Mike is referring to the following section of the trunk configuration:
Hope this helps,
1)For Outbound call You can find the settings in CUCM Trunk/Gateway Page labeled as "Calling Party Transformation CSS". By Default Use Device Pool Calling Party Transformation CSS is enabled.
2) For Incoming Call it is not labeled as "Calling Party Transformation CSS" Instead it just Says CSS, but that is the one you should use and uncheck the Use Device Pool Setting
3) Below are the Additional Details for these parameters
4) Details of these Parameters
Hope that Helps
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If this requirement for call routing, then uses "Significant Digits All" to 3 to collect only last 3 digit - Option under inbound call session in the Trunk/Gateway configuration page.
If it for only CLID presentation, then use the method by the previous post and use the CSS option as mentioned by Hariss.
The css solution is working for me , but the on top it is showing the full number like 1234567 and below it is showing the number 567 after the transformation mask applied .
When you configure the SIP trunk in Cisco communication manager; you find the Inbound Call Routing Configuration under the session Inbound Calls.
Under the session Inbound Calls:
Significant Digits - if you mention 3 - then the communication manager accept only last 3 digits and it looks for any dial pattern that matches this 3 digit with the CSS mentioned below and performs the call routing accordingly.
Calling Search Space --> this is the key CSS for call routing for your inbound calling number.
In your case, if the remote party called to 798687989, the call manager will take only 989 and look for the pattern that matches 989 and route the call accordingly.
The other two sessions (Incoming Calling Party Settings and Incoming Called Party Settings) used for digit transformation.
The incoming calling party and called party session will decide what the system required to perform the digit transformation.
When you use the calling search base in this session - Make sure that the calling party transformation CSS that you choose contains the calling party transformation pattern that you want to assign to this device.
I believe I am not making you confuse here.
To help you further, It will be great if we can look into your configuration. could you please share all the configuration related.
How the call manager know, it should take only 989
2) I have created a calling party transformation mask to mask from 798687989 to 8989 and assigned
and now the problem is , on the phone display when call receiving from the number798687989 it shows like below ( on top the full number and just below the number after transformation mask ) .
What could be the reason