Canon iR1200 Series Service Manual page 389

##754 [TX] In ECM transmission, the allowed number of procedure
signal retransmissions was exceeded after transmission
of PPS-NULL
Cause: The line condition is poor; as such, although PPR was received 4
times after transmission of PPS-NULL and then CTC was
transmitted, no significant signal was received correctly thereafter.
Remedy: Ask the operator of the other party to increase the transmission
level so that the signal may be received correctly.
##755 [TX] In ECM transmission, no significant signal can be
received after transmission of PPS-MPS, and the
allowed number of procedure signal re-transmissions
was exceeded
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 correctly.
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 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.
##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 correctly.
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.
T-14-68
T-14-69
Chapter 14
14-33