Hide Caller ID from CUCM to PSTN

[George Paraschivescu]

Hi,

Is it possible to hide the caller ID from users that use CUCM when calling to the PSTN ? There should be a special code to use this feature, for example *2

Scenario:

  Auser dials a PSTN number: *200040771688133 from his office phone.

The PSTN user cannot see the caller's information on the display (private number).

Thanks,

George

[Jitender Bhandari · Accepted solution]

Hi George,

This cannot be achieved by single feature in CUCM, see if below works for you.

For outbound calls to PSTN under Route Pattern(RP) configuration under "Calling Party Transformations" Play with below

Calling Line ID Presentation

Cisco Unified Communications Manager uses calling line ID presentation (CLIP/CLIR) as a supplementary service to allow or restrict the originating caller phone number on a call-by-call basis.

Choose whether you want the Cisco Unified Communications Manager to allow or restrict the display of the calling party phone number on the called party phone display for this route pattern.

Choose Default if you do not want to change calling line ID presentation. Choose Allowed if you want Cisco Unified Communications Manager to allow the display of the calling number. Choose Restricted if you want Cisco Unified Communications Manager to block the display of the calling number.

Also for Code you will have to apply FAC on that RP, for details see below.

https://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-communications-manager-callmanager/81541-fac-config-ex.html

Keeping in mind if users are not able to put correct FAC the call would not go through at all.

(Rate if it helps)

JB

[George Paraschivescu]

Thanks Jitender Bhandari !

I was able to test it in our test system so far.

I just copyed an existing translation profile and added *2 before it as a code.

After that i modified under translation pattern config > Calling party transformation > calling line id presentation and calling name presentation to restricted.

So now the old translation pattern and the new translation pattern point to the same route pattern but one allows the caller id and one not.  Pretty easy :)

[Jitender Bhandari]

Hi George,

Happy to help.

Sounds good that you were able to test it in your LAB, i would still suggest you to make a specific Route Pattern in your production like 91.408895XXXX replace XXXX with an exat number. You can create one for your mobile number for testing, the reason why i would like you to test this way before going for full fledge deployment is sometime when you are restrict CLID service provider would reject your call (Again it can differ service provider to SP).

(Rate if it helps)

JB

[Chris Deren]

Yes, you can build specific route patterns for that with Calling Line and Calling Name presentation set to Restricted.