7.4.1 Transmission Mode

The machine is designed to change the message transmitting speed in accordance with the following fall-back plan, which is shown in the table 7-1.

Table 7-1

 

Fall-Back

Protocol

Transmission

No. of

RTN

 

Rank

Speed (bps)

Training

received

 

 

 

 

 

 

 

 

 

 

 

1st

ITU-T V.17 (V.33)

14400

1

1

 

 

 

 

 

 

 

 

 

 

 

2nd

ITU-T V.17 (V.33)

12000

1

1

 

 

 

 

 

 

 

 

 

 

 

3rd

ITU-T V.17 (V29)

9600

1

1

 

 

 

 

 

 

 

 

 

 

 

4th

ITU-T V.17 (V.29)

7200

1

1

 

 

 

 

 

 

 

 

 

 

 

5th

ITU-T V.27 ter.

4800

2

1

 

 

 

 

 

 

 

 

 

 

 

6th

ITU-T V.27 ter.

2400

2

1

 

 

 

 

 

 

 

 

 

 

7.4.2Signal Level

The send will be -10.5 dBm for the US/Canada versions, -10dBm for the INT'L version and will be -11.5 dBM for the GER version, as a PTT requirement. None of the versions will provide an adjustable attenuator, but the sending level can be programmed by keypad control.

The receive modem will function with an incoming signal in the range of zero to -40 dBm or -6 to -43 dBm.

7.5Protocol and Data Transmission

The unit will conform to the following protocol and data transmission procedures:

Group 3 - ITU-T recommendations T.30 and T.4

OKI Special Protocol

High-Speed Protocol - the T.30 handshaking procedure will be conducted at messagetransmission speed instead of 300 baud, during TX multi-page and multi-document transmissions.

Note: This feature disable when you set 9.6k to the H/Modem Rate (technical setting No.13).

40672201TX Rev.4

7 - 2