Vodavi Starplus STS Key Telephone System

Nortel Norstar Meridian Business Telephone Systems

2783 Martin Rd.
Dublin, OH 43017
9891 Montgomery, Rd.
Cincinnati, Ohio 45242
2324 Stanley Avenue
Dayton, Ohio 45404

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Ohio TeleCom will Install, Service and Repair Vodavi Starplus Dispatch Voice Mail Systems of all makes and models.
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Vodavi Business Telephone Systems
Vodavi, Vertical, Starplus STS, Triad, STSe, DVX. DHS, Infinite Telephone Systems, Telephones and Dispatch and Talkpath voice mail manuals.

 Starplus STS



Starplus STS Programming PDF 8.5M

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 12×24 configuration for a total capacity of 28×50. 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
 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.
1-4 Key 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 Starplus Dispatch Voice Mail
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)
or T1IB
CO Champ
Sta Champ
CO Champ
Sta Champ
or T1IB
Slot 7
Slot 6
Slot 5
Slot 4
Slot 3
Slot 2
Slot 13
Slot 12
Slot 11
Slot 10
Slot 9
Slot 8
Key Service Unit 1-5
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 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
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.
1-6 Extension 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 Boards 1-7
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 Digitalto-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
1-8 Add-On Boards
Chapter 1 – Introduction
Add-On Boards Starplus Dispatch Voice Mail
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.
Configuration Tables 2-3
Chapter 2 – System Specifications
Configuration Tables
The following tables and charts describe system capacities and display the configuration
flexibility of the system.
System Capacity
Table 2-1: Function Capacity
Item Description
Account Codes
Number of digits per Account Code
Number of Account Codes
Up to 12 digits
Unlimited-unverified / 256-verified
Digital DSS/BLF Consoles
Up to 3 stations can be designated as attendant(s).
Each DSS/BLF unit requires 1 station port and reduces station
capacity by 1.
DSS/BLF Maps may not be duplicated at one station.
One station may have up to 3 DSS units associated with it.
CO/PBX/Centrex Lines Starplus STS
Digital Terminal Stations
Standard Single Line Telephones
24 (max) Loop Start (4 per LCOB)
48 (max) Digital Terminals (8 per DTIB)
22 (max) SLTs (4 per SLIB4, 2 per SLIB2)
Parties per “bridge”
10 Conference “bridges” per system
8 parties per “bridge”
Contacts (multipurpose) 1 (on BKSU)
DISA Circuits: Unlimited CO lines may be programmed simultaneously
DTMF Receivers
DTMF Sender
2 (2 on BKSU, Each SLIB has 2 DTMFs on board)
No limit
Hunt Groups
Software supports 8 Groups
Software supports up to 8 stations in each Group
Station, Pilot, or All Ring Hunting
I/O Ports 2 (both on BKSU)
Music Channels
Music-On-Hold/Background Music inputs 1 Channel per system (on BKSU)
Internal Paging
External Paging (one or two way paging)
8 (max) Internal Page Zones (software controlled)
1 (on BKSU)
Speed Dial Memory
Station Speed Dial
System Speed Dial
Total System Speed Dial bins
20 Bins per Station (24 digits)
80 Bins per System (24 digits)
2-4 Visual Specifications
Chapter 2 – System Specifications
Visual Specifications
CO Line Buttons
UCD Groups
RAN Announcements
Calls In Queue
Software supports 8 Groups
Eight RAN announcements per system
All CO Lines (28) may be in queue for a UCD Group
Voice Mail Groups
Members (ports)
Integration Method
VM Message Wait
VM Disconnect Signal
Software supports 8 Groups
Software supports up to 24 stations in each Group
In-Band Signaling (DTMF)
[420] to turn on, [421] to turn off
Programmable 12 digit (DTMF) string. (If no digits are
programmed, 15 secs of silence are followed by a busy tone and
Loop interrupt.)
