ISL software implementation
There are two modes of ISDN Signaling Link (ISL) operation, shared mode and dedicated
mode.
Shared mode
The NT
AK79 on-board DCHI supports ISDN PRI signaling and ISL trunks. The configuration
is basically the same as the PRI D-channel, with the D-channel also supporting ISL trunks.
The DTI/PRI software implementation sequence can be used (refer to the appropriate chapters
for more information) with the following exceptions.
Table 86: LD 17 - Shared mode
Prompt Response Description
USR SHA D-channel for ISL in "shared" mode, used for both
ISDN PRI and ISL.
ISLM 1-240 Number of ISL B-channel (trunks) controlled by the D-
channel (no default value).
Table 87: LD 16 - Interface type
Prompt Response Description
IFC SL1 Interface type must be SL1 (this is the only type
supported for ISL).
MODE ISLD TIE route used for ISL members.
Table 88: LD 14 - Channel identifier
Prompt Response Description
CHID 1-240 Channel identifier for ISL channels. Must be
coordinated with the far-end.
Dedicated mode
The DCHI uses the NT
AK02 circuit card and does not support ISDN PRI signaling. The DCHI
is reserved for ISL use only. The D-channel can communicate with the far-end by means of a
dedicated leased line modem or dial-up modem.
2.0 Mb ISL maintenance
170 ISDN Primary Rate Interface Maintenance November 2011
Comments? infodev@avaya.com
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