PDIU-DSt
Stand-alone data interface unit-
used for modem pooling, printer
sharing, and access to a host/main-
frame computer.
PEKU
Electronic key telephone interface
unit-station port PCB-supports
eight electronic telephones.
PEMU
E & M TIE line unit-supports four
Type I E & M TIE lines.
PEPU External page interface unit.
PESU
Combination standard/electronic
telephone interface unit-station port
PCB-supports two standard tele-
phones (or peripheral devices) and
four electronic telephones.
STRATA DK
GENERAL DESCRIPTION
DECEMBER 1990
PIOU
Option interface unit-PCB that sup-
ports peripheral options.
PIOUS ‘Option interface-unitia reduced
version of the PIOU PCB that sup-
ports peripheral options.
PSTU Standard telephone interface unit-
optional PCB interface for eight stan-
dard phones (or peripheral devices).
RAM Random access memory.
ROM Read only memory.
-f Requires Release 3 software.
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