Canon iR1200 Series Service Manual page 363

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.
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).
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.
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.
9Number 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).
Subaddress
A subaddress is used to indicate the location of a memory box in the other party (e.g., confidential mailbox, polling
box), and it consists of 20 or fewer characters (numerals, *, #, space). As log as the other party complies with the
International Standards of ITU-T, the machine can communicate with it by means of subaddresses.
At times, an ID number (referred to as a "password") is used to restrict access to a loca-tion indicated by a subaddress.
With some models, polling based on subaddresses is called "selective polling", and a subaddress used at time of
polling is called a "selective polling address".
Password
A password used by a Canon facsimile machine may be any of the following: Password for Subaddress
Communications: This is an ID number used for a subaddress communication and, as in the case of a subaddress, it
consists of 20 or fewer characters (numerals, *, #, space).
Communication Password:
This is an ID number used for a password communication. Some models use 4 decimal characters (0000 through
9999), while some use 3 decimal characters (000 through 255).
MEMO:
Chapter 14
14-7