Table 2-2: Visual Signals – CO Line Buttons
Feature/Function Flash Rate
Incoming CO Ringing 30 ipm flash
CO Line in the Transfer mode 120 ipm flash
CO Line Recalling 480 ipm flutter
System HOLD 60 ipm double wink
Exclusive HOLD 120 ipm flash
I-HOLD 60 ipm wink
CO Line Queue Call Back 480 ipm flutter
CO Line in use ON steady
CO line Idle OFF
Table 2-1: Function Capacity
Item Description
Visual Specifications 2-5
Chapter 2 – System Specifications
DSS/BLF Buttons
Feature/Function Buttons
Table 2-3: Visual Signals – DSS/BLF Buttons
Feature / Function Flash Rate
Off-Hook (busy) ON steady
Incoming Intercom Ring 120 ipm flutter
Call Announce (H or P mode) Steady
Message Waiting Call Back 120 ipm flutter
Station in Do Not Disturb 480 ipm double flash
Camp On (by station) 120 ipm flash
Auto Call Back 120 ipm Flash
Station Unavailable 60 ipm flash
Table 2-4: Visual Signals – Feature / Function Buttons
Feature / Function Flash Rate
ON/OFF Button (while activated) ON steady
MUTE Button (when activated) ON steady
SPEED Button (while dialing) ON momentarily
FLASH Button (while depressed) None
TRANSFER Button (while depressed) Steady until TRANSFER complete
HOLD Button (during “T” ICM call) 15 ipm Flash
DND Button – when activated 60 ipm flash
FWD Button
All Forward
Busy forward
No answer forward
B/NA forward
ON steady
ON steady
ON steady
ON steady
MSG Button (when activated) 15 ipm flash
2-6 Tone Specifications
Chapter 2 – System Specifications
Tone Specifications
Audible Signals
The Terminals provide ringing and confidence signals to the user and to calling parties
according to Table 2-5 and Table 2-6 .
Table 2-5: Signals To Called Station (Digital Station)
Feature (Indication) Sound In Hz Occurrence (Cadence)
Incoming CO Line (*User Selectable) .8 sec on/2.4 sec off repeated
Intercom Tone Ringing (*User Selectable) .4 sec on/.4 sec off/
.4 sec on/2 sec off repeated
Intercom Call Announce (H & P) 935 .2 sec on/.2 sec off; 2 bursts
Transferred CO Line (*User Selectable) .8 sec on/2.4 sec off repeated
Line Recall (*User Selectable) .2 sec on/.6 sec off repeated
Message Waiting Call Back (*User Selectable) .4 sec on/.4 sec off/
.4 sec on/2 sec off repeated
Queued CO Line Call Back (*User Selectable) .2 sec on/.6 sec off repeated
Camp On 935 .2 sec burst
Alarm Tone – Repeated
– Single (continuous)
701/857 Starplus Dispatch Voice Mail
.25 sec on/.25 sec off; repeated
1.0 sec on; once (every 30-60
secs until alarm is reset.
* Only one tone can be selected by a station at a time. This tone will be used for all signaling that uses
the “User Selectable Tone”.
Miscellaneous Specifications 2-7
Chapter 2 – System Specifications
Miscellaneous Specifications
Table 2-6: Signals To Calling Station
Feature (Indication) Sound In Hz
Sta SLT Occurrence (Cadence)
Intercom Ring Back Tone 1215/1471 440/480 .5 sec on/2.5 sec off;
Intercom Call Announce 935 935 .2 sec on/.25 sec off;
three (3) times
Busy Tone 701 480/620 .5 sec on/.5 sec off;
Error Tone 701 480/620 .25 sec on/.25 sec off;
Intercom dial Tone 420 440/1350 Continuous
DND Tone 701 701 .2 sec on/.2 sec off;
three (3) times pause,
Paging Confirmation Tone 935 935 1 second burst
CONFERENCE Time Out Warning Tone 420 701 1 second burst
Programming Confirmation Tone 1471 935 3 short bursts
Programming Error Tone 1471 1471 .25 sec on/.25 sec off;
six (6) times
Call Waiting 735 735 .5 burst
Table 2-7: Dialing Specifications
Item Specification
CO Type Loop Start / 600 ohm / current sensing
DTMF Signaling
Frequency Deviation
Rise Time
Duration of DTMF Signal
Inter-digit Time
100ms (programmable)
100ms (programmable)
Pulse Dialing
Break/Make Ratio
Dialing Speed
60/40 – 66/33
10-20 pps
2-8 Miscellaneous Specifications
Chapter 2 – System Specifications
Table 2-8: Electrical Specifications
Item Specification
Contact Rating (multipurpose contacts) 1 amp, 24 VDC
External Page Port
Output Impedance
Output Power
600Ω @ 0 dbm
5 milliwatt max
Music Source 600Ω input at 2k ohm maximum from
music source
Power Supply
AC Voltage Input
AC Power
AC Input Fuse
DC Output Voltage
105 -129 Volt AC @47-63Hz
300 watts Starplus Dispatch Voice Mail
+5a 250v Starplus STS
+ 30v
Table 2-9: Environmental Specifications
Item Degrees (ºF)
Operating Temperature 32 – 104
Optimum Operating Temperature 60 – 80
Storage Temperature -40 – 140
Relative Humidity 5 – 90% (non-condensing)
Table 2-10: Dimensions and Weights
Height Width Depth Weight
in mm in mm in mm lbs kg
KSU (w/o cover) 11.125 283 15 381 4.625 117 11 4.9
Digital Keyset 9.25 234 7.625 194 4.75 121 2 0.9
Digital DSS/BLF Console 9.25 234 4.9 124 3.3 84 2 0.9
System Part Numbers 2-9
Chapter 2 – System Specifications
System Part Numbers
The following table may be used to order the STS system parts that are currently available.
