Brother MFC620CN Service Manual page 390

Selector
No.
1
Min. detection period required
for interpreting incoming
calling signal (CI) as OFF
2
3
Max. detection period for
incoming calling signal (CI)
being OFF
4
5
Min. detection period required
for acknowledging incoming
calling signal (CI) as ON
6
7 Line connection timing
8 Not used.
Selectors 1 through 4:
If the machine detects the OFF state of a CI signal for the period greater than the value set by
selectors 1 and 2 and less than the value set by selectors 3 and 4, it interprets the CI signal as OFF.
Selectors 5 and 6: Min. detection period required for acknowledging incoming calling signal (CI) as
ON
These selectors set the period required to make the machine acknowledge itself to be called. That is,
if the machine continuously detects a CI signal with the frequency set by selectors 1 through 4 of
WSW14 during the period set by these selectors 5 and 6, then it acknowledges the call.
Selector 7: Line connection timing
If a line is connected in a ringer-ON period, FAX models equipped with SDAA circuits may
malfunction due to the ringer voltage. To make the line connection stable, this selector should be
set to "0" so that a line is connected in a ringer-OFF period.
WSW12
(Signal detection condition setting)
Function
Min. detection period required for interpreting incoming calling signal (CI) as
OFF
Max. detection period for incoming calling signal (CI) being OFF
App. 4-15
Setting and Specifications
No. 1 2
0 0 : 1500 ms
0 1 : 500 ms
1 0 : 700 ms
1 1 : 900 ms
No. 3 4
0 0 : 6 sec.
0 1 : 7 sec.
1 0 : 9 sec.
1 1 : 11 sec.
No. 5 6
0 0 : 800 ms (1000 ms*)
0 1 : 200 ms
1 0 : 250 ms
1 1 : 150 ms
0: Ringer-OFF
period (default)
1: Ringer-ON
period
*1000 ms in Chinese models.
Confidential