Core Issue
Cisco IP Phones 7940 and 7960 are configured with two lines. When the user is engaged on the first line and a call comes on the second line, the caller ID for the second call is not displayed. The second call is indicated by a single tone and a small indication on the line.
This issue is described in these Cisco bug IDs:
- CSCdw86063: Caller ID in the second line is not displayed
- CSCdw26479: Calling Line ID (CLID) is not showing up on 794x/6x when Call Forward Display (CFWD) to the same device
- CSCdu37305: 7940/60 - No caller ID and notification in the second line
Resolution
The resolution is available in these Cisco CallManager releases:
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
IP Phones and Clients
IP phone faulty operation
Failure Type
Missing information: feature, item, file, field, number, parameter, data, settings, configuration, option, etc.
Nothing displays: Not displayed, generated, created, etc.
When Problem Occurs
Part of call
End Where Problem is Heard or Device Type Involved
IP phone
Bug ID Number
CSCdw86063
Call Presentation
Calling line identification (CLID)
User Features
Second line
CallManager Versions
CallManager 3.3
CallManager 3.0
CallManager 3.1
CallManager 3.2
IP Phone Models
7940G
7960 series
