05764694 is referenced by 19 patents and cites 7 patents.

A testing and evaluation system for efficiently qualifying individual components of a modem. A modem data pump acts as a dBm meter by measuring distortion, noise floor, and echo. The modem is coupled to a computer and a remote modem. After calibration, the remote modem may be disconnected. A resistor having a preselected resistance is coupled to the modem to allow the computer to measure the modem noise floor and distortion independent of particular telephone connections. An echo canceler coupled to the receive line allows the sum distortion and noise to be measured.

Title
Self-testing and evaluation system
Application Number
8/590699
Publication Number
5764694
Application Date
January 25, 1996
Publication Date
June 9, 1998
Inventor
Jason B Brent
Foothill Ranch
CA, US
Raphael Rahamim
Orange
CA, US
Agent
Susie H Oh
William C Cray
Assignee
Rockwell International Corporation
CA, US
IPC
H04B 3/46
View Original Source