A portable, automated telephone line test device includes a test module which applies test signals to a telephone line to be tested and detects electrical characteristics of the telephone line, and a user interface module. The user interface module includes a microprocessor, a display, a keyboard and...http://www.google.co.uk/patents/US6438212?utm_source=gb-gplus-sharePatent US6438212 - Automated telephone line test apparatus with intelligent diagnostic function
