Nortel Networks NTRN10AN, 3500 manual Retrieving performance monitoring counts

2-110Operation, administration, and maintenance (OAM) features

Table 2-24 (continued)

DS1 performance monitoring - supported parameters for DS3VTx12

PM parameter	DS1/DS1e and DS1TM	DS3VTx12 circuit pack
	circuit packs	See Note
UASP Near End Tx	√
UASP Far End Tx	√

Note: DS3/VTx12 circuit pack is not supported on shelves equipped with STX-192 circuit packs.

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.

OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004