Caller ID not displayed on inbound calls

I’m just configured a Patton SN4120 ISDN Gateway trunk,
All seems to woks eccept that all inbound calls are displayed withou caller ID as “Anonymous”.
Any idea on how solve the issue and display the incoming CID number?
Thanks in advance.

I would start by “pri set debug on span 1” in asterisk to enable PRI debugging to see if you are getting the CID from the Gateway.

Look for lines containing “presentation:”