Avaya S8700 Series, Руководство по обслуживанию

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UDS1-BD (UDS1 Interface Circuit Pack)
Issue 1 May 2002 8-1715 555-233-143
Echo cancellation is turned on or off on a per trunk-group basis using the change
trunk-group command. If the TRUNK GROUP field,
DS1 Echo
Cancellation?
is set to
y
, echo cancellation will be applied to every
TN464GP/TN2464BP trunk member in that trunk group. The echo cancellation
parameters used for a given trunk member are determined by the Echo
Cancellation Configuration Number administered on the DS1 Circuit Pack form
for that specific trunk’s board.
Echo cancellation on the TN464GP/TN2464BP is selectable per channel, even
though it is administrable on a per trunk-group basis. For example, if all but two
ports on a TN464GP/TN2464BP need to have echo cancellation applied, those
two ports must be put in a trunk group where the
DS1 Echo Cancellation
field
is set to
n
. The remaining ports will be in a trunk group(s) where the
DS1 Echo
Cancellation
field is set to
y
. A user will have the ability to cancel echo coming
from the network (far-end echo) or coming from the switch (near-end echo).
The TN464 UDS1 Circuit Pack
The TN464C, D, E, F, and GP Universal DS1 Interface circuit packs provide an
interface to the DS1 facility, and are designed to support 24 DS0 channels on a
1.544-Mbps DS1 link, or 32 DS0 channels on a 2.048-Mbps link. (The 32-channel
interface is not supported on G3r V1 systems.) The DS0 channels can be
administered as trunks to other switches, lines to off-premises stations, ports to
line-side PRI terminating devices, or ports to other line-side non-PRI terminating
devices. (DS0 channels on TN464/Bs can only be administered as trunks to other
switches.) For more information about how TN464 ports can be used, see the
MOs (MOs):
‘‘ISDN-SGR (ISDN-PRI Signaling Group)’’ , ‘‘ISDN-TRK (DS1 ISDN
Trunk)’’ , ‘‘ISDN-LNK (ISDN-PRI Signaling Link Port)’’ , ‘‘PE-BCHL (PRI Endpoint
Port)’’ , ‘‘TIE-DS1 (DS1 Tie Trunk)’’ , ‘‘CO-DS1 (DS1 CO Trunk)’’ , ‘‘DID-DS1 (Direct
Inward Dial Trunk)’’ , ‘‘OPS-LINE (DS1 Off-Premises Station Line)’’ , and
‘‘WAE-PORT (Wideband Access Endpoint Port)’’ .
NOTE:
For information about other DS1 circuit packs, see ‘‘DS1-BD (DS1 Interface
Circuit Pack)’’ on page 8-586 .
NOTE:
The TN464GP provides Echo Cancellation, and in addition, the TN464GP
firmware may be updated using the firmware download feature.
Throughout this MO on the UDS1-BD, the term TN464 will mean any TN464C or
later suffix UDS1 circuit pack. If part of this section refers to a specific suffix
TN464 board, it will be noted as such.
The UDS1 maintenance strategy includes logging in-line errors reported by the
UDS1 circuit pack, running tests for error diagnosis and recovery, and raising or
clearing maintenance alarms.