ATZ or ATDT7195551212 strings, or respond with an error code. It's got a new USB cable and a DB25-to-DB9, so its not the cable....plugged it into my old ThinkPad, and it works great. I should mention that the Linux box is a Raspberry Pi 4B, 8 GB RAM, 500GB SSD.
Ted Long wrote to All <=-
I've been toying about with a retro BBS, targeted at hams and
electronics hobbyists. Wanted to add a true dialup node, so I
picked up a 56k USR 525 voice/data/fax modem. Has both DB-25 and
USB ports. Claimed to work with Win 95/98/2000. Unfortunately, my
Debian Linux box refuses to recognize it. I've tried mgetty,
vgetty, and agetty, and the modem simply won't recognize the ATZ
or ATDT7195551212 strings, or respond with an error code. It's
got a new USB cable and a DB25-to-DB9, so its not the
cable....plugged it into my old ThinkPad, and it works great. I
should mention that the Linux box is a Raspberry Pi 4B, 8 GB RAM,
500GB SSD.
I've been toying about with a retro BBS, targeted at hams and electronics hobbyists. Wanted to add a true dialup node, so I picked up a 56k USR 525 voice/data/fax modem. Has both DB-25 and USB ports. Claimed to work with Win 95/98/2000. Unfortunately, my Debian Linux box refuses to recognize it. I've tried mgetty, vgetty, and agetty, and the modem simply won't recognize the ATZ or ATDT7195551212 strings, or respond with an error code. It's got a new USB cable and a DB25-to-DB9, so its not the cable....plugged it into my old ThinkPad, and it works great. I should mention that the Linux box is a Raspberry Pi 4B, 8 GB RAM, 500GB SSD.
Any suggestions?
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.
Ted Long wrote to All <=-
I've been toying about with a retro BBS, targeted at hams and electronics hobbyists. Wanted to add a true dialup node, so I
picked up a 56k USR 525 voice/data/fax modem. Has both DB-25 and
USB ports. Claimed to work with Win 95/98/2000. Unfortunately, my Debian Linux box refuses to recognize it. I've tried mgetty,
vgetty, and agetty, and the modem simply won't recognize the ATZ
or ATDT7195551212 strings, or respond with an error code. It's
got a new USB cable and a DB25-to-DB9, so its not the
cable....plugged it into my old ThinkPad, and it works great. I
should mention that the Linux box is a Raspberry Pi 4B, 8 GB RAM,
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?
I've been toying about with a retro BBS, targeted at hams and
electronics hobbyists. Wanted to add a true dialup node, so I picked
up a 56k USR 525 voice/data/fax modem. Has both DB-25 and USB ports.
Claimed to work with Win 95/98/2000. Unfortunately, my Debian Linux
box refuses to recognize it. I've tried mgetty, vgetty, and agetty,
and the modem simply won't recognize the ATZ or ATDT7195551212
strings, or respond with an error code. It's got a new USB cable and
a DB25-to-DB9, so its not the cable....plugged it into my old
ThinkPad, and it works great. I should mention that the Linux box is
a Raspberry Pi 4B, 8 GB RAM, 500GB SSD.
I've been toying about with a retro BBS, targeted at hams and electronics hobbyists. Wanted to add a true dialup node, so I picked up a 56k USR 525 voice/data/fax modem. Has both DB-25 and USB ports. Claimed to work with Win 95/98/2000. Unfortunately, my Debian Linux box refuses to recognize it. I've tried mgetty, vgetty, and agetty, and the modem simply won't recognize the ATZ or ATDT7195551212 strings, or respond with an error code. It's got a new USB cable and a DB25-to-DB9, so its not the cable....plugged it into my old ThinkPad, and it works great. I should mention that the Linux box is a Raspberry Pi 4B, 8 GB RAM, 500GB SSD.
Any suggestions?
Tnx es 73, de
Ted, K4TML
Re: USR USB Modem woes
By: Digital Man to Ted Long on Sun Jan 29 2023 01:01 pm
Problem solved...finally!
Got it licked, Rob!
Went back over the few docs I could find online for the modem, and
carefully re-read all the manpages for the getty programs. Then
removed all the getty stuff, reinstalled minicom, and compared the /etc/.config files with everything i had printed out from the
previous installation. Then I noticed some fine print in the online
docs for the modem..."some UNIX systems capable of assigning virtual
serial ports may identify the modem as /dev/ACMn, or /dev/ttyACMn",
So I changed the serial port ID to /dev/ttyACM0. The modem shot "OK"
right back. Got a friend with a modem to call the BBS phone line, and
he was able to connect at 56k down and 28.8k up. Now comes the fun part...setting up Synchronet, loading some files, and getting SMTP,
QWK, and DDNS working. Thanks for the help, all! I'll probably be
bugging sysadmins with silly noob questions as work on the BBS
continues.
I'll probably be
bugging sysadmins with silly noob questions as work on the BBS
continues.
Sysop: | Scottrudy |
---|---|
Location: | Fremont, CA |
Users: | 2 |
Nodes: | 10 (0 / 10) |
Uptime: | 70:20:56 |
Calls: | 35 |
Calls today: | 1 |
Messages: | 19,968 |