Panasonic KX-FT21BX Service Manual page 74

KX-FT21LA
Modem test
(TEST CODE NO.554)
Perform the communication test
using the LOOP simulator.
YES
Is "Fall back" executed from
(1) Raise the level of transmission. (Do not
raise the level above the standard of each
country. If the communication is
OK at the level beyond the standard, it is due
to the line condition or the receiver's
machine sensitivity.)
If no effect is obtained:
(2) Slow down the transmission start speed
and transmit to the receiver again.
Is communication OK?
3.2
Ask the receiver to perform the
FAX communication from the re-
ceiver to the caller.
Is communication OK?
Perform voice communication
with the receiver.
Check if the line is not inter-
rupted by noises or cross talk.
If not, wait until the line is
satisfactory for correct com-
munication.
FTT is received after the transmission of a 2400BPS
3
training signal.
9600BPS?
NO
3.1
YES
NO
YES
NO
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If this error frequently occurs at
the receiver, perform transmis-
sion in the above mentioned
mode on the receiving side.
End