[ih] internet-history Digest, Vol 105, Issue 30

Olivier MJ Crepin-Leblond ocl at gih.com
Wed Aug 31 07:22:50 PDT 2016

Dear Craig,

thanks, that's helpful. I've learnt something today. :-)

Now I am aware of the AMPR's work (nicely summarised on
https://en.wikipedia.org/wiki/AMPRNet ). It hints at TCP/IP & a non
routeable Class A being allocated to the AMPR network, with some people
using NAT to carry traffic across -- but was that really done on a
larger scale? I recall regulatory issues at the time, where Packet Radio
was seen as a broadcast medium & you needed your radio license to
operate a TNC. Thus whilst it was legally possible to send out an email
to the Internet from a Packet Radio node, as you held a license to do
so, it was deemed illegal to receive your emails from the Internet to
your TNC - as the sender did not hold a radio license. I am speaking of
1989 so 10+ years later than Bob Kahn's work.
Is the restriction still in place now?
Kindest regards,


On 31/08/2016 15:50, Craig Partridge wrote:
> Hi Olivier:
> What the article hints at, but doesn’t quite say, is that TCP was the
> answer to a question, namely how to do we link packet radio networks
> (and some other
> types of networks) to a network like ARPANET?
> As I recall the story (I arrived on the scene later), Bob Kahn was in
> the process of funding Packet Radio Networks and he and Vint needed to
> solve the
> interconnection problem and that motivated the TCP paper.
> Thanks!
> Craig
> PS: Footnote — originally TCP contained both TCP and what we now call
> IP.  IP was made a standalone protocol after a hallway debate in (I
> believe) 1977.
>> On Aug 31, 2016, at 3:33 AM, Olivier MJ Crepin-Leblond <ocl at gih.com
>> <mailto:ocl at gih.com>> wrote:
>> On 31/08/2016 05:13, Barbara Denny wrote:
>>> For those interested, here is another article related to the Packet
>>> Radio/ARPANET August Internet demo.  BTW, the SFgate article didn't
>>> make it clear that another packet radio located at Stanford was used
>>> to reach SRI.  The November 1977 demo also added a satellite,
>>> SATNET,  to make it a 3 network test.
>>> barbara
>>> How the internet was invented
>>> <https://www.theguardian.com/technology/2016/jul/15/how-the-internet-was-invented-1976-arpa-kahn-cerf?CMP=share_btn_link>
>> Thanks for this link. The mentioning of packet radio raised my
>> interest and I was not aware of the Stanford experiments. Yet I am
>> somehow puzzled as packet radio used AX.25. Thus whilst I understand
>> the packet transmission of data was proven, is packet radio really
>> that closely related to TCP/IP?
>> Kindest regards,
>> Olivier
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Olivier MJ Crépin-Leblond, PhD

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