Chapter 9: ISDN Signaling Link
maintenance
Contents
This section contains information on the following topics:
ISL status formats on page 87
Print programs (LD 20, 21, 22) on page 88
ISL startup on page 89
Dedicated D-channel using DTI or PRI on page 89
ISL recovery on page
90
ISL status formats
If a trunk unit is controlled by the ISL
feature, the STAT commands in LD 32 and LD 36 will do
the following:
• indicate the trunk is an ISL trunk, and
• display the status of the D-channel
The display format is the same for both programs. See
Table 25: ISL status check in LD 32
and 36 on page 87
.
Table 25: ISL status check in LD 32 and 36
Command Response
STAT L S C UNIT 00 = IDLE ISL TRK D-CH <ch #> <status> UNIT
01 = IDLE ISL
TRK D-CH <ch #> <status>
STAT L S C U IDLE ISL TRK D-CH <ch #> <status>
When a trunk unit is controlled by ISL, the STAT L command in LD 60 indicates the trunk is an
ISL
trunk. The STAT L CH command indicates the trunk is an ISL trunk and displays the status
ISDN Primary Rate Interface Maintenance November 2011 87
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