Table 2-11: STS Part Numbers
Description Part Number
STS Basic Key Service Unit (BKSU) 3500-00
STS Expansion Key Service Unit (EKSU) 3502-01
Caller ID Unit (CIDU) 3531-04
Digital Key Telephone Unit (DKTU) – 24 Button 3515-71
Digital Telephone Interface Board (DTIB) (8 port) 3532-00
DSS – 48 Button 3510-71
DTMF Receiver Unit (DTRU4) (4 circuit) 3031-60
Loop-Start Central Office Board (LCOB) w/caller ID (4 port) 3531-03
Message Wait Unit (MSGU48) 3033-10
Modem Unit (MODU) – 9600 baud 3530-30
Phase Lock Loop Unit (PLLU) 8030-40
Single Line Adapter (SLA) 9854-00
Single Line Telephone Interface Board (SLIB2) (2 port) 3533-01
Single Line Telephone Interface Board (SLIB4) (4 port) 3533-00
T1 Interface Board (T1IB) (24 channel D4AMI / B8ZS) 3531-31
VM Interface Board (VMIB) (Flash-based – 3 hour) 3534-00
VM Interface Board Memory Expansion Module (Flash-based
upgrade – addl 6 hrs)
3534-01 Starplus STS
VM Interface Board (VMIB) (Pentium-based) future
2-10 System Part Numbers
Chapter 2 – System Specifications
3 Installation
This chapter provides the basic system installation and wiring instructions for the STS, as well
as how to install the optional cards and interface units.
Installation Overview 3-3
Chapter 3 – Installation
Installation Overview
Basic Process
As with any sophisticated communications device, installation of the STARPLUS STS System
requires the care and forethought of a competent technician. To assure easy servicing and
reliable operation, several factors must be considered when planning the system installation.
The following procedures are provided to help ensure a successful system installation: Starplus Dispatch Voice Mail
 Site Preparation
 KSU and Power Supply (PS) Installation
 PCB Installation
 System Wiring Starplus STS
 Keyset and Terminal Installation
 Basic Installation Check-Out
 System Programming and Verification
To install the STARPLUS STS System as quickly and efficiently as possible, complete the
following detailed instructions as described.
Site Preparation
General Site Considerations
The first step is to locate an acceptable site for the common equipment (KSUs, boards, etc.).
When locating a mounting site for the KSUs, the following points must be considered:
Wall Mounting — The KSUs are designed for wall mounting and should not be mounted
directly to a masonry or plasterboard wall. It is recommended that a minimum of ½-inch
plywood backboard be firmly mounted to the wall, and the KSU and MDF be mounted to the Starplus STS
Dedicated Access — The location must have access to a dedicated 110 Volt AC (±10%), 60 Hz,
single-phase circuit with a circuit breaker or fuse rated at 15 amps. A 3-wire parallel blade
grounded outlet should be within approximately 6 feet of the lower left rear of the BKSU
Grounding — The location must have access to a good earth ground, such as a metallic cold
water pipe without non-metallic joints. The ground source should be located as close as
possible to the system.
Environment — The system should be located in an area that is well ventilated with a
recommended temperature range of 68°-78° F and a relative humidity range of 5-60%
3-4 Site Preparation
Chapter 3 – Installation
Distance Parameters — The system location should be within 25 feet of the telephone
company’s termination point. Also, the location should be within the prescribed station loop
lengths for all keysets and terminals. If existing cabling is used, its location and conduits should
be considered. Station wiring should be in the building. Station ports are not designed for
installation outside of the building.
Accessibility — The location should have adequate accessibility, space, and lighting for future Starplus STS
servicing and should consider the need for future expansion.
