If you have Caller ID activated and still don’t get Caller ID, look at the ZAP configuration file. Typically you may have to look at zapata.conf and/or zapata-auto.conf. You may need to set the following switches in your zapata.conf and zapata-auto.conf:
zapata-auto.conf
The following switches may need to be added to the existing ones.
useincommingcalleridonzaptransfer=yes
adsi=yes
sendcalleridafter=2 ;you may need to add this switch
After the above are done, restart PiaF: amportal restart