Re: [vcf-midatlantic] AT&T Dataphone - Modem or "Service"?
The short-short of it: citing http://www.bitsavers.org/pdf/att/000-111_ATT_Documentation_Guide_Nov87.pdf Dataphone is a registered trademark of AT&T I saw the Dataphone label on all sorts of modems: SDLC, async, dialup and probably leased line as well. Citing Justin Jernigan's posting
It was a Service, appears to still be, though likely no longer actively sold. It's one of the first digital services tariffed by the telephone companies ... This was pre-divestiture, so service and equipment were "one"
Set the wayback machine to 1976 (the US Bicentennial). "Ma Bell" was a regulated monopoly, personified in many ways, most memorably Lily Tomlin's character Ernestine the switchboard operator. https://en.wikipedia.org/wiki/Lily_Tomlin But internally, Bell System folks were extremely proud of their work, creating and maintaining "the best phone service in the world". You were not allowed to own phone equipment: it was all leased thus all the Western Electric phones saying "not for sale". Add an extension phone and you'd get a "service call" to force you to disconnect it. Even after-market equipment was forbidden, such as the "name caller" auto-dialer (which pulse-dialed numbers you filled onto a plastic belt with an electrographic pencil). New York City high schools all had an IBM RJE (remote job entry) terminal: card reader and line printer, to a modem the operator had to manually dial with a rotary phone (no smart modems, yet!). At the other end was an IBM 360/370 running HASP or JES for batch jobs. As to the rack of modems the Original Poster remembers: that's probably intended for the receiving end: answer-only or answer-mostly mode. UUCP was the only way I was aware of AT&T hardware weirdness where the dialer was separate from the modem. -- jeff jonas
On 8/8/19 3:58 AM, Jeffrey Jonas via vcf-midatlantic wrote:
The short-short of it: citing http://www.bitsavers.org/pdf/att/000-111_ATT_Documentation_Guide_Nov87.pdf Dataphone is a registered trademark of AT&T
I saw the Dataphone label on all sorts of modems: SDLC, async, dialup and probably leased line as well.
Yup, lots of DS0 (and sub divided DS0s) and T1s. Not so many T3s as those we too expensive. -- Linux Home Automation Neil Cherry ncherry@linuxha.com http://www.linuxha.com/ Main site http://linuxha.blogspot.com/ My HA Blog Author of: Linux Smart Homes For Dummies
On 8/8/19 10:42 AM, Neil Cherry via vcf-midatlantic wrote:
The short-short of it: citing http://www.bitsavers.org/pdf/att/000-111_ATT_Documentation_Guide_Nov87.pdf
Dataphone is a registered trademark of AT&T
I saw the Dataphone label on all sorts of modems: SDLC, async, dialup and probably leased line as well.
Yup, lots of DS0 (and sub divided DS0s) and T1s. Not so many T3s as those we too expensive.
Long before those were common for this type of use, there was a big crop of leased-line subrate modems that bore the Dataphone moniker, from 9600 baud down to 1200, and possibly below that. These were for four-wire leased lines. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
On 8/8/19 2:21 PM, Dave McGuire via vcf-midatlantic wrote:
On 8/8/19 10:42 AM, Neil Cherry via vcf-midatlantic wrote:
Yup, lots of DS0 (and sub divided DS0s) and T1s. Not so many T3s as those we too expensive.
Long before those were common for this type of use, there was a big crop of leased-line subrate modems that bore the Dataphone moniker, from 9600 baud down to 1200, and possibly below that. These were for four-wire leased lines.
Yes switched56 service and T1 DSUs. I used to use Paradyne 740 muxes to break those out. I can't recall what the previous company name of the 740 was. I also recall the Baby Bells delivering a special current loop line for AP News service (I think it was dry). Those were fun, 28.8 baud. :-) I don't recall anything like a DSU involved but that may not have been hear the equipment I was working with (5 bit code as I recall but it was newpaper code not Baudot). Now I work with 100GE and I hear they're working on 400GE. Progress marches on ... -- Linux Home Automation Neil Cherry ncherry@linuxha.com http://www.linuxha.com/ Main site http://linuxha.blogspot.com/ My HA Blog Author of: Linux Smart Homes For Dummies
participants (3)
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Dave McGuire -
Jeffrey Jonas -
Neil Cherry