Not knowing exactly what you want to do, it's difficult to say, however I would begin with you can't.
Quite simply you have to specify a destination for the incoming call which must valid.
There are 2 options,
1) point the call at an IVR and configure the IVR with a message which is recorded dial tone. You then need to configure the IVR with a menu that responds to the possible destinations dialed by the caller.
2) do not configure Direct-inward-dial on the port on the router, and do not specify a destination in a dial-peer. I know this will give you dial tone but I'm not sure where you can then dial on to.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
[toc:faq]CUCM Database Replication is an area in which Cisco customers
and partners have asked for more in-depth training in being able to
properly assess a replication problem and potentially resolve an issue
without involving TAC. This document discusse...