Brent - thanks! I had found the arcelect site and read the docs on a few related modems; that gave me some insight. But a lot of what they have is more primitive that this one, so much of the manuals do not apply.
I opened the case looking for clues and taped to the underside of the lid was a handwritten note that said "To awaken the UDS 212A/D mode send to UT capital EN or H Help menu." It was a little cryptic but sending "EN" did launch me into a menu system that would let me dial or set pre-set phone numbers for dialing. At the moment it auto answers and tries to dial, but it won't complete a connection. My VOIP line might be to blame for that. I'm happy because I got really lucky with the handwritten note ... On Mon, Dec 16, 2019 at 2:02 PM Brent Hilpert via cctalk < [email protected]> wrote: > On 2019-Dec-16, at 10:35 AM, Michael Brutman via cctalk wrote: > > I ran across this modem (circa 1982) and saved it, but I have no idea on > > how to control it. Bitsavers doesn't seem to have a manual for it. > > > > It's a big, blue plastic box and it looks wonderful. There is an array > of > > 8 lights and 6 buttons; the HS button enables 1200 bps operation, > otherwise > > it is 300 bps. It echoes characters and responds correctly to > > DataTerminalReady not being asserted, so I think that if I can find the > > command set it might be functional. > > > > It's a little more primitive than my original Hayes 1200 that I first got > > in 1984. (I'm not expecting a standard command set.) A picture of it > can > > be found here: > > > > https://photos.app.goo.gl/zWBPimcpZNUch6G28 > > > > These refs might give some clues: > > > https://books.google.ca/books?id=u1cLS3rMWSwC&pg=RA2-PA1-IA15&lpg=RA2-PA1-IA15&dq=motorola+212A/D&source=bl&ots=exwzJccl5t&sig=ACfU3U2pl0FAtd80wNsCDz5MtxYdZxs4zg&hl=en&sa=X&ved=2ahUKEwjFl-_SlLvmAhXTPn0KHb1TC4YQ6AEwCHoECAsQAQ#v=onepage&q=motorola%20212A%2FD&f=false > > > (Switch configs for a model variation and reference to an "XXXT<CR>" > escape sequence.) > > https://stason.org/TULARC/pc/modems-telephone-ISDN/M-O/MOTOROLA-INC-Modem-synchronous-asynchronous-212A-D.html > > > (Manuals for related products) > https://arcelect.com/Telenetics-UDS_202T-VDC_modem.htm > https://arcelect.com/UDS_201BC-AS_modem.htm
