Ricoh M281 Series Service Manual page 898

Service Program Tables
4.1.7 SP7-XXX (TESTS)
These are the test modes for PTT approval.
7 Function
101 G3-1 Modem Tests
102 G3-1 DTMF Tests
103 Ringer Test
104 G3-1 V34 (S2400baud)
105 G3-1 V34 (S2800baud)
106 G3-1 V34 (S3000baud)
107 G3-1 V34 (S3200baud)
108 G3-1 V34 (S3429baud)
109 Recorded Message Test
D255/D256 FAX OPTION 64 SM