I have a question about Fax transmission over IP networks. If I configure as the following, what will be the FoIP packet size? I mean, what will be the compressed fax_data packet size?
Let the default codec is g729a (8Kbps>>12Kbps in real). And the fax call comes from voice port 1/0/0. I assume that the voice port adaptively decide on the incoming calls that the call is a voice conversation or the call is a fax message. Correct??
The router/gateway will act differently based on if you configure Fax Relay or Fax Passthrough. Don't forget to check the ability of all the gateways involved. Either way you have to use G711 for Faxes. Faxes will not work using G729a. Search CCO for information on Fax Passthrough. I've found that to work fairly well.
Just to warn you, Faxing is a trial and error process. Make sure you talk to TAC about which software versions work best for your hardware. You will get them working pretty good, but doen't expect things to work perfectly with every fax you send. One concept that Sales-people forget to mention is that analog devices such as faxes and modems are known to have problems in the VoIP world. As expected with the difference in technologies. Don't get me wrong, things are getting better as new loads and fixes become available.
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...