Ricoh RN-MF1 Service Manual page 104

5. System Maintenance Reference
Fax Maintenance
BT (Busy Tone)
Detection
5
Comm Settings
102
DFU
BT Setting [Off/ On]
BT: Busy tone
DFU
[300-550 Hz/ 300-650 Hz/ 325-525 Hz/ 340-550
BT Frequency
Hz/ 350-500 Hz/ 350-550 Hz/ 375-475 Hz/
380-520 Hz]
DFU
BT Level
[-35 dB/ -36 dB/ -37 dB/ -38 dB/ -39 dB]
DFU
BT Cadence
[0.10/ 0.15/ 0.20/ 0.25/ 0.30/ 0.35/ 0.40/
0.45/ 0.50/ 0.75]
The machine checks the actual data reconstruction
errors and then transmits an RTN depending on the
decoding error rate that is set by this setting (Number of
RTN Rate
lines containing an error per page / Total number of
lines per page).
[10%/ 15%]
DFU
V34 Modem
[Permitted (Default)/ Prohibited]
DFU
V17 Modem
[Permitted (Default)/ Prohibited]