Canon GP160DF Service Manual page 548

CHAPTER 4 SERVICE MODE
[No. 10]
Sets the line connection identifier time. When errors occur frequently during communica-
tions due to telephone line conditions, raise this parameter.
:
MEMO
"The waiting time from the end of transmission of the selection signal to detection of
a significant signal at time of transmission" which was previously set by parameter 10
as T1 timer, has, by the recommendation of ITU-T, become T0 timer. Therefore for
this machine, parameter 10 has been changed to T0 timer and the default time out
interval has been changed from 35 seconds to 55 seconds.
Furthermore, the transmitting party's T1 timer (the waiting time from when CED, V21
flag or ANSam's significant signal is detected until the next significant signal is
detected) is fixed at 35 seconds.
[No. 11]
Sets the receiver's T1 timer (the waiting time from the start of DIS transmission to the
receipt of a significant signal).
When errors occur frequently during receiving due to telephone line connection condi-
tions, raise this parameter.
[No. 13]
Sets the maximum time allowed for receiving per one line of image data when receiving
image data. When the image data receiving time per line is long, increase this parame-
ter's setting and increase the maximum time allowed for receiving.
[No. 15]
Sets hooking detection time. When changing the hooking timing, adjust this parameter.
When it is set to 50, it recognizes hooking longer than 500ms as being "on hook".
[No. 27]
Use it to change the period of time spent to detect the header flag of a V.21 low-speed
command. Decrease it so that it is as close to 15 (150ms) as possible if detection fails
because of such effects (as echoes as when communicating with an overseas party).
On the other hand, increase it so that it is as close to 25 (250ms) as possible is a tone
signal or the like is wrongly identified as the header flag of a low-speed command.
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