Ricoh M052 Service Manual page 590

Bit Switches
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)
M381
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.
84 SM