. according to the system of claim 18, also comprise the 4th circuit, it obtains classification information with corresponding another telephone set of described telephone set that comprised by public switch telephone network or broadband communication network;
Described tertiary circuit changes the attribute of co-channel signal to determining that information that classification and described the 4th circuit obtain responds.
22. according to the system of claim 19, also comprise the 4th circuit, it obtains classification information with corresponding another telephone set of described telephone set that comprised by public switch telephone network or broadband communication network;
Described tertiary circuit responds to determining the information that classification and described the 4th circuit obtain, thereby changes the attribute of co-channel signal.
CN 200380107488 2002-12-26 2003-12-25 Voice communications system Expired - Fee Related CN100490484C (en)

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JP2002377165A JP4255276B2 (en) 2002-12-26 2002-12-26 Voice communication device, telephone and voice communication system
JP52957/2003 2003-02-28

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