Re: Modem/Com Port Question

[Jay Estabrook digital com]

>>> John Clayton said:
> I'm trying to install a Diamond Supra 56si modem on my PWS 500a (Red Hat
> 5.2).
> 
> Here's what I found (using minicom):
> 
> - When the modem is installed on com1 or com2 (standard IRQ's) I get no
> verbal responses from the modem (i.e. no "OK"'s, etc.), even though I can
> hear a dialtone, get the modem to dial, and hear a connection.  Because
> there's no verbal response, I get no login prompt or any other messages.

There is NO WAY to disable the builtin serial ports COM1 and COM2. Your
problems are most likely related to multiple serial chips responding to the
same addresses.

> - When the modem is on com3 (IRQ 4 or 5) I get the verbal responses but
> reaction to commands is slow (e.g. ATH1 takes at least 10 seconds to give
> a dialtone and return an OK).

I use COM3 and IRQ 5, and it works fine. The 10 second pause is a timeout
value, which indicates you're not taking interrupts. Did you do a "setserial"
to set the IRQ of COM3 appropriately?  You prolly have to set the jumpers on
the card so that it DOES NOT do PnP, but has a fixed COM port and IRQ.

Good luck.

--Jay++

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Jay A Estabrook                            Alpha Motherboards - LINUX Project
Compaq Computer Corporation                (508) 841-3241 or (DTN) 237-3241
334 South Street, Shrewsbury, MA 01545     Jay.Estabrook@digital.com
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