Ricoh D117 Service Manual page 1178

Bit Switches
IP Fax Switch 0A - Not used (do not change the settings).
IP Fax Switch 0B - Not used (do not change the settings).
IP Fax Switch 0C - Not used (do not change the settings).
IP Fax Switch 0D - Not used (do not change the settings).
IP Fax Switch 0E - Not used (do not change the settings).
SM 121 D649