It kind of depends on your system design. You could do it at the Route Pattern by modifying the "Prefix Digits (Outgoing Calls)" field under Calling Party Transformations.
The other option is to use the BAT feature, but if you have any External Phone Number Masking it would be erased. Not sure about your system or version... In my CUCM 7x environment I would go to Bulk Administration -> Phones -> Add/Update Lines -> Update Lines. Then I would find whatever I needed to modify and only edit the External Phone Number Mask field. Remember to check the box to the left too.
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...