Fax Line Caller ID not showing DID number

[Chin Jam]

Hi Community,

I have a fax line connected to an FXS voice gateway port.  The caller ID from the ports to external number only shows the 4 digit number of the CUCM route pattern, not the full 10-digit DID.  My provider will be blocking any calls that do not show a valid DID in the SIP invite and have flagged this number.

The config on the voice gateway:

=======================================

voice-port 0/2/2
station-id name Sales Fax XXX-XXX-7725
station-id number 7725
caller-id enable

dial-peer voice 7725 pots
description Sales Fax XXX-XXX-7725
destination-pattern 7725
port 0/2/2

=======================================

In CUCM, I just have a route pattern configured for DN 7725.  Under Calling Party Transformations I have the following:

I've tried entering the number in the transformation mask field - still displays CLID 7725 on external calls

I changed the Calling Line ID presentation from Default to Allowed - no change

On the voice gateway I tried changing the Station-id number from 7725 to the full DID and the called failed from the fax machine:

config t
voice-port 0/2/2
station-id number XXXXXX7725

Where do I go to change the CLID from this fax machine to display the DID as the CLID not the DN?

Thanks - any help would be appreciated

[Prassha]

Hey Chin

Can you share the call flow and gateway type?

Let me know the router model and IOS version? or you can share the show running.

[Chin Jam · Accepted solution]

Hi Prassha,

Thanks for your reply.  I managed to find some documentation on the topic below:

https://www.cisco.com/c/en/us/support/docs/voice/analog-signaling-e-m-did-fxs-fxo/23444-callerid-name-del.html

I made a change to the voice-port config on the voice gateway.

Changed the station-id number from XXXX to XXXXXXXXXX which worked.

CJ