T1 Timer: No.11 Of Service Soft Switch #3 Numeric Param; Rtn Signal Transmission Condition: No. 02, 03, And 04 Of Service Soft Switch #3 Numeric Param; Echo Remedy; Echo Protect Tone: Sw03 Bit - Canon iR1200 Series Service Manual

CHAPTER 7 TROUBLESHOOTING

4.5.3.5 T1 Timer: No.11 of Service Soft Switch #3 NUMERIC param.

• Increase the T1 timer setting:
Increase the setting of No.11.
The T1 timer is used to set the period of time in which a line connection is recognized
for reception, i.e., in which the machine waits for a significant signal from the other party
after transmission of DIS. The line will be disconnected if no significant signal is received
during the period.
4.5.3.6 RTN Signal Transmission Condition: No. 02, 03, and 04 of Service Soft
Switch #3 NUMERIC param.
• Loosen the RTN signal transmission condition:
Increase the settings of No.02, 03, and 04.
No.02 is used to set the ratio of the number of error lines to the total number of lines per
page (1% to 99%).
No.03 is used to set the burst error (number of successive error lines identified as an er-
rors) ; (2 to 99 lines).
No.04 is used to set the number of errors falling short of a burst error (1 to 99 times).

4.5.3.7 Echo Remedy

• An echo remedy may be provided on the reception side as follows:
Echo Remedy 1 (by the receiving machine; adds a 1080-Hz tonal signal before
transmission of CED):
Set SW03 bit 7 of service soft switch #1 SSSW to '1' so that a 1080-Hz tonal signal is
transmitted before transmission of CED.
Echo Remedy 2 (by the receiving machine; changes the period in which the low
speed signal is ignored after transmission of CFR):
Set SW04 bit 4 of service soft switch #1 SSSW to '1' so that the period in which the
low speed signal is ignored after transmission of CFR is changed from 700 to 1500 msec.
4.5.3.8 Echo Protect Tone: SW03 bit 1 of Service Soft Switch #1 SSSW
• Add an echo protect tone to the V.29 modem signal for transmission:
When SW03 bit 1 is set to '1', an echo protect tone will be added to high-speed trans-
mission V.29 (at 9600 or 7200 bps) for transmission.
4.5.3.9 Number of Final Flag Sequences: SW04 bit 2 of Service Soft Switch #1

SSSW

• Increase the number of final flag sequences:
When SW04 bit 2 is set to '1', the number of final flag sequences will be increased from
1 to 2 for a procedure signal (transmitted at 300 bps).
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COPYRIGHT © 2002 CANON INC. 2000 2000 2000 2000 CANON iR1200/iR1300 Series REV. 0 AUG. 2002