Canon GP160DF Service Handbook page 86

CHAPTER 4 SERVICE MODE
[Bit 3]
Selects the reception mode after CFR signal transmission.
When errors due to the telephone line condition occur frequently in reception, select
"high-speed" reception mode and set the user data ECM reception setting off.
:
MEMO
Error codes for errors which occur in reception due to telephone line trouble
##107, ##114, ##201
Change Bit 4 before changing this bit. If errors continue to occur, change this bit.
When "high-speed" is selected, only high-speed (image) signals will be received after
CFR signal transmission.
[Bit 4]
Selects the length of time to ignore a low-speed signals after CFR signal transmission.
When the condition of the telephone line is not good and it is difficult to receive image
signals, set to 1500 ms.
[Bit 5]
Selects whether or not to perform CI signal frequency check during PSTN/PBX in user
data set to PBX.
[Bit 6]
Selects whether or not to transmit a CNG signal in manual transmission.
When errors occur frequently, check whether "send" CNG signal is selected.
[Bit7]
Selects whether or not to transmit a CED signal in manual reception.
When the other party's machine does not start transmission when manual reception is
being performed, select "send".
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