Cisco IP Telephony Troubleshooting Guide for Cisco CallManager Release 3.0(1)

SC

CM

SC

 

Station OffHook

 

 

Station Display Text

 

 

Station Set Lamp (Steady)

 

Station Start Tone (Inside Dial Tone)

 

 

Station Keypad Button

 

 

Station Stop Tone

 

 

Station Keypad Button

 

 

Station Keypad Button

 

 

Station Keypad Button

Station Call Info

 

 

 

 

Station Set Lamp (Blink)

 

Station Call Info

Station Set Ringer (Inside Ring)

 

Station Off Hook

 

Station Start Tone (Alerting)

 

Station Set Ringer (Off)

 

 

 

Station Stop Tone

Station Set Lamp (Steady)

 

Station Open Receive Channel

Station Open Receive Channel

 

Station Call Info

 

Station Open Receive Channel Ack

Station Start Media Xmission

 

 

 

Station Start Media Xmission

Station Open Receive Channel Ack

 

 

 

User Information Exchange

 

Station Close Receive Channel

Station On Hook

 

Station Set Lamp (Off)

 

Station Stop Media Xmission

 

Station Close Receive Channel

 

Station Set Lamp (Off)

 

Station Stop Media Xmission

 

Station On Hook

 

 

Cisco CallManager Initialization Process

In this section the initialization process of Cisco CallManager will be explained with the help of traces that are captured from CCM1 (identified by the IP address 172.16.70.228). As described previously, SDI traces are a very effective troubleshooting tool because they detail every packet sent between endpoints. This section will describe the events that occur when Cisco CallManager is initialized. Understanding how to read the trace helps you to properly troubleshoot the various Cisco CallManager processes, and the effect of those processes on services such as conferencing, call forwarding, and so on.

The following messages from the Cisco CallManager SDI trace utility show the initialization process on one of the Cisco CallManagers, in this case, CCM1. Review the descriptions of each message below.

The first message indicates Cisco CallManager started its initialization process.

© 2000 Cisco Systems, Inc.

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Cisco Systems 30 VIP manual Cisco CallManager Initialization Process

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