Brother International MFC 8890DW Service Manual - Page 447

Selector No. Function Setting and Specifications No. 1 2 1 0 0: Narrows by 10 Hz Dial tone frequency band control 0 1: Initial value 2 1 0: Widens by 10 Hz 1 1: Widens by 10 Hz 3 Line current detection (Not used.) 0: No 1: Yes No. 4 5 6 0 0 0: -21 dBm 4 I 2nd dial tone detection level (Z = 600 Ω) 6 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 Allowable instantaneous 7 interrupt during reception of 1st 0: 30 ms 1: 50 ms dial tone 8 Not used. Note: • Selectors 1, 2, 4 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: Dial tone frequency band control These selectors set the frequency band for the 1st dial tone and busy tone (before dialing) to be detected. This setting is effective only when selectors 1 through 3 on WSW05 are set to "1,1,1." • Selectors 4 through 6: 2nd dial tone detection level These selectors set the detection level of the 2nd dial tone. • Selector 7: Allowable instantaneous interrupt during reception of 1st dial tone This selector sets the allowable instantaneous interrupt period that should be ignored during reception of the 1st dial tone. App. 1-13 Confidential