<networking> 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
Bell Laboratories in Holmdel, New Jersey, uses ISN for internal data communication.
["Towards a universal data transport system", A. G. Fraser, IEEE Journal on Selected Areas in Communications, SAC-1(5) pp. 803-16, 1983].