Toshiba Strata DK 280 Installation Manual page 864

RSTU: Standard Telephone interface Unit-An
optional printed circuit board (PCB) with a built-in
ring generator that provides interface for eight-
standard telephones or optional hardware
peripherals (voice mail devices, Background
music source, fax machines, etc.). The RSTU has
a built-in 80V RMS sine wave ring generator. The
RSTU also has connectors for the R48S, which
extends station loop length and is described in this
section.
RSTUS: Standard Telephone Interface Unit-An
optional printed circuit board (PCB) functionally
identical to the RSTU. RSTU2 also contains a 90-
volt DC message waiting/generator/switching
, circuit to operate standard telephone message
waiting lamps.
RWBFI: Wall bracket Fixture-Bracket that is part of
an installation kit (RFIF) that is used to floor mount
systems.
RFMF: Floor Mount Fixture-Fixture that is part of an
installation kit (RFIF) that is used to floor mount
systems.
R48S: Optional 48V Power Supply-Subassembly
that can be connected to the RSTU or RDSU to
extend the loop length of standard telephone
circuits (including the resistance of the phone)
from 600 ohms to 1200 ohms.
[SDN]: Secondary Directory Number.
SMDI: Simplified Message Desk Interface: RS-232 link
from PIOU, PIOUS, RSSU, RSIS, or RSIU
modular jack connected to a voice mail machine to
provide DK280 voice mail integration.
SMIS: Software MIS for ACD.
Tl/DS-1: See RDTU.
CL-6 January 1996