Hello. I am very thankful to have you reading my post and thanks beforehand to everyone helping around. You are doing a great job.
I am currently configuring a CUCM cluster.
Problem is as follows.
We have a standalone cluster with a Publisher and Subscriber
We have a PRI line with head-end number 2046800 configured on an MGCP gateway (2821 router)
The DID range for this line is 204-6100 to 204-6899.
Extensions to each IP phone have been assigned in the format 6yxx, where y is a number between 1 and 8, and x can be anywhere from 0 to 9.
Thus all internal extensions are 4 digits long and corresponding external number is the same extension prepended with 204; e.g:
extension 6100 (internal) maps to 204-6100 (external)
This setup is functionning normally as should and all users are able dial in and out using their DIDs.
Eg: If I call 204-6123, extension 6123 will ring inside and;
if extension 6123 calls me on my landline, the caller-id of 203-6123 will appear on my phone.
The problem is as follows:
The management has decided that it will keep only the last 3 digits as extension number:
Hence the leading "6" will be opted out for all extensions.
All new extensions will be within the range 100 to 899
I have already tried creating extension number 101 and assigned it to a phone to test.
Problem(a): The phone loses its DID, that is, outgoing calls proceed with the Head-number which is 204-6800, incoming and 204-6101 gets a "no answer"
on the caller side.
As solution, I have tried
(1) to create a transformation pattern from 101 to 6101. By this, it was expected that calls to 204-6101 from an external
landline would ring on extension 101.
This was not the case. The problem remains the same as described above in problem(a)
I know this might be a very small issue and I am missing something somewhere. The reason being I am really new to CUCM and weak in translation stuff.
Can you suggest a solution please?
Under the Route Pattern on CUCM ,under the Calling Party Transformations ,check the box that says use calling Party`s External Phone number Mask ,just make sure that yoy still have the External Phone number mask configured under the Line config on the Device Profile ,also have you spoken to the Telco to make sure they are not masking the number on their side ?
No worries glad to help ,you might just want to change the Translation Pattern to include the whole number range ,so for instance if your number range is 4000-4100 i would make the TP 4XXX and make the Called Number Transform XXX ,this should then change the 4 digit number into a 3 digit number ,using the last 3 digits
Sure ,the Translation pattern will be the number that the Telco sends to you ,eg 7101 ,then at the bottom of the Translation Pattern Page make the "Called Party Transform Mask" 101