Nortel Networks 553-3001-211 manual Clock timing option, Test and maintenance features, Self-test

Page 844 of 894 QPC513 Enhanced Serial Data Interface card

Table 261

Characteristics of synchronous ports (Part 2 of 2)

Characteristics	Description
Data Link Level LAPB protocol remote	(3), 1
host address
Modify link control system parameters*	yes, (no)
Modify link performance thresholds	yes, (no)
(Note 1)

Note 1: * See the Configuration Record (LD 17) in Software Input/Output: Administration (553-3001-311) to modify the link control system parameters and performance thresholds.

Note 2: The values in parentheses are the default.

Clock timing option

The ESDI card offers two timing options:

•Internal: The ESDI card uses an internal timing source to synchronize data transfers to the external device.

•External: The ESDI card accepts a timing source from the high-speed interface connector to synchronize data transfers to the external device.

Test and maintenance features

The ESDI card has these built-in testing and maintenance capabilities:

Self-test

The ESDI card performs a self-test of its major components immediately after power-up. The self-test can also be initiated through the Link Diagnostic program LD 48. The self-test tests all ESDI functions up to, but not including, the ESDI line drivers and receivers.

553-3001-211 Standard 2.00 September 2004