Brother FAX-170 Service Manual page 101

Selectors 6 and 7: Dial tone detection in PABX
These selectors activate or deactivate the dial tone detection function which detects a dial
tone when a line is connected to the PABX.
Setting both of these selectors to "1" activates the dial tone detection function so that the
equipment starts dialing upon detection of a dial tone when a line is connected.
Other setting combinations deactivate the dial tone detection function so that the equipment
starts dialing after the specified WAIT (3.5, 5.0, or 7.0 sec.) without detection of a dial tone
when a line is connected.
Selector 8: "R" key function
This selector determines whether or not the 1st dial tone detection function (specified by se-
lectors 1 through 3 of WSW05) is added to the R key.
If this selector is set to "0," pressing the R key automatically activates the 1st dial tone detec-
tion function when the PABX and the automatic calling are selected by using the function
switch. If you press the R key and a dial number in succession, the equipment will automati-
cally carry out the 1st dial tone detection function following the original transfer function as
shown below.
Original transfer
function of R key
Dial number
1st dial tone detection function
V – 13