Key Service Unit
1-5
Chapter 1 - Introduction
STARPLUS STSe - Installation Manual
August 2005
Basic System Configuration
DEFAULT
-- The following extension boards are installed in each BKSU and will support the
following types of CO lines / stations:
Main Board Unit
The Main Board Unit (MBU) controls and manages communication between peripheral
interface, supervises all resources in the system, controls gain adjustment of PCM signal,
generates system tone, and manages call processing of the system.
PERIPHERAL & DAUGHTER BOARDS -- The following can be installed on the
BKSU’s MBU:
1 - Modem Unit
2 - Digital Telephone Interface Boards (8 port)
1 - T1 Interface Board (24 channels) & 1 Phase Lock Loop Unit
2 - Single Line Interface Boards (4 port) & 2 Message Wait Units
1 - Primary Rate Interface Board (24 channels)
1 - VM Interface Board (8 port)
2 - Loop Start CO Line Boards w/caller ID Unit (4 port)
STANDARD CIRCUITRY -- The following circuitry is standard on the BKSU’s MBU:
1 - Music Input (MOH/BGM channel 1)
1 - Relay (s/w assignable)
1 - External page port
1 - Memory battery (lithium)
2 - DTMF receivers
1 - Alarm Sensing Port
2 - RS-232 (DB9) (male)
Single Line Interface Board (2 port)
The Single Line Interface Board (SLIB2) that is included with all BKSUs, provides two standard
24V 2500-type Single Line interfaces. Two SLT connections on the right side of the BKSU use
RJ11 modular connectors.
The Single Line station circuit specifications of the SLIB2 are as follows:
One-pair wiring to SLT devices
24 V power for both circuits
RGU power for both circuits
Built-in Message Wait Unit (MSGU) (2circuit)
Loop interrupt
Standard Boards
Provides …
DTIB
8 Digital Telephone Lines
SLIB2
2 Single Line Telephone Lines
LCOB
4 Loop Start CO Lines (includes Caller ID Unit)
Summary of Contents for STSe Key System
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