Panasonic KX-FT21BX Service Manual page 75

Modem test
(TEST CODE NO.554)
4
Inquire with the receiver if the
caller's document has been sent
correctly.
Is the data sent correctly?
YES
Ask the service section for the
receiver's FAX machine to con-
firm the machine condition.
5
3.1
6
Perform the communication test
us-ing the LOOP simulator and
check the machine reception
condition.
YES
Is FTT sent from the receiver?
NO
No problem with the machine hardware.
Perform voice communication
with the NG caller.
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.
- 49 -
No response after the post message is transmitted
three times.
RTN and PIN are received.
No response after FTT is transmitted.
6.1
KX-FT21LA
NO
3.2