Unable to see the caller name on the IP phone for inbound calls on Cisco CallManager Express with the PRI . On a Cisco CallManager Express, the phone number of the caller appears on inbound calls for the Primary Rate Interface (PRI), but the name of the caller does not appear.
Caller ID in ISDN Network
ISDN networks, caller ID (sometimes called CLID or ICLID for incoming calling line identification) is a feature offered by a central office (CO) to supply calling party information to subscribers. Caller ID allows the calling party number and name to appear on a device such as a telephone display.
Issue in displaying the Calling/Caller Name on the IP Phone for Inbound calls when the Device Type is PSTN/PBX or voice gateway connected in the network.
Call flow and Direction:
PSTN/PBX/gateway > IP network CME with PRI connected. In order to fix the problem, use the isdn supp-service name calling command in interface configuration mode under pri D channel interface..
To enable the display caller-name identification for calls that originate on an ISDN network, perform the following configuration under the D channel serial interface.
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