Avaya CMC1 Installation Manual page 213

5
On the DS1 Circuit Pack screen, set the
When set to y, 2 new fields display:
•
If you know the echo is coming into the Avaya CMC1 Media Gateway, keep the default
setting for the
•
If you know that the distant party is hearing echo that originates in the Avaya CMC1
Media Gateway or its line side stations or equipment, set the
outward.
•
Keep the default setting for the
extremely strong echo, very hot signals, or excessive clipping or breakup of speech from a
distant party. It reduces speech clipping but may allow slight residual echo or more
background noise.
6
Test the voice quality on a telephone connected through the TN464GP or TN2464BP circuit packs
and known to have echo to see if the echo was eliminated.
7
If the echo still exists, set the
These settings provide help for the following scenarios:
•
Setting 1 rapidly minimizes echo when first detected, regardless of the loudness of the
talker's voice. Settings 1 and 4 have the same EC settings except that Setting 1 introduces
6 dB of loss.
•
Setting 2 minimizes speech clipping, but it takes a fraction of a second longer for the echo
to fade.
•
Setting 3 eliminates speech clipping, but a strong echo may take 2 or 3 seconds to fade.
8
If after trying all these settings, the echo still exists, contact technical support. Refer to
get additional help
Installation, Upgrades and Additions for Avaya CMC1 Media Gateways
June 2004
Install TN464GP/TN2464BP with Echo Cancellation
Echo Cancellation?
EC Direction:
field of inward.
EC Direction:
EC Configuration:
EC Configuration:
on page 17.
Adding or Removing Hardware
field to y.
and
EC Configuration:
EC Direction:
field of 4. This setting minimizes
field to 1, 2, or 3, then test the voice quality.
.
field
to
Where to
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