Avaya DEFINITY Server R Manual page 446

Adding or Removing Cabinet Hardware
add ds1 2b08
Signaling Mode: CAS
Interface Companding: mulaw
Slip Detection? y
Echo Cancellation? y
EC Configuration: 1
5. On the DS1 Circuit Pack screen, set the Echo Cancellation? field to y.
When set to y, 2 new fields display: EC Direction: and EC
Configuration:.
Keep the default setting for the EC Configuration: field of 1. This setting
rapidly minimizes echo when first detected, regardless of the loudness of the
talker's voice.
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 EC Configuration: field to 2, 3, or 4, then
test the voice quality. These settings provide help for the following
scenarios:
8. If after trying all these settings, the echo still exists, contact technical
support. Refer to
7-30
Issue 5 October 2002
Location: 02B08
Bit Rate: 2.048
Interconnect: pbx
Idle Code: 11111111
EC Direction: inward
If you know the echo is coming into the Avaya Media Gateway, keep
the default setting for the EC Direction: field of inward.
If you know that the distant party is hearing echo that originates in
the Avaya Media Gateway or its line side stations or equipment, set
the EC Direction: field to outward.
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.
Setting 4 minimizes 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.
Where To Call for Technical Support.
Page
DS1 CIRCUIT PACK
Name: Echo Cancel t23
Line Coding: hdb3
Country Protocol: 1
CRC? n
Near-end CSU Type: other
1 of 1 SPE B
555-233-115