Ricoh IM C300 Service Manual page 1573

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 (SP No. 1-111-013)
No. Function
0-1 SIP: IP-FAX port mode
(UDP)
00: 3 port mode
01: 2 port mode
10: 1 port mode
2-3 SIP: IP-FAX port mode
(TCP)
00: 3 port mode
01: 2 port mode
10: 1 port mode
4-7 Not used.
D0CK
Comments
Switch the port mode for IP-FAX (T38 transport: UDP) at SIP call
control.
Switch the port mode for IP-FAX (T38 transport: TCP) at SIP call
control.
Do not change these settings.
98
Bit Switches – 5
SM