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Ethernet+Modem/Fax PC Card User’s Guide
4-2 Modem/Fax Setup
• Selecting a Mode (Modem Choice)
To determine your modem’s model, check the modem equipment itself, and
the documentation that comes with it. If the model number does not appear
anywhere in these above-mentioned locations or on the software list, use the
14400/28800/33600 Generic Modem Compatibles from the Modem
software installation options.
• Parity
Parity types and values must be the same on both the modems when
transmitting and receiving. Not many systems use parity, so it is usually set to
NONE when specified in software
• Word Length
The number of bits in each character your PC sends at one time. The default is
8, and the range of permissible values depends on modem speed:
14,400 kbps: 5 to 8 bits
28,800 kbps: 7 to 8 bits
33,600 kbps: 7 to 8 bits
• Stop Bits
Each character transmitted is terminated by a stop bit. The default is 8, and the
range of permissible values depends on modem speed:
14,400 kbps: 1, 1.5, or 2 stop bits
28,800 kbps: 1 or 2 stop bits
33,600 kbps: 1 or 2 stop bits
• Flow Control
Flow Control denotes the ability to start and stop data transmission. Two
available methods of Flow Control are: XON/XOFF and RTS/CTS.
XON/XOFF interprets characters embedded in the data stream that indicate
when data flow should be started or stopped.
RTS/CTS is a hardware based feature. It determines when to start or stop data
flow. One device issues a “request to send” to the other, and the second device
answers with a “clear to send.”