| Command | Purpose |
|---|---|
| debug ccsip messages | Shows the SIP messages being sent & received |
| debug gatekeeper call 5 | Shows gatekeeper call processing, including bandwidth requests |
| debug gatekeeper main 5 | Shows gatekeeper address resolution, including zone/prefix matching |
| debug h225 asn1 | Shows H225 messages being sent & received |
| debug isdn q931 | Shows ISDN Q931 messages, including calling & called number |
| debug ras | Shows summary of H225 RAS messages being sent & received |
| debug voice ccapi individual 2 | Shows a summary of call setup messages regardless of protocol, including calling & called number |
| debug voip ipipgw | Shows the CUBE processing, such as when it needs to invoke a transcoder |
Don’t forget to add voice iec syslog to your configuration too, this enables a lot of useful information to be logged.
