Chapter 12: 1.5 Mb ISL maintenance
Contents
This section contains information on the following topics:
Overview on page 123
ISL maintenance tools on page 126
Overview
From a maintenance perspective, ISL
operation consists of these elements:
• hardware and software states
• near-end and far-end status
• link and/or span integrity
ISL operation is monitored and reported on through service messages.
System maintenance provides several tools, manual or automatic, for maintaining effective ISL
operation. These tools are service commands (accessible through the software overlays) and
diagnostic routines.
Maintenance messages
The following sections describe service messages that can appear on the system maintenance
TTY
as a result of ISL operation.
D-channel status and error conditions are reported as DCH messages. PRI status and error
conditions are reported in the messages found in
Table 57: Status messages on page 124.
Additional information on DCH and PRI messages can be found in the A
vaya Software Input
Output Reference - System Messages (NN43001-712).
ISDN Primary Rate Interface Maintenance November 2011 123
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