CallBlocker
Prevents annoying unwanted calls.
Platforms: Windows 95/98/Me/NT/2000/XP Size: 4.68 M Cost: $32
Buy full version
Trial version
Publisher: Greg Nelson 
Descriptions
CallBlocker:
Quietly runs in the background. Quickly monitor incoming calls. All calls are logged and list can be printed. Enter in your own custom blocking criteria or use the default settings.
Blocked calls only ring once informing you of the blocked call. Turn call blocking on or off at any time.
Must have a Caller ID compatible modem (most new ones are) and also Caller ID service on the phone line near the computer.
Free online support.
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