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Glossary
RRCS ~ TAPI
Strata DK Programming 5/00 GL-9
Glossary
RRCS Dual-tone Multi-frequency Receiver—An optional upgrade to the system common control unit
(RCTU) that provides Dual-tone Multi-Frequency (DTMF) receivers for system Direct Inward
System Access (DISA) CO lines, E&M tie lines, DID, DNIS and ANI lines, Auto attendant
announcement devices, remote change of call forward-external destination, DNIS external
call routing, and stations and other peripherals that connect to standard telephone circuits.
The RRCS comes in three models: the RRCS-4 (provides four DTMF receivers), the RRCS-
8 (eight DTMF receivers), and the RRCS-12 (12 DTMF receivers).
RSIS Optional RS-232 Serial Interface Unit—A subassembly installed on the RSIU optional
interface unit that allows the system to be connected to any of the following features: voice
mail SMDI, MIS for ACD, SMDR, local DK Admin/DK Backup personal computer, external
maintenance modem, Open Architecture personal computer.
RSIU Optional RS-232 Serial Interface Unit—An optional PCB that provides interface to any of the
following features: voice mail SMDI, MIS for ACD, SMDR, local or remote DK Admin/DK
Backup Personal computer, built-in (RMDS) or external system maintenance modem, Open
Architecture personal computer. By itself, the RSIU PCB provides one interface port. With up
to three RSIU/RMDS subassemblies, it can provide up to four interface ports.
RSTU Standard Telephone Interface Unit—An optional PCB (an older version of RSTU2) 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.
RSTU2 Standard Telephone Interface Unit—An optional 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.
RWBF1 Wall bracket Fixture—Bracket that is part of an installation kit (RFIF) that is used to floor
mount systems.
RWIU/WWIS Strata AirLink Wireless System Interface Unit—A proprietary PCB that enables wireless
telephone functionality to Strata DK 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.
SF Super Frame.
SLT Single-line Telephone.
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 Strata DK voice mail integration.
SMIS Software MIS for ACD.
SSTU Factory-installed sub-unit board that is “piggy-backed” onto the PSTU or PSTU2.
S/T Interface Reference interface points (“S” or “T”) of an ISDN network. S/T interfaces are
RJ-45, 8-wire connection interfaces for ISDN equipment. An NT-1 is needed to network U-
type BRI lines to S/T type interfaces.
TAPI Telephone Application Programming Interface.
Term Definition