Brother International 9870 Service Manual - Page 129
dialing and then disconnect the line.
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l Selectors 5 and 6: Busy tone detection in automatic sending mode These selectors determine whether or not the machine automatically disconnects a line upon detection of a busy tone in automatic sending mode. Setting selector 6 to "0" ignores a busy tone so that the machine does not disconnect the line. Setting selectors 5 and 6 to "0" and "1," respectively, makes the machine detect a busy tone only after dialing and disconnect the line. Setting both of selectors 5 and 6 to "1" makes the machine detect a busy tone before and after dialing and then disconnect the line. l Selector 7: Busy tone detection in automatic receiving mode This selector determines whether or not the machine automatically disconnects a line upon detection of a busy tone in automatic receiving mode. V - 17