At this moment, the CallsId has been tested on Windows XP/32-bit with Service Pack3 and on Windows Vista/32-bit.

Ιn order to be functional the caller id feature the following are required:

• PSTN telephone line with caller id service enabled from your telephony provider.
• Dial-Up modem with caller id function support.

or

• ISDN telephone line with ISDN TA (terminal adapter).

• At least 15MB free disk space (for initial installation).