Canon SmartBase PC1200s Service Manual page 354

CHAPTER 7 TROUBLESHOOTING
##757 [TX] In ECM transmission, DCN was received after transmission of
PPS-MPS
Cause: The line condition is poor, and the other party cannot receive PPS-MPS correctly.
Remedy: 1. Increase the transmission level so that the other party may receive PPS-MPS
2. Adjust the NL equalizer so that the other party may receive PPS-MPS correctly.
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.
##758 [TX] In ECM transmission, the allowed number of procedure signal re-
transmissions was exceeded or a T5 time-over (60 sec) condition
occurred after transmission of PPS-MPS
Cause: The page buffer of the other party is full or is engaged; as such, although RNR
was received after transmission of PPS-MPS and then RR was transmitted, no sig-
nificant signal was received correctly thereafter.
Remedy: 1. Start G3 mode, and transmit once again (Prohibit the ECM mode).
2. Decrease the transmission start speed.
3. Record the protocol on a DAT or MD, and have it analyzed by the local Canon
##759 [TX] In ECM transmission, the allowed number of procedure signal re-
transmissions was exceeded after transmission of PPS-MPS
Cause: The line condition is poor; as such, although PPR was received 4 times after trans-
mission of PPS-MPS and then CTC was transmitted, the other party could not re-
ceive it correctly.
Remedy: Increase the transmission level so that the other party may receive CTC correctly.
Cause: The line condition is poor; as such, although PPR was received 4 times after trans-
mission of PPS-MPS and then CTC was transmitted, no significant signal was re-
ceived correctly thereafter.
Remedy: Ask the operator of the other party to increase the transmission level so that the
signal may be received correctly.
7-72
COPYRIGHT © 2001 CANON INC.
correctly.
office and/or Technical Center.
2000 2000 2000 2000 CANON SmartBase PC1200s/iR1200s REV. 0 DEC. 2001