Take the 2-minute tour ×
Server Fault is a question and answer site for professional system and network administrators. It's 100% free, no registration required.

I have three PCI fax modems:

With any combination of of these modems ( two USR, one USR one Hiro ) Windows XP only allows me to open one modem at a time.

Any suggestions of two PCI modem's that I could open at the same time?

share|improve this question
Have you tried running two copies of hyper terminal at the same time? –  stukelly May 7 '09 at 23:20
Yes that's the problem. –  Justin Tanner May 9 '09 at 6:58
you probably need a better terminal program... –  quack quixote Feb 4 '10 at 0:25

2 Answers 2

Just a stab in the dark..could it be IRQ's...I have not had to deal with them in so long that I don't remember when they went out of style..but if they are on the same IRQ then maybe that is the conflict..

share|improve this answer
Yep, you can check the COM port interrupt address in the BIOS, and usually change it too. It'll need to be different for each COM port you want to address. –  Chris Thorpe Feb 4 '10 at 0:23
@Chris Thorpe: not in the BIOS, since all of these are likely Winmodems; you'd need to do this in the Modems control panel or in the Device Manager. –  quack quixote Feb 4 '10 at 0:24

Just run Hyperterm twice as follows:

Start -> Run -> hypertrm Start -> Run -> hypertrm

Do it twice, and you get two copies of it running at once.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.