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February 2003 2-35
1000-A2-GN22-00 2. CPX-1000 Voice Services Platform Description
Echo
Cancellation
Module
The Echo Cancellation module (Figure 2–17) supports echo
cancellation with tail up to 64 milliseconds per channel for up to
672 DS0s in accordance with ITU G.165 and ITU G.168.
The Echo Cancellation module is only used when echo cancellation
is needed, in conjunction with the Octal T1 module. The
Status
indicator color means the following:
yellow—CPX shelf is using the EC module
off—CPX shelf is not using the EC module
Figure 2–17. Echo Cancellation Module
0179
STATUS