Caller Id not displayed for incoming calls

To display the caller Id your must :

Have the caller id service enabled on your phone line.
Have a voice modem capable of decoding UK caller id.
Ensure the modem driver correctly detects caller id.

To check if your modem detects caller id open the Phone and Modem Options dialogue (Start/Control Panel/Phone and Modem Options). On the 'Modems' tab, select the modem and select 'Properties'. On the 'Diagnostics' tab select 'View log'.

The log should contain information like that show below for an incoming call.

12-22-2006 09:25:51.531 - Interpreted response: OK
12-22-2006 09:33:57.796 - Recv: RING
12-22-2006 09:33:57.796 - Interpreted response: Ring
12-22-2006 09:33:57.796 - Recv: MESG =
12-22-2006 09:33:57.796 - Interpreted response: MESG
12-22-2006 09:33:57.796 - Recv: 110101
12-22-2006 09:33:57.796 - Recv:DATE=
12-22-2006 09:33:57.796 - Interpreted response: DATE
12-22-2006 09:33:57.796 - Recv: 1222
12-22-2006 09:33:57.796 - Recv: TIME=
12-22-2006 09:33:57.796 - Interpreted response: TIME
12-22-2006 09:33:57.796 - Recv: 0933
12-22-2006 09:33:57.796 - Recv: NMBR=
12-22-2006 09:33:57.796 - Interpreted response: NMBR
12-22-2006 09:33:57.796 - Recv: 01234-567890
12-22-2006 09:34:00.796 - Recv: RING
12-22-2006 09:34:00.796 - Interpreted response: Ring

If modem returns the caller id as "NMBR=01234-567890" then the modem supports caller id but you need to ensure this is correctly decoded and processed by the modem driver as above, as many drivers contain errors in their configuration for caller id. Often spaces are misplaced in the modem driver configuration for the MESG response, resulting in an "invalid response" message and the caller id being ignored. The .INF file for your modem driver controls the decoding of the modems responses. An extract of the .INF is shown below :

HKR,Responses,"DATE=",1,93,00,00,00,00,00,00,00,00,00
HKR,Responses,"TIME=",1,94,00,00,00,00,00,00,00,00,00
HKR,Responses,"NMBR=",1,95,00,00,00,00,00,00,00,00,00
HKR,Responses,"NAME=",1,96,00,00,00,00,00,00,00,00,00
HKR,Responses,"MESG = ",1,97,00,00,00,00,00,00,00,00,00

Check that these strings match those returned by your modem. Often MESG is incorrectly specified in the .INF file as "MESG=" instead of "MESG = ". You can try obtaining an updated driver for your modem or change the .INF file yourself. If you change the .INF file you must change it in the original driver installation files (often packed in a .cab) and re-install the driver.

Return to support page