Canon iR1200 Series Service Manual page 377
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##675 [RX]
In V.34 reception, the procedure fails to move from phase 3 or
phase 4 to a control channel or later, causing a T1 time-over condi-
tion
Cause:
In phase 3 or phase 4, the other party cannot receive the signal correctly, and dis-
connect the line.
Remedy:
(1) Increase the transmission level so that the other party may receive the signal
(2) Prohibit the V.8/V.34 procedure.
Cause:
In phase 3 or phase 4, the signal from the other party cannot be received correctly.
Remedy:
(1) Ask the operator of the other party to increase the transmission level so that
(2) Prohibit the V.8/V.34 procedure.
##750 [TX]
In ECM transmission, no significant signal can be received after
transmission of PPS-NULL, and the allowed number of procedure
signal re-transmissions was exceeded
Cause:
The line condition is poor, and the other party cannot receive PPS-NULL cor-
rectly.
Remedy:
1. Increase the transmission level so that the other party may receive PPS-NULL
2. Adjust the NL equalizer so that the other party may receive PPS-NULL cor-
3. Add an echo protect tone to the V.29 modem signal for transmission.
Cause:
The line condition is poor, and the significant signal cannot be received correctly.
Remedy:
Ask the operator of the other party to increase the transmission level so that the
signal may be received correctly.
##752 [TX]
In ECM transmission, DCN was received after transmission of
PPS-NULL
Cause:
The line condition is poor, and the other party cannot receive PPS-NULL cor-
rectly.
Remedy:
1. Increase the transmission level so that the other party may receive PPS-NULL
2. Adjust the NL equalizer so that the other party may receive PPS-NULL cor-
3. Add an echo protect tone to the V.29 modem signal for transmission.
Cause:
The Stop key was pressed during a communication.
Remedy:
Transmit once again.
COPYRIGHT © 2002 CANON INC.
correctly.
the signal may be received correctly.
correctly.
rectly.
correctly.
rectly.
2000 2000 2000 2000
CHAPTER 7 TROUBLESHOOTING
CANON iR1200/iR1300 Series REV. 0 AUG. 2002
7-73
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Troubleshooting
