Ricoh Type M12 Field Service Manual page 161

No. Function
SIP: IP-FAX port mode (UDP)
00: 3 port mode
0-1
01: 2 port mode
10: 1 port mode
SIP: IP-FAX port mode (TCP)
00: 3 port mode
2-3
01: 2 port mode
10: 1 port mode
4-7 Not used.
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.
Bit Switches - 6
159