[ih] ARPA initial IMP-IMP line speed

[David L. Mills]

Chris,

The IMP interface is described in BBN Report 1822, which I have. There
were companion documents for the Digital Equipment IMP-11A interface for
the PDP-11 Unibus which I don't have. My first ARPAnet connection at
COMSAT Labs was a 4800-bps analog link to BBN; later I connected with
56-kbps DDS and IMP 29 at Mitre. Toward the end of ARPAlife I connected
from UDel via 56-kbps DDS to IMP 112 somewhere in WashDC. Scary to think
now I have 100-Mbps desktop-desktop just about anywhere in Internet2.
How the heck did we get along with only a 50-kbps network?

Dave 

Chris Edmondson-Yurkanan wrote:
> 
> Toru,
> at this point I want to make sure which documents you have read on the
> IMP hardware impl. and design... since I suggested [ih] to you.
> 
> Have you read the 1970 paper on
> The interface message processor for the ARPA computer network
> (by Heart, Kahn, Ornstein, Crowther, and Walden)
> 
> And the Arpanet Completion Report section on phone carriers, etc
> (on my digital archive)
> and the RFQ proposal? (on my digital archive)
> 
> And I expect that you would enjoy the materials that Katie Hafner donated
> to the www.archive.org: (such as pieces of the BBN response to the RFQ,
> and BBN's first quarterly report?) (both of which I only found today,
> while searching for IMP materials for you)
> 
> Thanks, Chris
> 
> --
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