I'm deploying a CUCM 7.1.3 + Unity Connecion 7.1.3 to a customer, and I have a doubt when using overlapping extension. As it's a large environment, he has overlapping extension number in his multiple sites. For example, both SiteA and SiteB have the extension range 8XXX. In CUCM I have configured some translations patterns, so that an user from SiteA should dial 118XXX in order to reach SiteB, and an user in SiteB should dial 218XXX in order to reach site A. And each site has its own line partition to extension numbers. And everything works fine...
But these users are all in the same Unity Connection Server. So I would have users from SiteA and SiteB with the same extension in Unity Connection, and I can't do that. What I know can do is to configure some partitions from SiteA and SiteB in CUC, and put each subscriber in one partition, right?
But when a user wants to reach the voice mail to get his messages, how Unity Connection knows from which location is he?
Please, anyone could advise me how can I proceed with this configuration?
I have found a solution that seems to work well.
First you need to set the following Service Paramater > Call Manager > Multiple Tenant MWI Modes to TRUE.
Second Create a Partion PT_MWI_Trans
Make sure the Office's CSS has the new partition added to it
Then create a translation pattern that will discard the 3 digits when Unity tries to contact that extension.
Example(Users extension in CUCM is XXXX and users extension in Unity Connection is 560XXXX:
Translation Pattern: 560XXXX
CSS: Office CSS
Called Party Transform Mask: XXXX
Seems to be working, still in early testing though.
The answer is correct. There is no way to avoid overlap in Unity. Unity Connection has PT and CSS. (Which is a pain to setup). You would have to setup a vm profile for each overlap number so it changes when it hits Unity to a unique number. Also plan on PT/CSS to make it all work.
Id recommend take a deep look at your dial plan and start to plan on making adjustments where needed. e164, 7 digit, 10 digit, etc.....