Hazard Protection — The system should be located in an area that is protected from flooding,
flammable materials, excessive dust and vibration.
Interference — The site should be away from radio transmitting equipment, arc-welding
devices, copying machines, and other electrical equipment that are capable of generating
electrical interferences. Operation of this equipment in a residential area is likely to cause
interference. In which case the user, at his own expense, is required to take any necessary
measures to correct the interference.
Backboard Installation
Material — A wooden backboard is recommended for all installations and must be installed
when the location has masonry or plasterboard walls. A minimum of ½-inch plywood material
is sufficient for most installations.
Placement — The backboard should be mounted at a convenient height, about three feet
above the floor and be bolted in various places to distribute the weight of the system.
Clearance — Space should be available on the bottom side of the backboard for the MDF
cabling and for optional equipment such as a music source, battery backup, etc.
System Layout — It is recommended that the location of each major item be roughly sketched Starplus STS
on the backboard as an installation layout.
Verify On-Site Equipment
Once the equipment installation site is identified and a dedicated AC outlet, earth ground, and Starplus Dispatch Voice Mail
lighting and ventilation are available:
1. Verify that all equipment required is on-site and was not damaged during shipment.
2. Unpack the KSUs to assure there is no shipping damage.
3. Notice that a mounting template is packed with the BKSU; this template is required later
in the installation.
4. Check that the type and quantity of boards received is correct and optional equipment
and a Power Line Surge Protector are on-site.
It is not necessary to unpack the individual boards at this time.
If any equipment is damaged or missing, notify the appropriate personnel to
correct the situation.
KSU Mounting 3-5 Starplus STS
Chapter 3 – Installation
KSU Mounting
The STARPLUS STS System consists of a Basic Key Service Unit (BKSU) cabinet. When additional
CO lines and stations are needed, the Expansion Key Service Unit (EKSU) cabinet must be
mounted above the BKSU. Both units have been designed to be compact and lightweight for
easy handling during installation.
Basic Cabinet Starplus STS
The BKSU consists of a plastic frame and cover designed for wall mounting. The KSU must NOT
be mounted on a masonry or dry-wall surface; a wooden backboard is required.
A mounting template is included with the BKSU. This template can be used to drill pilot holes
for mounting screws. Note that the template provides screw hole locations for the BKSU and
EKSU. The BKSU is mounted with three #10 or larger, 1½ inch or longer screws.
1. Drill pilot holes in the locations marked.
2. Insert the screws and tighten, leaving about ½ inch exposed.
KSU Template Starplus STS
Mounting the BKSU
11 1/2”
4 5/8”
11 1/8”
4 1/8”
3 1/4” 3 3/4”
3-6 System Preparation Starplus STS
Chapter 3 – Installation
Expansion Cabinet
The EKSU consists of a plastic cover and frame designed for
wall mount installation.
» » » The EKSU must be mounted above the BKSU.
After positioning the EKSU above the BKSU:
1. Attach the EKSU to the BKSU on both sides, using the
four screws and two brackets provided.
2. Mark the location of the two screws to mount the
BKSU.The EKSU must NOT be mounted on a masonry
or dry wall surface; a wooden backboard is required.
The EKSU is mounted with two #10 or larger, 1½ inch or
longer screws.
3. Drill pilot holes in the two locations marked, insert
screws and tighten, leaving about ½”.
4. Mount the EKSU on the screws and tighten the screws
Interconnection is achieved via an amphenol-type
connector and power cable, both included. The amphenol
connector connects the EKSU to the BKSU on the left side
through connectors labeled EXP.
System Preparation Starplus STS
KSU Grounding
To ensure proper system operation and for safety purposes, a good earth ground is required.
A metallic COLD water pipe usually provides a reliable ground. Carefully check that the pipe
does not contain insulated joints that could isolate the ground. In the absence of a COLD water
pipe, a ground rod or other source may be used.
A #12 insulated AWG or larger copper wire should be used between the ground source and the
KSU (BKSU and EKSU, respectively). The wire should be kept as short as possible (recommended
25 feet or less). Starplus Dispatch Voice Mail
Grounding Instructions
1. Remove about 1½ inches of insulation from both ends. Attach one end of the wire to the
Ground Lug on the lower side of the BKSU and on the lower side of the EKSU by inserting Starplus STS
the wire under the lug screw, then tighten the screw securely.
