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How can I change the Outgoing Caller ID Set in Cisco Unified Call Manager? (External Phone Number Mask)

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Last Modified: 2016-10-18
I'm managing a Cisco VOIP system with CUCM version 6.1.2. I've inherited the system and only know my way around the phone level.

Our default Caller ID (or should I say External Phone Number Mask)  (i.e. when call an external number) is set for all phones to be our main number. First Q - where is this value set?

We'd like to set about 80 of our phones to a mask of 123-456-XXXX with XXXX being the extension number. Then we have about 20 phones that aren't direct dial numbers that we'd like to set to 123-456-6000 (our main number), or even better, 123-456-6000 xXXXX. All of our lines currently have the External Phone Number Mask set to 123-456-XXXX, but clearly there is a global setting that takes precedence.

thanks

Right now we get a lot of calls back to the main number - did you call me? Who called me? and our receptionist can't tell them. I realize that there are human fixes to this problem of course.

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