Psion Teklogix Win CE 4.2 user manual 7.2.5 Fax/Modem On COM 1/2/3/4, Troubleshooting And Tips

Chapter 7: Troubleshooting And Tips

Fax/Modem On COM 1/2/3/4

7.2.5 Fax/Modem On COM 1/2/3/4

If you have a Fax/Modem using COM Port 3 or 4, and ActiveSync on COM 1 or 2 (or vice versa), you may have trouble when trying to connect with the NETBOOK PRO.

Because of the way a PC handles COM ports, COM1 and COM3 are ‘linked’, as are COM2 and COM4. Specifically, they share the same Interrupt Request (IRQ).

In practice, this means that if you have a modem on COM3, it may conflict with the NETBOOK PRO on COM1 (and the same applies for COM4 and COM2). The solution is to try using ActiveSync on a different port or to assign a different IRQ.

You can check the COM port properties by following the steps above to get to the Device Manager page and double-clicking on the COM port.

Again, if you are in any doubt about whether you are able to do this safely, you should contact the person or organization that supports your PC.

108Psion Teklogix NETBOOK PRO Win CE 4.2 User Manual