AT&T 7710 - Manual (Page 10)

Changing Channels
This cordless telephone has a an advanced 25-channel AutoSelect
feature that minimizes the chance of interference.
In the unlikely event that you notice noise or interference while
using the handset:
1 Press
C.
2 If the interference does not clear, continue to press
C until you find a clear channel (your call will
not be interrupted)
— OR —
Move closer to the base and press
C.
NOTE: You must be in range to change channels.
O P E R A T I N G R A N G E
9
This cordless telephone operates at the maximum power allowed
by the Federal Communications Commission (FCC). Even so, the
handset and base can communicate over only a certain distance —
which can vary with the locations of the base and handset, the
weather, and the construction of your home or office.
If the handset is moved to a point where the base and handset can
no longer communicate, the handset will sound two short beeps
when you make a call, indicating that you are out of range. Move
closer to the base to restore normal operation.
If you receive a call while you are out of range, the handset might not
ring — or if it does ring, the call might not connect when you press
P. Move closer to the base, then press P to answer the call.
If you move out of range during a phone conversation, you will hear
noise or interference. To improve reception, move closer to the base.
If you move out of range while on a call, the phone will be left “off
the hook.” To hang up properly, walk back into range, periodically
pressing
P until the PHONE light goes off.