Brother MFC5100C Service Manual page 204

Selector
No.
1 Not used.
2 Ringer OFF setting
3 Not used.
Detection of distinctive ringing
4
pattern
5
| Not used.
8
NOTE: Selector 4 is applicable only to the U.S.A. versions.
Selector 2: Ringer OFF setting
This selector determines whether or not the ringer can be set to OFF.
Selector 4: Detection of distinctive ringing pattern
If this selector is set to "1," the equipment detects only the number of rings; if it is set to "0," the
equipment detects the number of rings and the ringing time length to compare the detected ringing
pattern with the registered distinctive one.
WSW27
(Function setting 5)
Function Setting and Specifications
0: Yes
0: Yes
28
1: No
1: No