Subj : Re: USR USB Modem woes
To   : Gamgee
From : Moondog
Date : Mon Jan 30 2023 02:51 pm

  Re: Re: USR USB Modem woes
  By: Gamgee to Ted Long on Sun Jan 29 2023 08:56 am

 > -=> Ted Long wrote to All <=-
 > 
 >  TL>  I've been toying about with a retro BBS, targeted at hams and
 >  TL> electronics hobbyists. Wanted to add a true dialup node, so I
 >  TL> picked up a 56k USR 525 voice/data/fax modem. Has both DB-25 and
 >  TL> USB ports. Claimed to work with Win 95/98/2000. Unfortunately, my
 >  TL> Debian Linux box refuses to recognize it. I've tried mgetty,
 >  TL> vgetty, and agetty, and the modem simply won't recognize the ATZ
 >  TL> or ATDT7195551212 strings, or respond with an error code. It's
 >  TL> got a new USB cable and a DB25-to-DB9, so its not the
 >  TL> cable....plugged it into my old ThinkPad, and it works great. I
 >  TL> should mention that the Linux box is a Raspberry Pi 4B, 8 GB RAM,
 >  TL> 500GB SSD.
 > 
 > What OS is running on the Thinkpad?
 > 
 > Some of those type of modems are what used to be called "Winmodems", and
 > only work with Windows.
 > 
 > 
 > 
 > ... Daddy, what does "now formatting drive C:" mean?

Winmodems used a digital sound processor to generate tones, and relied on
software to work. 

Back in the dialup days I set up a dial on demand server/ router with a
modem that had a DB25 port.  This was being done with a lightweight linux
distro called Coyote linux, but the most important thing was selecting the por
t being used.  It was like that in the DOS days.  An external modem is just
that - an external device the PC doesn't have to detect or see.  It is
assumed it is there to accept send and receive requests. If you're
connecting via USB I imagine you should see a connection if you list usb
devices.

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