2. Attach the other end of the wire, as appropriate, to the ground source.
3. Take a DC resistance reading and an AC volt reading between the chassis ground point
(cold water pipe) and AC ground (third wire AC ground). The limit is 5V AC and 5 Ohms DC
resistance. If a higher reading is obtained, choose a different chassis ground point and
repeat this step until a suitable ground point is found.
To ensure proper grounding … make sure to use the brackets provided when
attaching an EKSU to the BKSU.
Expansion KSU
Basic KSU
System Preparation 3-7
Chapter 3 – Installation
Built-in Power Supply
The built-in Power Supply in each BKSU and EKSU will convert 105V- 129V AC power to +5V DC Starplus STS
voltage output. The power capacity of the Power Supply is as follows:
Battery Backup Unit Installation
The Battery Backup Unit (BBU) provides
power for the system during a power failure.
The BBU connects to the STS via the
connector on the side of the BKSU.
Battery Backup Wiring
If local AC power fails, the system can be
equipped to operate from external batteries.
The external batteries must provide 24 Volts
DC. This is generally accomplished by
connecting two 12-volt batteries to the strip
connector on the front of the BBU as shown.
The BBU provides charging current to the batteries during normal AC power operation at a Starplus STS
maximum of about 0.5 amp. During battery operation, the BBU discontinues battery operation
if AC power is restored or the battery voltage is too low to maintain proper system operation.
System Backup Duration
The length of time the system operates on the batteries is dependent on several elements
including: battery charge state, condition of the batteries, capacity of the batteries, and the size
of the system (number of station ports).
The following chart gives the approximate backup time for several system sizes and different
battery capacities in ampere-hours.
System Battery Replacement – WARNING
In most cases … the system battery will never need to be replaced.
However, in the event that the battery is determined to be fully discharged, use caution when
replacing as it could explode if installed improperly.
» Replace battery with a similar battery type, as recommended by battery manufacturer.
» Dispose of the used batteries according to the battery manufacturer’s instructions. Starplus STS
+5V DC -5V DC +30V DC Battery Backup
2.5A 0.5A max 2.5A max External 4B-BBU
Ports Starplus Dispatch Voice Mail
Battery Capacity
10AH 20AH
4 16 Hours 32 Hours
8 8 Hours 16 Hours
16 4 Hours 8 Hours
Battery Battery
+ – – +
3-8 System Preparation
Chapter 3 – Installation
Power Line Surge Protection
The AC outlet should be equipped with a power surge protection device or UPS. Systems using
such devices are more resistant to damage from power line surges than unprotected systems.
Power line surges often occur during normal operations and during violent thunderstorms.
Installation of a surge protector meeting the specifications described in the following
paragraph may prevent or minimize the damage resulting from power line surges.The isolation
transformer/surge protector should be: 15 amp self-contained unit that plugs into a standard Starplus STS
grounded 117V AC wall outlet. The wall outlet must be designed to accept a 3-prong plug (two
parallel blades and a ground pin). The protector should be fast and capable of protecting
transients greater than 200 volts.
Lightning Protection
The system provides secondary protection per UL 1459 specifications. Primary protection
circuitry is the installer’s responsibility and should be installed per National Electric Code (NEC).
KSU AC Power Plug
Before plugging the KSU power cord in the AC source (grounded, 3-prong AC outlet required):
1. Verify the power switch of the BKSU is off.
2. Plug the KSU power cord into the AC outlet.
3. Turn the power switch on.
Cable Connections
Champ connectors are mounted on the
side of each STS BKSU and EKSU – one for
CO and Miscellaneous connections, one
for Station connections, and one to
connect the BKSU and EKSU. Champ
connectors include the following:
 Ferrite Core — to improve the line
burst immunity on the Champ
 Cable Tie — to secure the Ferrite
Core to the Champ connector.
Ferrite Core
Cable Tie
Champ Connectors
or Misc Starplus STS
To Sta
System Preparation 3-9
Chapter 3 – Installation
PCB Handling and General Installation
The system cards contain digital circuitry which are extremely reliable, but can be damaged by
exposure to excessive static electricity. When handling PCBs, a grounded wrist strap should be
used to protect boards from static discharges. Also, use common sense when handling PCBs.
EXAMPLE — Do not place a PCB in locations where heavy objects might fall on the PCB and
damage components.
Inserting a PCB
1. Hold PCB with components facing left, align top and bottom edge of PCB in card guides.
2. Slide the card into the system seat the PCB firmly into the backplane connector.
3. To remove a PCB, reverse the process.
Card Slot Configuration
Board Capacity
The following types of expansion boards may be installed to increase the Station and CO
capacity of the STS System:
DO NOT install or remove any boards with power applied.
