ZyXEL Communications Omni 56K II - Manual (Page 33)

Omni 56K II and Omni 56K Plus II User’s Guide
Specifications and Functions 3-5
STANDARD BIT RATE [BPS] BAUD RATE
[BAUD]
MODULATION CARRIER
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
(BELL 212A) 1200 600 4-DPSK 1200 Call
2400 Ans
V.21 300 300 FSK
BELL 103 300 300 FSK
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.