Brother MFC9700 Service Manual page 201

Selector
No.
1 Not used.
2 Detection enabled time for CNG
and no tone
3
4
Not used.
5
6 Registration of station ID
7
Tone sound monitoring
8
Selectors 2 and 3: Detection enabled time for CNG and no tone
After the line is connected via the machine or the external telephone, the machine can detect a
CNG signal or no tone for the time length specified by these selectors. The setting specified by
these selectors becomes effective only when selector 8 of WSW20 is set to "1."
Selectors 7 and 8: Tone sound monitoring
These selectors set monitoring specifications of the tone sound inputted from the line.
WSW18 (Function setting 3)
Function
22
Setting and Specifications
No. 2 3
0 0 : 40 sec.
0 1 : 0 sec. (No detection)
1 0 : 5 sec.
1 1 : 80 sec.
0: Permitted
No. 7 8
0 X : No monitoring
1 0 : Up to phase B at the
calling station only
1 1 : All transmission phases
both at the calling and
called stations
1: Prohibited