Well, I personally don't trust the concept, because there is so much that can go wrong, and Cisco sort of implies that you should not use this for critical communications, but they have this document that describes what is available, they call it V3PN:
We use Checkpoint NG for the VPN connection and IP Communicator for the VoIP portion. Works great. OCYMMV. We are also using a AT&T (SBC) product called RLAN which using DSL makes the home location appear to be on the internal LAN. We've had a few hiccups implementating it, but it does seem to work.
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...
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 discusses the bas...