This is for a CCME installation in the UK. PSTN access is provided over exchange lines over 4 x FXO ports. Users have Cisco 7961 IP Phones.
When user dial out, the Caller-ID displays.
Incoming calls do not display Caller-ID. (They are displayed as unknown) even though I have configured 'caller-id enable' under the FXO ports (see below):
supervisory disconnect anytone
connection plar 3638
description PSTN Exchange Line (FXO)
How can this problem be resolved?