Panasonic KX-T4300BA - Manual (Page 58)

Troubleshooting guide
Sound flutters or fades.
—You are too far from the base unit. Approach it.
—Extend the antennas of the base unit and the portable handset fully.
I am encountering interference from anotfier unit.
—Select another channel, (p. 28)
—Set the portable handset and the base unit away from other electric
appliances.
When I press the TALK button to make a cal!, 3 beeps sound and
dial tone is not heard.
—Approach the base unit and try again.
—Place the portable handset on the base unit and try again.
—Make sure that the AC adaptor is connected.
The portable handset does not ring.
—The POWER/RINGER switch is in the OFF position. Set to the ON
position.
When 1 press the INT7PAGE button, 3 beeps sound and paging
cannot be done.
—Someone is operating the answering system.
—You are too far from the base unit. Approach it.
I cannot page the portable handset from the base unit.
—Paging cannot be done while the base unit is receiving an incoming
call or recording some messages.
—Set the POWER/RINGER switch to the ON position.
I cannot store a phone number into memory.
—You cannot store the number into memory while the unit is in the talk
mode or in the intercom mode.
—Do not pause for over 30 seconds while storing.
While storing the phone number, the unit starts to ring.
—You can answer the call by pressing the TALK button. The program
will be canceled: store the phone number again.
A beep sounds every 15 seconds during a conversation.
—Charge the battery fully, (p. 53)
While having an intercom call, two tones are heard.
—Someone is calling you from outside. Press the TALK button to
answer the outside call. Intercom call is terminated.