Brother MFC 1870MC, Service Manual, Page: 115 / 217

V –
20
WSW07
(Dial tone setting 1)
Function
Selector
No.
Setting and Specifications
No. 4 5 6
0 0 0 : -21 dBm
0 0 1 : -24 dBm
0 1 0 : -27 dBm
0 1 1 : -30 dBm
1 0 0 : -33 dBm
1 0 1 : -36 dBm
1 1 0 : -39 dBm
1 1 1 : -42 dBm
NOTE: The WSW07 is not applicable in those countries where no dial tone or line current de-
tection is supported, e.g., U.S.A.
●
Selectors 1 and 2: Frequency band range
These selectors set the frequency band for the 1st dial tone and the busy tone (before dial-
ing) to be detected.
This setting is effective only when selectors 1 through 3 of WSW05 are set to "1, 1, 1."
●
Selector 3: Line current detection
This selector determines whether or not the equipment should detect a line current before
starting dialing.
●
Selectors 4 through 6: 2nd dial tone detection level
These selectors set the detection level of the 2nd dial tone.
●
Selector 7: 1st dial tone interrupt detecting time
This selector sets the allowable time length of an interrupt which should not be interpreted as
an interrupt in the 1st dial tone dialing.
1
2
4
|
6
7
8 Not used.
1st dial tone interrupt detecting
time
2nd dial tone detection level
(Z = 600
Ω
)
Frequency band range
3 Line current detection 0: No 1: Yes
No. 1 2
0 0 : Narrows by 10 Hz
0 1 : Initial value
1 X : Widens by 10 Hz
0: 30 ms 1: 50 ms