Ricoh G157 Service Manual page 190

MAINTENANCE MODE
Selector 4: Max. pause time allowable for remote ID code detection
This selector sets the maximum pause time allowable for detecting the second digit
of a remote ID code after detection of the first digit in remote reception.
If selector 4 is set to "0" (2 seconds), for instance, only a remote ID code whose
second digit is detected within 2 seconds after detection of the first digit will
become effective so as to activate the remote function.
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.
Selector 7: Busy tone detection in automatic receiving mode
This selector determines whether or not the machine automatically disconnects
the line upon detection of a busy tone in automatic receiving mode.
G157 5-46 SM