Ricoh Aficio MP C3001 Service Manual page 1916

Bit Switches
Communication Switch 1B (SP No. 1-104-028)
No Function
Extension access code (0 to 7)
to turn V.8 protocol On/Off
0-7
0: On
1: Off
Communication Switch 1C (SP No. 1-104-029)
No Function
Extension access code (8 and
9) to turn V.8 protocol On/Off
0-1
0: On
1: Off
2-7 Not used
Communication Switch 1D - Not used (do not change the settings)
Communication Switch 1E - Not used (do not change the settings)
Communication Switch 1F - Not used (do not change the settings)
D545
Comments
If the PABX does not support V.8/V.34 protocol
procedure, set this bit to "1" to disable V.8.
Example: If "0" is the PSTN access code, set bit 0
to 1. When the machine detects "0" as the first
dialed number, it automatically disables V.8
protocol. (Alternatively, if "3" is the PSTN access
code, set bit 3 to 1.)
Comments
Refer to communication switch 1B.
Example: If "8" is the PSTN access code, set bit 0
to 1. When the machine detects "8" as the first
dialed number, it automatically disables V.8
protocol. (If "9" is the PSTN access code, use bit
1.)
Do not change the settings.
112 SM