If both ports are on the same DSP backplane, and they aren't MGCP, we won't even invoke a DSP for the call, so fax over IP configuration is irrelevant. That's the easy configuration. You just need two POTS dial-peers, and that's it.
If the ports are on different DSP backplanes (i.e. one of them is on an NM with DSPs) then a DSP will be invoked and it will trigger some sort of fax switchover. In this scenario, it is often beneficial to configure 'voice service pots/fax rate disable' to prevent it from going to cisco fax relay on the POTS to POTS call.
If you do need to intentionally invoke a fax protocol, I'd recommend modempassthrough when going between two Cisco decices on the same LAN since that supports high speed fax.
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...