Nortel Networks OPTera Metro 3500 - Manual (Page 148)

2-110 Operation, administration, and maintenance (OAM) features
OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Retrieving performance monitoring counts
OPTera Metro 3500 Release 11.0 introduced enhancements for retrieving
performance monitoring (PM) counts.
• A faster retrieval method is used to retrieve PM counts for DS1 service
module (DSM) facilities and for protected DS1 facilities.
Note: DSM facilities include DS1, OC-3, and STS-1 facilities that carry
traffic on a DSM.
• A continuation message mechanism is implemented in the response block
for RTRV-PM TL1 commands.
PM retrieval uses a continuation message mechanism, as described below.
• A TL1 response is displayed within two minutes after you issue a
RTRV-PM command.
• If no PM data is available within 2 minutes, a continuation message is sent
to the TL1 session. The continuation message is sent at regular intervals (1
minute and 40 second intervals), until PM data is available. The
continuation message mechanism indicates that additional time is required
for reporting PM data and prevents the MOA or Site Manager from timing
out.
Note: The MOA or Site Manager times out if no response is received in
two minutes.
• If partial or complete PM data is available in under two minutes, it is
reported to the TL1 session. The termination character in the response
message indicates whether the data is incomplete or complete (see
Table
2-25 ).
• When all PM data has been reported, the termination character in the last
response indicates that the process is complete.
Note: A time change on the network element does not affect the operation
of the continuation message timer.
UASP Near End Tx √
UASP Far End Tx
√
Note: DS3/VTx12 circuit pack is not supported on shelves equipped with STX-192 circuit
packs.
Table 2-24 (continued)
DS1 performance monitoring - supported parameters for DS3VTx12
PM parameter DS1/DS1e and DS1TM
circuit packs DS3VTx12 circuit pack
See
Note