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Passing telco CNAM through CUCM, UCCX and back out to PSTN

twilkerson3
Level 1
Level 1

Trying to find out if this is a possible scenario.  What I am trying to accomplish is this:

I have a DID that I had our telco provider update the CNAM to "Hospital A" (for example).  When I call out using that DID, the correct new Name shows as well as the "masked" phone number I set.

However, when I want to use that DID as a UCCX trigger, it shows the "masked" phone number but not the correct CNAM.  I am trying to use that DID for outbound calling for a UCCX call center (for spoofing purposes).  Our company supports many medical facilities and when an agent makes an outbound call using a Jabber phone with Finesse (agent desktop) to a patient, they want it to display for the medical facility the agent is calling on behalf of. So, the agent would dial the DID which hits an IVR on UCCX indicating to enter a 4-digit code - 2702 (which I have created the route pattern 2702.[2-9]XX[2-9]XXXXXX) and patient's 10-digit phone number.  The 4-digit code is used to match a specific route pattern where the CLID is masked. UCCX sends that 4-digit code and phone number back to CUCM to dial out a SIP trunk to our telco provider matching that route pattern.  Is it possible to pass the CNAM in this scenario?  I have played with the settings on the route pattern but no luck.

 

3 Replies 3

CNAM is based on the calling number and when you make the call from/via CCX it makes the call from a CTI port, so that port directory number is what CM would see as the calling number and likely that is what you’re sending to your service provider. Have you looked at the output from debug ccsip message to see what you’re sending to your service provider?



Response Signature


Thank you! I will turn on debugs on that SIP gateway and will find out what we are sending out to the carrier.

wajidhassan
Level 4
Level 4

Hi @twilkerson3 ,
You're on the right track, but there’s a limitation here — CNAM (caller name) isn’t passed from your CUCM/UCCX system out to the PSTN. CNAM is not part of the SIP signaling you send; instead, it’s looked up by the terminating carrier using the caller's number from an external CNAM database.

So, even if you mask the number correctly using route patterns and translation patterns, the CNAM shown depends on what your telco has associated with that number.

In short:

  • Yes, number masking via CUCM/UCCX works.

  • No, you can't dynamically change CNAM per call through CUCM.

  • You’ll need to ask your telco to assign the desired CNAM to each DID you plan to use for outbound masking.

Hope this clears it up.