8 Dialer Installation & User’s Guide
Another approach is to program the dialer to listen for fax
CNG tones whenever you make a call. This works reliably,
but slows down every call you make with the dialer, so it's
only recommended if a high percentage of your calls are
with a fax machine.
1. Take a phone off-hook and dial
# * 7 1 # #
This programs the dialer to listen for fax CNG tones, and
to make sure that no dialing occurs during these tones.
Activating this feature will result in a delay of about 3.5
seconds before the dialer dials, even for non-fax calls.
2. To turn this feature off, take a phone off-hook and dial
# * 7 0 # #