TELEPHONE OPERATION
PROBLEM SOLUTION
LINE Lights Remain • Make sure the phone is programmed
On When No Line is for that line to be absent. (See “Turn
Connected Line Usage On or Off for Each Line”
on page 31.)
• Make sure that your Line Groups are
programmed properly. (See “Assign the
Line Group for this Phone” on page 39.)
• Disconnect all other devices (fax, modem,
credit card reader, etc.) from any lines
connected to your 974 phone. These
devices can interfere with the telephone’s
data links.
• Make sure the total length of telephone
wiring used in your phone system is less
than 600 feet. In some cases a Z800A
filter can be used in a phone system with
more than 600 feet of wire. AT&T highly
recommends that a Z800A filter be installed
by a professional. AT&T CANNOT
guarantee that this telephone will work
with such a filter, and IS NOT responsible
for such installations. A Z800A filter can
be obtained by calling 800 222-3111.
(See “DSL Users” beginning on page 4 for
details.)
PROBLEM SOLUTION
Tone Signals Do Tone signaling does not work during
Not Activate a conference calls.
Remote Device
90
IN CASE OF DIFFICULTY
IN CASE OF DIFFICULTY
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