[ih] inter-network communication history
Lawrence Stewart via Internet-history
internet-history at elists.isoc.org
Thu Nov 7 15:19:09 PST 2019
As a minor footnote in internetworking, the Bay Area Packet Radio Network was also used as a transit network for Xerox PUP protocol internetwork packets in 1978/9-ish in a project I worked on with John Shoch.
This was described in a DATACOMM 1979 paper as well as a PARC Blue&White and probably the PRNET reports somewhere. According to the paper, the PUP packets were fragmented into 1-3 PRNet Channel Access Protocol packets, (Not even IP).
By that time, various Xerox sites were interconnected by 9.6 and sometimes faster leased lines. PRNet was used as a hop between PARC and the Ben Wegbreit/Charles Simonyi group farther down the hill.
I found one of the Alto-1822 interfaces in my basement last year (photo attached). This was also used to connect the homemade PDP-10 PARC-MAXC2 to the Arpanet. IIRC it would run at a blistering 1.1 Mbps.
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