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Cisco BTS 10200 Softswitch Troubleshooting Guide, Release 5.0.x
OL-8723-19
Chapter 10 Signaling Troubleshooting
Troubleshooting Signaling Alarms
Message Transfer Part 3 User Adapter Cannot Go Standby—Signaling (121)
The Message Transfer Part 3 User Adapter Cannot Go Standby alarm (major) indicates that the M3UA
process cannot go into standby mode. The primary cause of the alarm is that no INACTIVE ACK
messages are being received from any Signaling Gateway. The SG or SCTP associations are probably
down. To correct the primary cause of the alarm, investigate other alarms to see if SGs are down or if
SCTP associations are down. Take corrective action according to those alarms.
This alarm is raised at initial startup or during failover by the BTS 10200 node that is trying to go into
platform Standby mode. See the
“Stream Control Transmission Protocol Association Degraded (One of
Two Internet Protocol Connections Down)—Signaling (111)” section on page 10-150
to determine why
the BTS 10200 is unable to communicate with any of the SGs at the M3UA layer. See the
Stream Control Transmission Protocol Association Status” section on page 13-2
to determine why the
BTS 10200 is unable to communicate with any of the ITPs at the SUA layer.
Message Transfer Part 3 User Adapter Cannot Go Active—Signaling (122)
The Message Transfer Part 3 User Adapter Cannot Go Active alarm (major) indicates that the M3UA
process cannot go into active mode. The primary cause of the alarm is that no ACTIVE ACK messages
are being received from any Signaling Gateway. The SG or SCTP associations are probably down. To
correct the primary cause of the alarm, investigate other alarms to see if SGs are down or if the SCTP
associations are down. Take corrective action according to those alarms.
This alarm is raised at initial startup or during failover by the BTS 10200 node that is trying to go into
platform Active mode. It occurs when this BTS 10200 node is unable to communicate properly with any
SGs to tell them that all active call traffic should be routing towards the BTS 10200. See the
to determine why the BTS 10200 is unable to
communicate with any of the ITPs at the M3UA layer. Refer to the
Transmission Protocol Association Status” section on page 13-2
to determine why the BTS 10200 is
unable to communicate with any of the ITPs at the SUA layer.
Remote Subsystem is Out Of Service—Signaling (124)
The Remote Subsystem is out of Service alarm (minor) indicates that the remote subsystem is
out-of-service. The primary cause of the alarm is that the link lost connection or the remote subsystem
is out-of-service. This alarm indicates the remote subsystem is out-of-service. To correct the primary
cause of the alarm, contact your service control point (SCP) service provider for assistance.
Note
This alarm can occur when there is an SS7 outage affecting a non-adjacent remote destination point code
(DPC) where the global title translation (GTT) database resides. The SS7 SCP subsystems in the BTS
10200 show the allowed status but the related DPC shows unavailable.
Signaling Connection Control Part Routing Error—Signaling (125)
The Signaling Connection Control Part Routing Error alarm (major) indicates that the SCCP route was
invalid or not available. The primary cause of the alarm is that the SCCP route is invalid or is not
available. To correct the primary cause of the alarm, provision the right SCCP route.
