Subj : USR USB Modem woes
To   : Ted Long
From : deon
Date : Mon Jan 30 2023 08:26 am

 Re: USR USB Modem woes
 By: Ted Long to deon on Sun Jan 29 2023 11:35 am

> Thanks for the response
>
>  Hotplug is detecting the modem....(cutcutpaste...)
>
> Bus 001 Device 006: ID 04c1:3021 U.S. Robotics (3Com) 56k Voice FaxModem Pro
>
>  And the kernel is assigning it to abstract (virtual) port /dev/ACM0....the
> modem apparently is seeing activity on the port, because when I plug in the
> USB cable, the data and CTS/RTS LEDs flash for a second. But there's no
> response to an AT command when sent from Minicom. I'm about ready to break
> out the 'scope or a logic probe to see if any data is actually being sent to
> the modem.

OK, what device is the comms program using to talk to a "modem"?

If you use minicom, you should be able to connect to port /dev/ACM0 and talk to it - get the baud right because the modem will be talking a default baud rate - probably 19,200 or 38,400, and if they dont work 115k might. You'll know your close, because you'll see gibberish at the wrong baud speed.


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