how to trace the callingPartyNumber from CDR

[ccg-collab1]

Hi All,

We just want to trace how CDR get the data under callingPartyNumber. Upon checking, if the call is coming from the Cisco IP Phone going to another IP Phone or outside call (PSTN), the callingPartyNumber will still be the Directory Number of the IP Phone that initiate the call. Right? 

We have a setup wherein ININ is currently integrated with the call manager via SIP Trunk. When ININ user make an outgoing call using their ININ Softphone, we are getting always same number (One number) for the callingPartyNumber. With this, Am I correct to say that the calling party number we are seeing when ININ user make a call using the ININ Softphone was set to the ININ side? Since the call came from ININ -> SIP Trunk -> CUCM -> Route Pattern?

We are verifying this since we want to check if we can change that data to further identify every call coming from ININ. Kindly see below captured image from the CDR.

Thank you so much,

Kier 

[hsood]

Hi Kier,

Your understanding is correct.

callingPartyNumber for internal ip phone to ip phone calls would be having the information for the originating DN.

For the ININ setup, the information stored in the DN of the URI part of the From header of the SIP Invite will be taken as the  callingPartyNumber for the CDR.

Regards,

Hitesh

[ccg-collab1]

Hi Hitesh,

Great! Thank you so much for your response.For "the information stored in the DN of the URI part of the From header of the SIP invite will be taken as the callingPartyNumber", does it mean that this "From header of the SIP invite" is coming from ININ side? So if ever we need to see different calling party number for the ININ part, we need to ask ININ support to change the setting on their header of SIP Invite? or there is a way that we can control it from the CUCM side?

Thank you so much,

Kier

[hsood]

Yes,

Since it is a SIP trunk integration with CUCM and the ININ softphone shall be registered on their end, CUCM should ideally just be getting an Invite message from the ININ side with From and To headers and the CUCM is supposed to doing routing based on the To header of that Invite message.

I don't see an option as such to modify the From header unless you can have a Normalization script applied on the SIP trunk itself that can modify the From header but would that take care of the CDR callinpartynumber would be worth testing once.

Regards,

Hitesh

[ccg-collab1]

Hi Hitesh,

Thanks a lot for the information. As per checking, there is a normalization script that was set on the SIP Trunk between CUCM and ININ. 

With this I just need to check if the script really change the header of the SIP Invite, right?

Thank you,

Kier

[hsood]

Yes,

That would be it.

It could be possible that every other number is modified by the script already to show the calling number as  29765300.

Removing that part might perform the desired operation that you are looking for.