AT&T 874 - Manual (Page 26)

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If this telephone does not work properly, try the following suggestions. If
you’re still having problems, call 1 800 222–3111.
No Dial Tone
• Make sure all plugs are connected properly. Inspect the line cord
connections at the modular jack and at the telephone. Also inspect the
coiled handset cord connection at both ends.
• Check to make sure the phone is not on hold.
Call Cannot Be Dialed or is Dialed Slowly
This product comes set to touch tone mode. If you have dial pulse (rotary)
dialing service, you cannot dial numbers with the phone set to touch tone.
See the TELEPHONE FEATURE SETUP section of this manual to set the dial
mode to pulse.
Interference on Intercom or Phone Calls
This phone uses sensitive circuitry that may pick up interference in
environments with excessive electrical noise. To minimize interference,
keep electrical noise sources away from telephone wiring and sets.
Telephone Lights Flutter Continuously
• Power may have been interrupted.
• If AC power is controlled by a wall switch, make sure the switch is
turned on.
• Check the power cords on all system phones, and check the fuse or
circuit breaker that serves the phones.
• Check the telephone jack by disconnecting the 874 and connecting
another non-system telephone.
• Check that all line assignments are correct, and that all 874 phones are
on the line designated as Line 1.
Difficulty Storing Numbers in Memory
• Make sure you are pressing the correct sequence of buttons for storing
one-touch and two-touch numbers.
• Make sure the telephone is idle while you are storing numbers. If you
lift the handset or press
K while storing numbers, the number will
be entered incorrectly.
IN CASE OF DIFFICULTY