Modem User's Manual

Address should already be set by Windows to the COM port

address used by the modem (refer to Table 2-1). Change the

Interrupt Request Line (IRQ) to match the IRQ on the

modem. If you have set the modem to COM4/IRQ2, do not

select IRQ2. You will need to set the IRQ in Control Panel to

IRQ9 for Windows to recognize the modem. (In an operating

system designed for 286 or better machines, IRQ 9 is

equivalent (redirected) to IRQ2.)

A modem setting which skips one or more COM port

assignments requires special attention in the Windows 3.x

Control Panel. For example, if your computer is equipped

with two serial ports (COM1 and COM2) and have set the

modem to COM4 instead of COM3, the Control Panel

settings for COM4 may say Default. In this case, Windows

3.x will operate the modem as the third serial device and

recognize it as “COM3” (This unusual COM port reassign-

ment does not occur in future releases of Windows). The

correct COM4 address (2E8) has been placed into the

Control Panel COM3 position. Configure the COM3 entry in

Control Panel by changing the IRQ box to match the IRQ that

has been set on the modem. (When running any Windows

3.x-based communication or fax programs, select COM3 as

the COM port for the modem.)

After these settings are made, click OK. Click Restart

Now. Windows can now recognize your modem.

Note: Since the “COM3” substitution for your

COM4 modem only occurs under Windows 3.x,

your DOS communication and fax programs will

still recognize the modem configuration as COM4.

We suggest the following communication parameters

when you first use your data communication software.

Consult the software manual for information on using these

and other parameters/features.

38,400 bps; 8 data bits; no parity; 1 stop bit; RTS/

CTS flow control set to “on;” initialization string:

AT&F

The commands used by the modem are compatible

with the command set used by Intel modems. Select an “Intel

144I Faxmodem” type in your data communications soft-

ware, select a “Generic Class 1” type in your fax software

and select “Cirrus Logic” in your Voice software.