Brother International MFC 9760 Service Manual - Page 190

Selector No. 1 2 3 4 | 6 7 8 WSW07 (Dial tone setting 1) Function Frequency band range Line current detection 2nd dial tone detection level (Z = 600 Ω) 1st dial tone interrupt detecting time Not used. Setting and Specifications No. 1 2 00 01 1X : Narrows by 10 Hz : Initial value : Widens by 10 Hz 0: No 1: Yes 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 0: 30 ms 1: 50 ms NOTE: Selectors 1 through 7 are not applicable in those countries where no dial tone or line current detection 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 dialing) 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 machine 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. 11