V8/usr/man/man4/dk.4

.TH DK 4  local
.SH NAME
dk \- Datakit interface
.SH DESCRIPTION
A Datakit node consists of a fast digital switch
and a number of line modules.
Line modules are interfaced to computers, terminals,
other digital devices.
Certain line modules, referred to as
.I trunks,
connect Datakit nodes together.
Each module may communicate with other modules through
the switch on up to 510 logical channels.
.PP
The directory
.I /dev/dk
consists of character special files,
each one associated with a logical channel.