Caller ID is a TAPI (Windows Telephony API) application. This means TAPI is used to communicate with your modem.
For the caller ID information to be
retrieved by Audio Caller ID you must subscribe to the
caller ID service with your local telephone company, your
modem must support caller ID, and your modem driver must
be TAPI compliant. If you are not receiving caller ID
information all calls will be displayed as Unavailable. The TAPI compliant driver is most often the source of
caller ID information not being reported. Many of the
standard Windows modem drivers will not report caller ID
information. You will want to install the driver from
your modem manufacturer. Visit the web site of your modem
manufacturer to see if they have an updated driver
Here is a list of things
to check if Audio Caller ID is not reporting caller ID
- Your phone line is
plugged into your computer's modem
- You are subscribed to
the caller ID service with your phone company on
- You are not using this same modem to
connect to the internet at the same time you are trying to receive a
call. (Modems can't receive CID information while the modem is
- Make sure your modem
supports caller ID by checking the documentation
that came with your modem or by viewing our list
of known supported modems.
- Check for and install
the latest version of your modem's driver. These
can usually be downloaded directly from your
modem manufacturer's web site.
sure the caller ID feature of your modem is
- Manually verify that your modem is
receiving caller ID information.