Core Issue
The calling party name is only supported across ISDN connections.
Resolution
To check whether the calling name information is being received from the Public Switched Telephone Network (PSTN) and PBX, choose from one of these options:
- For Skinny and Media Gateway Control Protocol (MGCP) gateways, follow the instructions for gathering traces as described in Set Up Cisco CallManager Traces for Cisco Technical Support and search for the string CallingPartyName=.
If no calling party name is displayed, contact your Telco or service provider. If an error message is received after the IsdnMsgData1 is received, the calling party name may not be in the form of a Display IE and Cisco CallManager will not accept it.
- For H.323 gateways, check if the calling name is present in the Q.931 SETUP received from the PBX or PSTN by issuing the debug isdn q931 command.
If the calling party name is not present in the received SETUP, contact your Telco or PBX vendor. If a name is displayed in the Q.931 SETUP, but it is not in the form of a Display IE, Cisco CallManager will not accept it.
For more information, refer to Caller ID Name Delivery Issues on Cisco IOS Gateways.
Problem Type
Call connection (Connection quality: One-way audio, no busy tone, dropped calls, etc.)
Call control software (CallManager, CallManager Express, ICS7750, SRST, SS7 call agents)
Call Control
CallManager
Call Connection
Call presentation
CallManager Features
Call presentation
Failure Type
Missing information: feature, item, file, field, number, parameter, data, settings, configuration, option, etc.
When Problem Occurs
While call is connecting
End Where Problem is Heard or Device Type Involved
IP phone
Analog phone
Call Topology and Direction
PSTN/PBX/gateway > IP network
PSTN/PBX/gateway > IP network > PSTN/PBX/gateway
IOS Debug Commands
debug voip ccapi inout
debug isdn q931
Troubleshooting Tools
Traces
Call Presentation
Calling Party Name Identification (CNID)
