Vodavi Starplus Sts Key System Installation Manual

							1
Introduction
This manual provides the information necessary to operate and maintain the STS System. The 
described features are based on the current software release. If any of these features do not 
work on your system, call your sales representative.
This chapter describes and illustrates the components that may be used with the STS System. 
						

							











 
 
 
 
 
 
						

							General Information1-3
Chapter 1 - Introduction
General Information
System Overview
The STS Key Telephone System supports a maximum configuration of 28 CO/PBX/Centrex lines  
and 50 station devices. The Basic Key Service Unit (BKSU) and Expansion Key Service Unit (EKSU) 
accommodates plug-in boards that can be added to expand CO/STA capacity. Both KSUs can 
generally support a 12x24 configuration for a total capacity of 28x50. The BKSU and EKSU 
cabinets are installed using industry-standard blocks, jacks, and skinny wire cabling. This, 
combined with the ability to program the system using a key terminal with a digital display, 
reduces installation cost and maintenance requirements.
An optional 9600-baud Modem Unit (MODU) facilitates remote programming.
System Interface Boards
The STS system can support the following types of interface boards:

CO card provides 4 loop start lines (LCOB)

Station card provides interface for 2 or 4 single line telephones or 8 digital key telephones 
(SLIB or DTIB)

T-1 Interface Board ( T1IB)

Voice Mail Interface Board (VMIB)
CO Circuitry
All CO interfaces are equipped with transformer barriers for system classification as a FCC fully 
protected system. Each CO circuit supports rotary (out-pulse) dialing and loop supervision 
(disconnect detection) under software control. The DTMF tone signals and system supervisory 
tones can be generated in each keyset or on the main PCB. The STS system uses a proprietary 
tone plan for providing internal progress tones.
System Programming / Database
The system architecture allows system programming changes to be made without interrupting 
state event software control of normal communications. Call processing continues while the 
customer database is updated. All programming changes to the customer database 
programming are made either from a digital terminal (Station 100) or from a terminal 
connected to either an I/O port or remotely via the optional modem board.
Keyset / DSS Console
The STS system features a digital telephone with 24 flexible buttons, 3 interactive soft keys, a 
2 x 24 LCD display, and includes speakerphone capabilities. A 48-button DSS console is also 
available. Each telephone can connect to an optional CTI box. The optional CTI box provides 
data connections and transmissions through an RS-232C connection on the phone.
Software Upgrades
Future software enhancements and upgrades are easily retrofitted and installed in the system. 
This will in most cases, provide backward compatibility with existing Starplus hardware, further 
reducing the cost to upgrade or add features to an installed system. 
						

							1-4Key Service Unit
Chapter 1 - Introduction
Key Service Unit
This diagram illustrates the basic layout of both KSU cabinets, the card slots for the extension 
boards, and the locations of the Champ connectors.
Basic Cabinet
The Basic Key Set Unit (BKSU) has mounting holes so that it can be mounted on the wall. The 
Main Board Unit (MBU) contains the main CPU – MC68LC302, Memory – the memory size is
1 Mbyte (4Mbit x 2), Data is 512 Kbytes (1 Mbit x 4), and all other system-operating type circuitry 
to support the maximum configuration of 28 CO lines and 50 stations.
A power supply board is also installed to provide enough power to support all CO lines, stations, 
and daughter board options. The BKSU has an external power switch to turn power on/off to 
the BKSU and EKSU.
50-pin amphenol connectors are located on the side of the BKSU to provide the interface for the 
Station and CO boards.
Basic System Configuration
DEFAULT -- The following extension boards are installed in each BKSU and will support the 
following types of CO lines / stations:
Standard Boards Provides …
DTIB 8 Digital Telephone Lines
SLIB2 2 Single Line Telephone Lines
LCOB 4 Loop Start CO Lines (includes Caller ID Unit)
Basic
SLIB2  DTIB
or SLIB  LC O B
or T1IB    T1IB
or VMIB 
EKSU 
BKSU CO Ch amp
   (Male) 
Sta Champ
   (Female) 
CO Ch amp
   (Male) 
Sta Champ
   (Female) 
T1IB, LCOB,
or VMIB  LC O B
or T1IB  DTIB
or SLIB 
   Slot 2
 
   Slot 3
 
   Slot 4
 
   Slot 5
 
   Slot 6
 
   Slot 7
 
   Slot 8
 
   Slot 9
 
   Slot 10
 
   Slot 11
 
   Slot 12
 
   Slot 13
  
						

							Key Service Unit1-5
Chapter 1 - Introduction
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 - 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 Por t
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
Ring Generator Unit
The Ring Generator Unit (RGU) provides the ring voltage to the SLIB circuits to ring the SLT. The 
RGU also provides the input to the Message Wait source on the SLIB cards. The output of the 
RGU is 65V AC, 25 Hz. The RGU can support simultaneous ringing for all SLTs associated to the 
SLIB. The RGU is built-into the SLIB2 and into the SLIB4. 
						

