A circuit-switched digital network, similar to
X.25. Datakit supports host-to-host connections and
EIA-232 connections for terminals, printers, and hosts.
Most of
Bell Laboratories is
trunked together on Datakit.
On top of DK transport service, people run
UUCP for
electronic mail and dkcu for
remote login.
ISN is the version of Datakit supported by
AT&T Information
Systems. Bell Laboratories in Holmdel, New Jersey, uses ISN
for internal data communication.
http://fc.net:80/phrack/files/p18/p18-9.html.
["Towards a universal data transport system", A. G. Fraser,
IEEE Journal on Selected Areas in Communications, SAC-1(5)
pp. 803-16, 1983].