Flow Control; Hardware Cts/Rts Flow Control - ZyXEL Communications Omni 56K II User Manual

STANDARD
V.34bis/V.34
V.32bis
V.32bis
V.32bis
V.32
V.32 uncoded
V.32
V.23
V.23
V.22bis
V.22
(BELL 212A)
V.21
BELL 103
3.7

Flow 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.
3.8

Hardware 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
BIT RATE [BPS]
2400-33600
14400
12000
7200
9600
9600
4800
1200/75
600/75
2400
1200
300
300
Omni 56K II and Omni 56K Plus II User's Guide
BAUD RATE
[BAUD]
multiple
2400
2400
2400
2400
2400
2400
1200/75
600/75
600
600
300
300
MODULATION
TCM
128-TCM
64-TCM
16-TCM
32-TCM
16-QAM
4-DPSK
FSK
FSK
16-QAM
4-DPSK
FSK
FSK
CARRIER
FREQUENCY [HZ]
multiple
1800
1800
1800
1800
1800
1800
1200 Call
2400 Ans
1200 Call
2400 Ans
3-5