Generally you can use 'show sip register stat' to see what is registered. 'debug ccsip messages' lets you know what the SIP message are ( SIP is easy to read, like HTTP).
Sometimes you have to do an outgoing calling number translation so that all calls have an originating number of the number you're registering.
You will generally configure rtp-nte as your DTMF option.
hth,
nick
Learn, share, save
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.