Isl Recovery - Avaya CS 1000 Maintenance Manual

ISDN Signaling Link maintenance

ISL recovery

The D-channel goes down if the following occurs:
• the modem, ADM, ASIM, or HSDM power is off
• the hotline call between the system and the modem, ADM, ASIM, or HSDM is dropped
The system handles these possibilities in the following way:
1. The system CPU schedules a data link diagnostics program, which runs in
2. If this program finds that the link is not established, it requests the maintenance
3. The hotline call is brought up as it is during installation.
Note:
The Radio Frequency Interference (RFI) filter connectors are attached to the QCAD42 cable.
To install the RFI filters, see the instructions for installing the EMI filters in the system
installation documents.
90 ISDN Primary Rate Interface Maintenance
background mode.
program to reestablish the data link by reinitializing the hotline connection.
The ASIM can automatically reinitiate the hotline call with the Forced DTR option
set to ON.
A modem with auto-dial capability is required to automatically bring up the D-
channel in the configuration below.
Comments? infodev@avaya.com
November 2011