Single Line Telephone Interface Board (4 Port); Co Interface Boards; Loop Start Co Line Interface Board; T1 Interface Board - STARPLUS STSe Key System Installation Manual

CO Interface Boards

Single Line Telephone Interface Board (4 port)

The Single Line Telephone Interface Board (SLIB4/SLIBC) provides four standard 24V 2500-type
Single Line interfaces. The Single Line station circuit specifications for the SLIB4/SLIBC are as
follows:
One-pair wiring to SLT devices
24 V power for all four circuits
RGU power for all four circuits
Optional Message Wait Unit (MSGU4) (4 circuit)
Loop interrupt
CO Interface Boards
The types of CO Interface boards that can be added to the STSe System are listed in the table
and narrative that follow.

Loop Start CO Line Interface Board

The optional Loop Start CO Line Interface Board (LCOB) provides four Loop Start CO Lines which
support pulse/DTMF signal.
Each interface contains ring and loop current detection circuits, Analog-to-Digital and Digital-
to-Analog conversions, and pulse and ground flash signaling circuits.
The LCOB contains LEDs to indicate the in use status of each CO Line. The trunk circuit
specifications include: 50-pin amphenol connectors (located on the side of the KSU), Loop
detector, and Hybrid CO circuit.

T1 Interface Board

The T1 Interface Board (T1IB) provides the T1 (1.544Mbps, 24-Channel) interface circuit, control
circuitry, and synchronous clock control circuits.
DTMF tone detection units can be installed optionally on the T1IB.
The T1IB has eight LEDs on the front edge of the PCB which indicates errors of T1 line, in-use
status, and synchronous clock enable status.
STARPLUS STSe - Installation Manual
Board Name
LCOB Provides 4 Loop Start CO Lines
T1IB Provides 24 channels
PRIB Provides 23 bearer channels and 1 data channel
Function
1-7
Chapter 1 - Introduction
August 2005