If Cisco IP Communicator is behind a firewall, make sure that the firewall is configured to pass TFTP and RTP traffic using the appropriate port range. See the "Selecting an Audio Port Range"
You might need to select an audio port range for Cisco IP Communicator to use if the network uses a custom port range for RTP audio. For example, if a single port is opened to allow audio to pass through a firewall or if a quality of service (QoS) policy has been applied to only those routers and switches with a restricted range of RTP ports.
You can do this from Cisco Unified CallManager Administration: Phone Configuration > Product Specific Configuration panel. Alternately, users can do this from the Cisco IP Communicator right-click menu: Preferences > Audio > Network > Audio Port Range.
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...