Make sure power is turned off prior to installation or removal of the PCBs
Board Description System Capacity
LCOB 4 Loop CO Start Lines
(includes Caller ID)
up to 24 CO lines
DTIB 8 Digital Telephone Ports up to 48 stations
4 Single Line Ports
2 Single Line Ports
up to 20 stations
2 stations
T1IB 24 Channels —
VMIB 8 Voice Mail Ports —
3-10 System Preparation
Chapter 3 – Installation
Card Slot Positions
This illustration shows the designated slot number for each type of board that can be mounted Starplus Dispatch Voice Mail
in the BKSU and EKSU.
IMPORTANT — Make sure to place the correct board in the appropriate card slot.
Slot 7
Slot 6
Slot 5
Slot 4
Slot 3
Slot 2
Slot 13
Slot 12
Slot 11
Slot 10
Slot 9
Slot 8
Card Slot Board
11 LCOB / T1
12 LCOB / T1
13 LCOB / T1 / VMIB (Flash- or Pentium-based)
Card Slot Board Starplus STS
0 DTIB (fixed)
1 LCOB (fixed)
2 SLIB2 – 2 port (default)
5 LCOB / T1
6 LCOB / T1
7 T1 / VMIB (Flash- or Pentium-based)
BKSU & Main Board Unit Assembly 3-11
Chapter 3 – Installation
BKSU & Main Board Unit Assembly
The BKSU includes the fixed DTIB in slot 0, a fixed LCOB in slot 1, and a SLIB2 in slot 2. This
provides an initial capability of four CO lines, eight digital telephone stations, and two single
line telephone stations. Additional cards/boards can be added to increase capability.
The BKSU provides the following miscellaneous features:
 1 external page port that is connected to a transformer, providing a 600-ohm impedance.
 1 music input that is connected to a transformer, providing a 600-ohm impedance.
 1 independent dry relay contact rated at 1 amp, 24V DC.
 2 DTMF receivers.
These features are provided through the CO amphenol “Champ” connector on the right side
of the BKSU. These features are controlled by system software.
Main Board Unit
The Main Board Unit (MBU) is installed in the BKSU at the factory before the shipment. The MBU
contains a lithium dry cell to maintain memory and real-time clock functions.
The MBU can be equipped with 3 daughter boards: MODU for modem access to the system,
PLLU, and CIDU for Caller ID (refer to “Expansion Board Installation” on page 3-14). System
software is contained on two chips labeled U1 and U2.
The battery is soldered to the MBU and connected to the circuitry by an ON-OFF dip switch
» Make sure that dip switch SW4 is turned to ON before programming the system database.
Initialize Default Settings
Before programming the system, switch 8 (SW5) should be placed in the ON position and
powered off and on to initialize the system database to default.
Retain Database
Once the database is initialized, switch 8 (SW5) should be placed in the OFF position to protect
the database. The following diagram shows the dip switch position as they relate to the
“database” functions: Starplus STS
Dip Switch
Position Function
Retain the database
Flush the database
3-12 BKSU & Main Board Unit Assembly
Chapter 3 – Installation
Digital Telephone Interface Board (built-in)
The MBU of the BKSU contains a built-in Digital Telephone Interface Board (DTIB) which
provides digital voice and data communications to/from digital telephones. The DTIB Starplus Dispatch Voice Mail
provides the interface to eight digital telephones. The built-in DTIB is non-removable and
does not physically resemble the optional DTIB. It is located in slot 0 on the MBU. The location
of slot 0 is an “L” shape that runs vertically along the left side of slot 7 and horizontally across
the base of the MBU. Additional DTIBs can be installed to expand the capacity for digital
telephones. Refer to “Digital Telephone Interface Board” on page 3-14.
Loop Start CO Interface Board (with Caller ID)
The built-in Loop Start CO Interface Board (LCOB) supports up to four Loop Start Central Office
Lines and comes equipped with a Caller ID Unit (CIDU) to detect Caller ID information. The
built-in LCOB is non-removable and does not physically resemble the optional LCOB. It is
located in slot 1 on the MBU. The location of slot 1 is in the upper right section of the BKSU.
The CIDU provides four Caller ID interfaces for the Built-In LCOB.
Additional LCOBs can be added to provide for increased Loop Start CO Line capability. Refer to
“Loop Start CO Interface Board (with Caller ID)” on page 3-14

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