Dan Purgert wrote:
123456789 wrote:
On 2/16/2019 11:15 AM, nospam wrote:
123456789 wrote:

Putting the coupler in a suitcase was not a big burden

...you would have needed a laptop back then anyway.

Is this/he for real!?

When you were using/carrying the acoustic coupler around, did you
have/use a *laptop*!? It was most likely a 'portable computer', FSVSVO
'portable'. ('Mine' had to be carried by two people and that was only
the computer, never mind the peripherals.)

BTW, I couldn't find an introduction date for RJ11, but I'm quite sure
that our acoustic coupler didn't have it.

IIRC, it was in the 70s, after AT&T lost the lawsuit that it was "their"
wiring inside customer premesis.

But its well before my time, so may be off by a few decades.

In either evect, it seems that it'd be a bit supergluous to have a phone
jack on an acoustic coupler.

Yup. Brain was mixed up. I meant, I don't think RJ11 existed at that
time (very early 70s, maybe even late 60s), or at least was not (yet) in
common use.

The Wikipedia 'Acoustic coupler' page [1] indicates that commercial
acoustic couplers started as early as 1968, maybe even 1964.

I can't remember the name of the HP-owned brand we used, let alone a
model number.

The HP Computer Museum only mentions a much, much newer (1984) one [2].

BTW, while searching, I saw this neat page:

'Dear Modem from 1964, Welcome to the Internet'
https://gizmodo.com/dear-modem-from-1964-welcome-to-the-internet-5272376

[1] https://en.wikipedia.org/wiki/Acoustic_coupler

[2] http://www.hpmuseum.net/display_item.php?hw=822