The OS versions are based on a version number (ex. 2000-4-4a, 2000-4-5a, 2003-1-2), and a Service Release number (ex. SR2, SR6, SR3a).
Generally speaking, it is recommended to stay up to date on the Service Releases available for the OS version you currently have. At the time of this writing, the most current SR for 2000-4-4a is SR10.
There would be no harm in upgrading the OS version to the next level (2000-4-5a), however it is not required, especially as long as Service Releases continue to be released for your current OS version. If you want to see further information about what is new in the next OS version, find the README file for the *base* OS version you want to investigate.
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...