Cisco IP Telephony Troubleshooting Guide for Cisco CallManager Release 3.0(1)
© 2000 Cisco Systems, Inc.
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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
