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Cisco BTS 10200 Softswitch Troubleshooting Guide, Release 5.0.x
OL-8723-19
Chapter 10 Signaling Troubleshooting
Monitoring Signaling Events
Integrated Services Digital Network Unable to Restore D-channel Due to Failed
Communication—Signaling (70)
The Integrated Services Digital Network Unable to Restore D-channel Due to Failed Communication
event serves as a warning that the ISDN signaling adapter is unable to restore D-channel due to a
communication failure. The primary cause of the event is that the ISDN signaling adapter is unable to
restore a D-channel due to incorrect backhaul provisioning at the media gateway or call agent. To correct
the primary cause of the event, ensure the provisioning of the backhaul port is correct at both the call
agent and media gateway.
Integrated Services Digital Network Unable to Establish
D-channel—Signaling (71)
The Integrated Services Digital Network Unable to Establish D-channel event serves as a warning that
the ISDN signaling adaptor is unable to establish D-channel. The primary cause of the event is that ISDN
signaling adapter is unable to establish a D-channel due to layer 1 parameters not being provisioned
correctly or improper provisioning of the network or user side. To correct the primary cause of the event,
verify the correct provisioning at the media gateway.
Integrated Services Digital Network–Calls Lost Due to D-channel Down for
Period of Time—Signaling (72)
The Integrated Services Digital Network–Calls Lost Due to D-channel Down for Period of Time event
serves as a warning that calls were lost due to the D-channels being down for a period of time. The
primary cause of the event is that ISDN signaling adapter has lost calls due to a D-channel being down
as a result of a media gateway power loss or a loss of connection between the PBX and media gateway.
To correct the primary cause of the event, resupply power to the media gateway and verify that the
connection between the PBX and media gateway is intact.
Integrated Services Digital Network–Unable to Send RESTART Due to
RESTART Timer Expired—Signaling (73)
The Integrated Services Digital Network–Unable to Send RESTART Due to RESTART Timer Expired
event serves as a warning that the ISDN signaling adapter was unable to send a restart due to the restart
timer being expired. The primary cause of the event is that the ISDN signaling adapter was unable to
send a RESTART message due to the expiration of the RESTART timer. To correct the primary cause
of the event, verify that the RESTART timer is set to an appropriate level.