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From: Bud Frede <frede@mouse-potato.com>
Newsgroups: alt.os.linux.ubuntu
Subject: Re: OT: anybody remember ATDT commands for telephone line
Organization: Wossamotta U.
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Henry Crun <mike@rechtman.com> writes:

> On 04/07/2023 8:18, Heinz Schmitz wrote:
>> bilsch01 wrote:
>> 
>>> ...
>>> I remember using AT commands via serial modem - I don't know the proper
>>> name for what the AT commands are called. Anybody?
>>> Anybody know an internet reference listing the commands?
>>>
>>> When I woke up this morning my brain was having the memory of the AT
>>> commands. I would like to tinker with them for a day or two, but I don't
>>> know if that's even possible with our comcast gateway. If it is maybe I
>>> could communicate with the public library using my
>>> Zoom 56k USB Modem.
>>> Any info will be appreciated.
>> Once upon a time we got "User Manuals", when we bought hardware.
>> So I bet, You will find anything about the AT commands, when you find
>> a user manual for an "old" modem.
>> Regards,
>> H.
>> 
>
> I just found, among my souvenirs a booklet titled "FAX/DATA MODEM USER'S MANUAL"
> and stuck inside a list of Trumpet on Win3.11 setup commands
>
> Before the advent of TCP/IP I recollect using Kermit on RSTS/E with scripts
> to semi-automatically do terminal emulation and file transfers.
> We were lucky to have 1200 baud modems, other in areas with 1940-1950 era copper lines
> were limited to 110 baud.

I used RSTS/E this century. :-) There was an application written in
Basic-Plus that was still in use (and maintained) by a company I worked
for. When DEC hardware was no longer available, they wrote an emulator
that ran on top of SCO OpenServer and RSTS/E ran in that.

It was really interesting to work on and see how things were done back
when PDP-11s were common.