Re: Introduction and info request - Jeff Schallenberg
- The modem enabled this;i believe the telco interface gear between the
computer and phone lines was called DDT & DDR(digital data
transmitter & receiver),and of course modems up to 4800bps. These
pages will shed some light on the process:
also a page on the old Stewart AFB Direction Center:
--- In email@example.com, "schallenbergjeff"
> This is Jeff Schallenberg, and I was glad to find this discussion
> group, in my quest for information on the early evolution of
> I am an ex-officer of the RCAF, back in the cold-war days of the
> sixties. My first posting after graduating from the University of
> Toronto with an Electrical Engineering degree, in 1964, was to a
> Pinetree Line radar site, Holberg, BC. It was home to 53 AC&W
> Squadron, and I was appointed Station Radar Officer. I came to
> understand how the FPS-20 Search radar and the FPS-9 Heightfinder
> radar worked, and I occasionally worked the Aircraft Control and
> Intercept consoles during exercises.
> But I never really came to understand how the radar return
> was processed and transmitted over VF lines and microwaves, throughData
> the BCTel network (I guess it was the Voice network, since Data
> networks were in their fetal stages back then), and thence to our
> Center at McChord AFB in Tacoma WA.the
> I remember a visit to McChord, and a visit to the computer room, but
> not a lot of details.
> I would like to find, with your help, links to descriptions of how
> information from remote radar consoles like those at Holberg wasNorth Bay.
> processed, encoded and transmitted to centers like McChord and
> I know there is a lot of good info in your archives on this Yahoo!
> group - but it's not easy to find with the Yahoo! Search function,
> some of the old nuggets point to web pages that are no longer activean
> (for example, one of your founding members photocopied and scanned
> article from the Bell Labs Record about "SAGE's Radio Pipeline", andin
> posted it on his Chattanooga Scanner site. The site is still there,
> but the article doesn't seem to be).
> Since I left the RCAF in 1967, I have been working for Bell Canada
> the areas of Microwave and Fiber Optics, so I have a good background
> in how "modern" data communications networks have evolved since the
> 1970s, from 1200-bps modems to T1 and Frame Relay, up to Gigabit
> Ethernet and ATM over ADSL and SONET today. But there's a "missing
> link" (pardon the pun) before ARPANET, when the SAGE network was
> pioneering the concepts of Wide-Area Computer-to-Computer
> communications, that I am anxious to catch up on. I hope to fill in
> those gaps in my knowledge, with the help of members of this Group.
> - Jeff Schallenberg
> Saint Lambert, Qué¢¥c
> So I trust in your indulgence in pointing me to resources either in
> your archives