Panasonic KX-FM131AL, Service Manual

Page: 50 / 232

4. The unit can copy, but cannot transmit/receive.
5. The unit can copy, but cannot either transmit/receive long distance or international communications.
The following two causes are conceivable regarding this symptom.
Cause 1:
The other party is executing automatic dialing, the call has been received by this unit, and the CED or DIS signal response
time is too long. (In most cases, this unit detects the CNG signal and can respond to CED or DIS.) (According to the ITU-
T standard, the communication procedure is cancelled when there is no response from the other party within 35 sec, so that
the other party releases the line.)
(Cause and Countermeasure)
As shown in the chart above, the total handshaking time must be reduced, but because of the long distance connection and
linking of several stations, the line connection time cannot be reduced. Accordingly, the following countermeasures should be
tried.
(A)... As the 35 sec. count is started directly after dialing or directly after the START button has been pressed for models with
a START button, the other party should be called manually, if possible. Another possibility is entering two pauses at the end of
the auto dial number on the transmission side. Then the count start time can be delayed for 2 pauses (about 10 sec.).
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KX-FP121AL / KX-FM131AL