Trunk level echo canceller test system

Details Trunk level echo canceller test system Trunk level echo canceller test system

2006-08-22

2006-08-22

Duong, Frank (Department: 2616)

Multiplex communications

Duplex

Transmit/receive interaction control

C370S250000, C379S003000

Reexamination Certificate

active

07095720

ABSTRACT:
Integrated echo cancellers in a telecommunications system are tested using a test apparatus connected to the main communications trunk where a large number of individual signals are multiplexed together. The signals are de-multiplexed in the test apparatus and specific amounts of echo delay, echo magnitude, and line delay can be introduced for any selected signals within the group on the trunk. The signals are then re-multiplexed and returned to the trunk in a direction back toward the echo canceller.

REFERENCES:
patent: 4558187 (1985-12-01), Billi et al.
patent: 4862449 (1989-08-01), Hoefkens et al.
patent: 5008923 (1991-04-01), Kitamura et al.
patent: 6067299 (2000-05-01), DuRee
patent: 6185300 (2001-02-01), Romesburg
patent: 6411117 (2002-06-01), Hatamian

Affiliated with

Also associated with

Rating

Trunk level echo canceller test system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Trunk level echo canceller test system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Trunk level echo canceller test system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3664223