Avaya S8700 Maintenance Manual page 522

Maintenance Object Repair Procedure
Loopbacks
There is no automatic process to signal the remote end to provide loopbacks for
testing purposes. Every loop back to be tested with a single circuit pack must be
a local loop back on the circuit pack.
Remote loopbacks may be possible with the TDM network equipment with
appropriate coordination between BCS Services Technicians and the service
technicians of the TDM equipment (considered a CPE device).
TN464GP/TN2464BP UDS1 Circuit Packs with
Echo Cancellation
The TN464GP and TN2464BP UDS1 circuit packs feature an integrated echo
canceller. Echo cancellation is a Software Right-To-Use feature that can be
turned as needed. Echo cancellation supports channels carrying voice and is not
intended for channels that support data. The TN464GP/TN2464BP will have the
capability to detect modem tone and turn off echo cancellation accordingly for the
duration of a data call. Echo cancellation on the TN464GP/TN2464BP will be
administrable per channel. The echo cancellation circuitry on a given
TN464GP/TN2464BP is driven by administrable parameters.
The TN464GP/TN2464BP circuit packs are intended for use with ATM, IP,
wideband, or other complex services which are likely to have problems with echo.
The echo cancellation circuitry on a given TN464GP/TN2464BP is a right-to-use
feature activated via license file. You can determine whether this option is active
by viewing the System-Parameters Customer-Options form. Also on this form is a
field Maximum Number of DS1 Boards with Echo Cancellation that
indicates the number of DS1 boards on which echo cancellation is activated for a
specific customer.
The DS1 CIRCUIT PACK form for the TN464GP/TN2464BP circuit packs has
fields to support echo cancellation: Echo Cancellation?, EC Direction,
and EC Configuration. The Echo Cancellation? field displays only if the
Echo Cancellation feature has been activated on the System-Parameters
Customer Options form. The EC Direction and EC Configuration fields
do not display unless the DS1 Echo Cancellation? field is enabled.
EC Direction determines the direction from which echo will be eliminated,
ether inward or outward.
EC Configuration is the set of parameters that will be used when cancelling
echo. This information is stored in firmware on the UDS1 circuit pack.
8-1218 Issue 1 May 2002 555-233-142