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Cisco IP Telephony Troubleshooting Guide for Cisco CallManager Release 3.0(1)
© 2000 Cisco Systems, Inc. 2
Conference Bridge.................................................................................................................32
Transcoding Problems...........................................................................................................33
MTP Resource Problems.......................................................................................................35
Dial Plans ..............................................................................................................................37
Partitions................................................................................................................................38
Security..................................................................................................................................40
Slow Server Response...............................................................................................................42
Reorder Tone Through Gateways .............................................................................................42
Gateway Registration Problems................................................................................................43
Gatekeeper Problems.................................................................................................................48
Inter-Cluster Trunks Only.....................................................................................................48
Admission Rejects (ARJ)......................................................................................................48
Registration Rejects (RRJ)....................................................................................................49
Intra-Cluster Cisco IP Phone-to-Cisco IP Phone Calls.................................................................50
Sample Topology ......................................................................................................................50
Cisco IP Phone Initialization Process........................................................................................50
Skinny Station Registration Process .........................................................................................52
Cisco IP Phone-to-Cisco IP Phone Call Flow within a Cluster ................................................53
Cisco IP Phone-to-Cisco IP Phone Exchange of Skinny Station Messages during Call Flow.54
Cisco CallManager Initialization Process .................................................................................55
Self-Starting Processes..............................................................................................................56
Cisco CallManager Registration Process..................................................................................57
Cisco CallManager KeepAlive Process ....................................................................................58
Cisco CallManager Intra-Cluster Call Flow Traces..................................................................59
Cisco IP Phone-to-Cisco IOS Gateway Calls ...............................................................................63
Sample Topology ......................................................................................................................63
Call Flow Traces .......................................................................................................................63
Debug Messages and Show Commands on the Cisco IOS Gatekeeper....................................66
Debug Messages and Show Commands on the Cisco IOS Gateway........................................67
Cisco IOS Gateway with T1/PRI Interface...............................................................................70
Cisco IOS Gateway with T1/CAS Interface .............................................................................71
Inter-Cluster Cisco IP Phone-to-Cisco IP Phone Calls.................................................................73
Sample Topology ......................................................................................................................73
Inter-Cluster H.323 Communication.........................................................................................73
Call Flow Traces .......................................................................................................................74
Failed Call Flow........................................................................................................................75
Call Detail Records (CDRs and CMRs)........................................................................................77
Writing Records ........................................................................................................................77
Reading Records .......................................................................................................................77
Removing Records....................................................................................................................78
Table Schema............................................................................................................................78
Known Issues ............................................................................................................................79
IP to Device Name Translation .............................................................................................79
OnNet vs. OffNet ..................................................................................................................79
OffNet Digits Dialed .............................................................................................................79
Fields in a Call Detail Record ...................................................................................................79