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CHAPTER 7 TROUBLESHOOTING
##772 [TX]
In ECM transmission, DCN was received after transmission of
EOR-NULL
Cause:
The line condition is poor, and the other party cannot receive EOR-NULL cor-
rectly.
Remedy:
1. Increase the transmission level so that the other party may receive EOR-NULL
2. Adjust the NL equalizer so that the other party may receive EOR-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.
##773 [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 EOR-NULL
Cause:
The page buffer of the other party is full or is engaged; as such, although RNR
was received after transmission of EOR-NULL and then RR was transmitted, no
significant 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
##774 [TX]
In ECM transmission, ERR was received after transmission of
EOR-NULL
Cause:
The line condition is poor, and the other party cannot often receive the image sig-
nal correctly.
Remedy:
1. Increase the transmission level so that the other party may receive the image
2. Adjust the NL equalizer so that the other party may receive the image signal
Cause:
The other party malfunctioned because of an echo.
Remedy:
1. Using a manual call, press the Start button after hearing the 1st DIS from the
2. To prevent response to the 1st DIS from the other party, put a relatively long
3. Ask the operator of the other party to provide echo remedy 1.
4. Ask the operator of the other party to decrease the transmission level so that the
7-76
COPYRIGHT © 2001 CANON INC.
correctly.
rectly.
office and/or Technical Center.
signal correctly.
correctly.
other party.
pause to the telephone number when registering an auto-dialing number.
other party will not receive an echo.
2000 2000 2000 2000
CANON SmartBase PC1200s/iR1200s REV. 0 DEC. 2001
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Table of Contents
Troubleshooting
