Omni 56K II and Omni 56K Plus II User’s Guide

STANDARD

BIT RATE [BPS]

BAUD RATE

MODULATION

CARRIER

 

 

[BAUD]

 

FREQUENCY [HZ]

 

 

 

 

 

V.34bis/V.34

2400-33600

multiple

TCM

multiple

 

 

 

 

 

V.32bis

14400

2400

128-TCM

1800

 

 

 

 

 

V.32bis

12000

2400

64-TCM

1800

 

 

 

 

 

V.32bis

7200

2400

16-TCM

1800

 

 

 

 

 

V.32

9600

2400

32-TCM

1800

 

 

 

 

 

V.32 uncoded

9600

2400

16-QAM

1800

 

 

 

 

 

V.32

4800

2400

4-DPSK

1800

 

 

 

 

 

V.23

1200/75

1200/75

FSK

 

 

 

 

 

 

V.23

600/75

600/75

FSK

 

 

 

 

 

 

V.22bis

2400

600

16-QAM

1200 Call

 

 

 

 

2400 Ans

 

 

 

 

 

V.22

1200

600

4-DPSK

1200 Call

(BELL 212A)

 

 

 

2400 Ans

 

 

 

 

 

V.21

300

300

FSK

 

 

 

 

 

 

BELL 103

300

300

FSK

 

 

 

 

 

 

3.7Flow Control

This feature refers to stopping and restarting the flow of data into and out of the modem's transmission and receiving data buffers. Flow control is necessary so that a device does not receive more data than it can handle. The Omni 56K II and Omni 56K Plus II provide two kinds of flow control methods.

3.8Hardware CTS/RTS Flow Control

This is a bi-directional flow control where CTS (Clear to Send) and RTS (Ready to Send) are RS-232 signals that must be available on your computer. CTS is an RS-232 signal that means the device can send data now. RTS signifies that the device is now ready to receive data. Both CTS and RTS are hardware methods of flow control.

Specifications and Functions

3-5