Canon Super G3 Fax Board-AF1, Service Manual

Page: 45 / 74

Chapter 5
5-3
5.2.3 SSSW-SW03
5.2.3.1 Functional Construction
0025-3092
T-5-2
5.2.3.2 Detailed Discussions of Bit 1
0025-3093
Use it to enable/disable transmission of an echo protect tone for a high-speed transmission V.29 modem signal (transmission speed at 9600 or 7200 bps).
If errors occur frequently at time of transmission because of the condition of the line, select 'transmit' so that a non-modulation carrier will be transmitted as a pre-
image transmission sync signal for about 200 msec.
5.2.3.3 Detailed Discussions of Bits 4, 5, and 6
0025-3094
Use it to select an appropriate transmission mode: international transmission (1), international transmission (2), or international transmission (3).
Use the service soft switch or the dial registration function to select the appropriate transmission mode if errors occur frequently at time of transmission to overseas.
Using the Dial Recognition Function (user level):
Select 'international transmission (1)' when making an entry in the Address Book. If errors still occur, select 'international transmission (2)' and then 'international
transmission (3)' in sequence until errors stop. The transmission mode selected using the One-Touch Dial function or the Speed Dial function will be give priority
over the setting made by the service soft switch.
An international transmission mode may be selected using the keypad if a mode has been selected using this switch; for settings, see the following table:
T-5-3
International transmission (1): select it to ignore the first DIS signal from the other party.
International transmission (2): select it to transmit a 1850-Hz total signal when transmitting the DIS signal.
International transmission (3): select it to transmit a 1650-Hz total signal when transmitting the DIS signal.
5.2.3.4 Detailed Discussions of Bit 7
0025-3095
Use it to enable/disable transmission of a 1080-Hz tonal signal before transmission of the CED signal.
Select 'transmit' if errors occur frequently because of an echo when reception is from overseas.
Bit Function 1 0
0 not used - -
1 echo protect tone at high-speed transmission transmit do not transmit
2 not used - -
3 not used - -
4 transmission mode: international transmission (1) use do not use
5 transmission mode: international transmission (2) or (3) use do not use
6 transmission mode international
transmission (3) international
transmission (2)
7 tonal signal before CED signal transmission transmit do not transmit
MEMO: Any of the following error codes may be indicated because of the line condition at time of transmission
##100, ##104, ##281, ##283, ##750, ##755, ##760, ##765
MEMO: Any of the following error codes may be indicated because of an echo at time of transmission
##005, ##100, ##101, ##102, ##104, ##201, ##280, ##281, ##283, ##284, ##750, ##760, ##765, ##774, ##779, ##784, ##794
Transmission mode Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
International transmission (1) * 0 0 1 0 0 * 0
International transmission (2) * 0 1 0 0 0 * 0
International transmission (3) * 1 1 0 0 0 * 0