Re: Help with USR Sportster 33.6 modem, RedHat Linux 4.1

[raoul@cirl.meei.harvard.edu]

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Phil says:
  At 02:15 24/03/97 EST, Nico Garcia wrote:
  >[snip]
  >I cannot access the modem *at all* with anything, such as kermit,
  >HylaFAX, dip, or other utilities. Kermit will open the line on
  >/dev/cua0 but I see no responses whatsoever. Under the Win95 system,
  >it is COM2, but the *only* line that will even let me connect is
  >/dev/cua0, not /dev/cua[123].
  >[snip]

  Just wonder if it's a IRQ conflict? The 'standard' PC configuration has
  COM1/3 sharing IRQ 4 and COM2/4 sharing IRQ 3. This is a disaster and if
  you want to run a mouse on com 1 and a modem on com 3 (for example), you
  will need to find a vacant IRQ and

Conceivable, but I don't think so. My mouse is a PS/2 mouse. From what
little DOS work I've done, it seems that the COM1/COM3 setup you've
described would never have worked even under Win95, and the modem and
mouse operate fine under Win95 with the exact same hardware.

	  reconfig your internal modem jumpers to use that
	  tell Linux (using setserial) that this is the IRQ for that port.

I downloaded setserial last night, and will be playing with it today.
I thought USR Sportsters had software configurable interrupts: at least,
I seem able to play with it in the Win95 device manager.

  While you're experimenting, perhaps a 
	  cat /proc/interrupts >> /var/log/messages
  may help before and after the port setup in your rc.local script.

  Once you get it going, this mailing list has recommended that the 
  DCE/DTE-Rate is set down to 19200bps on USR Sportster 33.6 modems....

After it's communicable at all, I can try that. As it is, even
probemodem doesn't work.

			Nico Garcia
			Engineer, CIRL 
			Mass. Eye and Ear Infirmary
			raoul@cirl.meei.harvard.edu

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