COPYRIGHT © 2002 CANON INC.
2000 2000 2000 2000
CANON iR1200/iR1300 Series REV. 0 AUG. 2002
7-73
CHAPTER 7 TROUBLESHOOTING
Cause:
Remedy:
Cause:
Remedy:
##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
The line condition is poor, and the other party cannot receive PPS-NULL cor-
rectly.
1. Increase the transmission level so that the other party may receive PPS-NULL
correctly.
2. Adjust the NL equalizer so that the other party may receive PPS-NULL cor-
rectly.
3. Add an echo protect tone to the V.29 modem signal for transmission.
The line condition is poor, and the significant signal cannot be received correctly.
Ask the operator of the other party to increase the transmission level so that the
signal may be received correctly.
Cause:
Remedy:
Cause:
Remedy:
##752 [TX]
In ECM transmission, DCN was received after transmission of
PPS-NULL
The line condition is poor, and the other party cannot receive PPS-NULL cor-
rectly.
1. Increase the transmission level so that the other party may receive PPS-NULL
correctly.
2. Adjust the NL equalizer so that the other party may receive PPS-NULL cor-
rectly.
3. Add an echo protect tone to the V.29 modem signal for transmission.
The Stop key was pressed during a communication.
Transmit once again.
##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:
Remedy:
Cause:
Remedy:
In phase 3 or phase 4, the other party cannot receive the signal correctly, and dis-
connect the line.
(1) Increase the transmission level so that the other party may receive the signal
correctly.
(2) Prohibit the V.8/V.34 procedure.
In phase 3 or phase 4, the signal from the other party cannot be received correctly.
(1) Ask the operator of the other party to increase the transmission level so that
the signal may be received correctly.
(2) Prohibit the V.8/V.34 procedure.
