Advantech PCM-3601, User Manual

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1.4 The Serial Port and Interrupt of the Modem Card
Each peripheral device, such as a modem, uses a port that is
either serial or parallel, depending on its design. Each port can
only accept one device; otherwise, there is a conflict.
Your modem is designed for use with serial ports. You can use any
COM port, COM1 to COM4. Some computers, may support only
two serial ports. See your computer manual for the number of
ports on your computer.
Computers use interrupts (IRQ) to control the data flow between
computers and peripherals. An interrupt signals data to flow or to
stop, much like a traffic light controls the flow of traffic. Each serial
port needs an interrupt to control that particular port.
1.5 Setting the COM Port and Interrupt of the Modem Card
Your modem is factory set for use on COM4 with IRQ3. If you
choose to use it with another serial port or interrupt, you need to
change the COM jumper and IRQ jumper. Make sure the port and
interrupt set-up you use are not used by any other peripheral.
The COM/IRQ settings should appear as in the diagram below. If
you have any questions about setting a port for your modem
consult your dealer.
Pin
1-2 2-3 J1 J2
J3 IRQ3 IRQ4 COM1 (IRQ4) 1-2 1-2
J4 IRQ5 IRQ7 COM2 (IRQ3) 2-3 1-2
J5 IRQ9 IRQ10 COM3 1-2 2-3
J6 IRQ11 IRQ12 COM4 2-3 2-3
J7 IRQ15
Fig 1-2 Modem Card COM/IRQ Setting
1.6 Installing the Modem Card
The modem card is designed for reliability, but it should be kept
away from static electricity, shock, heat, and humidity.
IRQ
Jump
Jump
COM Port