cannot get new modem to work

i recently replaced a well-working isa 28 kbs modem in my 233mh win 98 system with a 3com 56k pci p-n-p model. this is NOT a win-modem. installation was a breeze; it installed itself after asking for drivers which were supplied on floppy. these are 3com's latest.

it worked very well for a few days, giving me the expected quick browsing speeds. then i started to get 'general hardware use failure' messages when trying to connect to the internet. i ran 'more info' diagnostic under modem properties and got 'port already open' message.

i removed the modem from device mgr, rebooted, and reinstalled. after fresh reinstall, diagnostics gives me good modem communication message. try to connect to the internet, and i get a farmiliar 'connection cannot be established due to hardware failure.' at this time diagnostics gives a 'port already open' message. in other words modem installs correctly, but attempting to log in under dial up networking produces the failure.

i've tried keing in ATM1L3X0DT12345 COM5 (enter) under hyperterminal and do get '12345' tones. that would indicate that the modem hardware is ok?

the dealer has given me an rma, but i'm not so sure the modem is faulty.
nushieAsked:
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pieterwConnect With a Mentor Commented:
Modem is defective, i've seen it happen a couple of times with USR before, (and i've seen a lot). Just use your RMA, and wait..

Good luck,

Pieter
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1cellCommented:
the fact that the modem picks up the line and dials does not necessarily mean it's good though it is a good sign.  

Does this modem have jumpers on it for selecting resources (COM & IRQ)?
If so, are you sure you have installed the modem correctly to an available port?

If all that is straight, I would probably say the modem went bad.
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nushieAuthor Commented:
plug n play. it assigns com 5, irq 10. no conflicts
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rayt333Commented:
You have a bad modem, this happens sometimes even with a fairly new one, You have the RMA then return it and you should have a new one in about a week, USR are very good with warranty work.

As a side note, is this modem less then 30 days old? if so I would return it to the dealer for replacement.
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nushieAuthor Commented:
is there any other expert that thinks the modem is probably faulty? that i've done all that i can? if so, i'll send it back.

thanks!
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1cellCommented:
nope, bad modem
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oldgreyguyCommented:
one quick way, is to go into Hyperterminal , and dial another line in your home/facility.
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breakspearCommented:
One last thing before you run back to USR whith the modem. Check task manager to see if anything is runing in the background which is trying to use it. I know it sounds silly but that has been known to hapen if, for example, a faulty software registration aplication runs on bootup.
End task on everything but explorer and systray and then try hyperterminal as oldgreyguy suggested.
Probably a bad modem but it's worth a try.
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1cellCommented:
that's a great answer!  I guess since that's exactly what others including the questioner have said before, it has to be right!  

please don't use others' comments as your answer and change your proposed answer to a comment.
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