Disabling Call Waiting Call waiting can be disabled as follows: 1. Wait for dial tone, then dial *70. 2. Wait for confirmation (dial tone that goes bee-bee-beeeeeeeee). 3. Dial your number. The above procedure disables call waiting ONLY for the call you are making at that time. Put it in your autodialer for the program you use. (With a Hayes modem, that would be ATDT*70,,xxx-xxxx.) If calling out on a "rotary" line (i.e. non-touchtone), use 1170 in place of *70. This only works for some telephone exchanges.