							1-6Extension Boards
Chapter 1 - Introduction
Expansion Cabinet
The Expansion Key Service Unit (EKSU) mounts above the BKSU and is connected via cables that 
extend the voice and data signaling to and from the BKSU. An integral power supply provides 
enough power to support all CO lines, stations, and daughter board options.
The EKSU has mounting holes so that it can be mounted on the wall. The station connections 
are via a 50-pin amphenol connector. This connector is located in the EKSU. CO connections are 
50-pin type and are located on the EKSU board.
Built-in Power Supply
A Power Supply is built into each cabinet’s MBU.
The Power Supply converts commercial AC power (105 / 117 / 129 V AC @ 47-63 Hz) to ±5V DC 
voltage output, regulates the voltage, and provides the appropriate DC voltage for distribution 
to other system components.
The Power Supply includes circuitry to charge two externally-connected 12-volt batteries and 
controls operation of the battery back-up circuits. The Power Supply provides system 
operating voltages from the batteries if commercial AC power fails.
Extension Boards
These extension boards are capable of supporting the following types of telephones:
Digital Telephone Interface Board (8 port)
The Digital Telephone Interface Board (DTIB) provides 2-wire interfaces for telephone 
connection. The DTIB provides digital voice and data communications to/from digital 
telephones. This card provides eight standard Digital Telephone Interface circuits and installs 
in the BKSU or EKSU.
An industry-standard amphenol-type female connector is mounted on the side of the KSU for 
connection to the station interfaces.  One LED is mounted on the PCB to indicate the in use state 
of the connected telephones. It will turn on when one or more ports are busy.
The digital station circuit specifications: One-pair wiring to digital devices
Board Name Function
DTIB Provides 8 Digital Telephone interfaces
SLIB4 Provides 4 Single Line Telephone interfaces 
						

							CO Interface Boards1-7
Chapter 1 - Introduction
Single Line Telephone Interface Board (4 port)
The Single Line Telephone Interface Board (SLIB4) provides four standard 24V 2500-type Single 
Line interfaces. The Single Line station circuit specifications for the SLIB4 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 (MSGU) (4 circuit)

Loop interrupt
CO Interface Boards
The types of CO Interface boards that can be added to the STS 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.
Board Name Function
LCOB Provides 4 Loop Start CO Lines
T1IB Provides 24 channels 
						

							1-8Add-On Boards
Chapter 1 - Introduction
Add-On Boards
Message Wait Unit
The Message Waiting Unit (MSGU48) provides a 90V message voltage to light the message 
indicator on single line telephones.
One MSGU can be installed on each SLIB4 (required if message wait indication is needed).
Modem Unit
The Modem Unit (MODU) provides a communication interface for remote maintenance and 
remote PC Admin.
The MODU allows the system to function as follows:

Operates at 9600 baud and installs in the BKSU.

Provides an asynchronous modem for access to the system database and fault reporting 
features from a remote site.

May be connected to a pre-selected CO Line through the system-switching matrix.
The MODU port is independent of the standard RS-232C port, allowing system database access, 
etc., without the need to interrupt the SMDR output.
Phase Lock Loop Unit
The Phase Lock Loop Unit (PLLU) provides clocking for T1, required if T1 card is installed.
The PLLU supplies a 32.768MHz clock to GSXD by either internal clock generator or clock 
received from the trunk card (e.g. T1IB).
Add-On Module Function Board
MSGU48 Provides message waiting light indication on SLTs SLIB4
MODU Provides a 9600-baud modem for local access MBU
PLLU Provides clocking for T1board MBU 
						

							2
System Specifications
This chapter describes the STS system specifications. It also provides a part number listing of 
basic and ancillary components of the system.