Internal Modem Installation with Windows 3.x
The following are recommended combinations of COM port and IRQ settings when not using Plug and Play:
COM 1, IRQ 4 or | COM 2, IRQ 3 |
Most computers provide you with COM1 and COM2. If you do not use either of these two ports, you may disable them either in your computer's BIOS or with jumpers (refer to the manual of your PC). Any device attached to a disabled COM port will not be useable anymore, so it is advisable to check your computer's configuration thoroughly before proceeding. Generally the serial mouse is on COM1.
COM3 and COM4 may also be used. It is not recommended to assign these ports an IRQ already used by another device, e.g. an active COM1 (IRQ4) or COM2 (IRQ3). If it is not possible to disable COM1 or COM2, you may use either IRQ5 or IRQ7. However, be aware that IRQ7 is generally used by the printer port LPT1 and may therefore not be available. (You may be able to disable this port, if it is not used.) You should also check if a sound card is installed in your PC, which usually is on IRQ5. A sound card can be reconfigured to use another IRQ, i.e. 10. Refer to your sound card manual.
It is recommended that the modem be installed on COM2 whenever possible.
How to Insert the Modem into the Computer
1.Before installing your modem, write down your modem's serial number. The serial number is on the white label under the bar code on the modem and on the outside of the box.
Serial Number_______________________
Before you unplug any cords, label them or make a sketch of how they are connected. This can be helpful when you plug them back in later.
24 56K Voice Faxmodem Internal - User’s Guide