HP FAX-750 Service Manual - Page 113

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: The WSW07 is not applicable in those countries where no dial tone or line current detection is supported, e.g., U.S.A. l 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." l Selector 3: Line current detection This selector determines whether or not the equipment should detect a line current before starting dialing. l Selectors 4 through 6: 2nd dial tone detection level These selectors set the detection level of the 2nd dial tone. l 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. V - 20