Starplus Triad Xts Installation Manual

							Product Description1-3
Chapter 1 - Introduction
Product Description
Introduction
TheXTSDigital Key Telephone System is a hybrid Key Telephone System, designed to meet the
telecommunication needs of medium or large sized business offices.
TheXTSSystem incorporates state of the art digital technology for command processing and
voice switching, utilizing a Pulse Code Modulation/Time Division Multiplexing (PCM/TDM, “A”
law or “U” law) distributed switching matrix.
TheXTSachieves a high level of flexibility by:
†Employing a Universal Card Slot architecture in up to three Cabinets that house plug-in
Printed Circuit Boards.
†Providing support for different types of instrumentation.
System Design
TheKeyServiceUnit(KSU)oftheXTSis a wall-mounted cabinet that houses the MB (Mother
Board) and card slots for the CO line/Key Station/SLT/ISDN/VoIP interface boards, and other
useful boards.
In this system, the first unit is Cabinet 0. Second and third units (Cabinet 1 and Cabinet 2)can
be added to increase capacity. The MPB should be installed in the fixed MPB slot in Cabinet 0.
To add Cabinets, the LMU1 should be installed in the fixed LMU slot in Cabinet 0. LMU2 can be
used in the fixed LMU slot of Cabinet 1 or Cabinet 2 and is connected with linked cable.
The system architecture is designed to allow a high level of software control over the systems
hardware. The software incorporates a vast array of features and capabilities including PC
Database Administration, Least Cost Routing, ACD, etc.
System Flexibility
TheXTSsystem supports numerous digital keysets and analog single line devices. With the
keysets, commonly used features are activated by direct button selection.
Many functions may be accessed by dialing specific codes or optionally by assigning these dial
codes to Flexible Buttons on the keyset. In addition to key telephones, an optional DSS/BLF
Console is available.
With the flexibility of theXTSextensivefeaturecontent,andthecapabilitytouseanarrayof
instruments, theXTScan be tailored to meet the short and long term needs of the most
demanding customer requirements. 
						

							1-4Product Description
Chapter 1 - Introduction
Key Service Unit
The Key Service Unit (KSU) is a metal frame cabinet designed for wall or rack mounting. It
contains a backplane with connectors that include a PSU slot, 9 universal slots, an MPB slot, an
LMU slot, a RAU slot, and PFTU and RGU connectors. TheXTSKSU consists of Cabinet 0 and can
include optional Cabinets 1 and 2 for added capacity. Cable ties are located on the front edge
of the cabinet to allow connecting cables to be stored neatly.
The connecting cables for the stations and CO Lines exit through the outlet in the bottom of
KSU and can be connected to the Main Distribution Frame (MDF) or to a user installed
termination point.
Figure 1-1: KSU Structure
Figure 1-2:XTSDefault Card Layout for Cabinet 0
CABINET 0 CABINET 2
CABINET 1
SLOT0123456789
CARDD
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2
4D
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2
4D
T
2
4S
L
1
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EL
C
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8L
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B 
						

							Product Description1-5
Chapter 1 - Introduction
There are nine universal slots in the MB (slots 0-8). Any kind of peripheral card can be installed
in the universal slot, but a peripheral card that contains a CPU cannot be installed in Slot 8 of
Cabinet 0 (T1, PRIB, BRIB, VOIP, LCOBC, SLIBC). There are fixed slots for the PSU, PFTU, MPB, LMU,
RGU3, and RAU.
Power Supply Unit
A Power Supply Unit (PSU) is required in each Cabinet of the Key Service Unit. The PSU converts
commercial AC power (110 - 127 / 220 - 240V AC @ 50-60 Hz) to DC voltages, regulates the
voltages, and provides the appropriate DC voltages to the backplane for distribution to other
system components. Three DC outputs are provided: ±5V DC, +30V DC. LEDs in the PSU front
panel indicate valid outputs as well as the presence of AC input power.
The PSU includes circuitry to charge externally connected 24-volt batteries and controls
operation of the battery back-up circuits. The PSU will provide system operating voltages from
the batteries if commercial AC power fails. The battery back-up control circuitry is incorporated
in the PSU to disconnect the batteries prior to a deep discharge or over-charge.
Ring Generator Unit
The Ring Generator Unit (RGU3) provides the ring voltage to the SLIB circuits to ring the SLT. The
RGU3 also provides the input to the Message Wait source on the SLIB cards. The output of the
RGU3 is 65V AC, 25 Hz. The RGU3 can support simultaneous ringing for 15 SLTs.
The RGU3 is fitted on the lower right side panel inside the Cabinet.
Main Processing Board
The Main Processing Board (MPB) 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. The two MPBs available for
use with theXTSare the MPB1 and MPB2.MPB1is used for asingle-cabinetinstallationonly.
MPB1
The MPB1, incorporates the systems RAM, master clock, 2 RS-232C ports, and the systems PCM
voice processing and main micro-processor. The microprocessor is a 32-bit high speed“RISC”
CPU which receives and transmits signaling information from/to other PCBs, controls feature
activation, and PCM time-slot interchange. The MPB has 4 built-in DTMF receivers.
LD1 is the PLLU Synchronization Indicator. This LED will be lit when the PLLU on the MPB has
synchronized with an external clock signal provided to the KSU via a BRI, PRI, or T1 circuit.
LD2-LD9 indicate the operation of the XTS system. LD10-LD13 are reserved for future use.
The MPB1 has the same features as the MPB2 described below, but does not include the
following: Paging Port, MOH Port, Port 5, or Ethernet Jack.
The Real-Time Clock and the 2 MB of SRAM that is associated with the system database are
protected in cases of power loss by a long life-high energy lithium battery. Onboard ROM
contains PCM tone, gain table, etc. needed for digital voice processing.
The 4 MB of flash ROM on the Program Module Unit (PMU) for the MPB1 contains basic system
operating software. A Modem Unit (MODU) can be installed on the MPB, for remote
programming.TheMPBcanonlybeinstalledintheMPBslotinCabinet0.
»Add-on Boards: MODU and PMU 
						

							1-6Product Description
Chapter 1 - Introduction
MPB2
The MPB2, incorporates the systems RAM, master clock, 1 external MOH port, 1 external paging
port, 2 RS-232C ports, and the systems PCM voice processing and main micro-processor. The
microprocessor is a 32-bit high speed“RISC”CPU which receives and transmits signaling
information from/to other PCBs, controls feature activation, and PCM time-slot interchange.
The MPB has 4 built-in DTMF receivers.
LD1 is the PLLU Synchronization Indicator. This LED will be lit when the PLLU on the MPB has
synchronized with an external clock signal provided to the KSU via a BRI, PRI, or T1 circuit.
LD2-LD9 indicate the operation of the XTS system. LD10-LD13 are reserved for future use.
The Real-Time Clock and the 4 MB of SRAM that is associated with the system database are
protected in cases of power loss by a long life-high energy lithium battery. Onboard ROM
contains PCM tone, gain table, etc. needed for digital voice processing.
The 8 MB of flash ROM on the Program Module Unit (PMU) for the MPB2 contains basic system
operating software. A Modem Unit (MODU) can be installed on the MPB, for remote
programming.TheMPBcanonlybeinstalledintheMPBslotinCabinet0.
»Add-on Boards: MODU and PMU
Miscellaneous Board
The Miscellaneous Board (MISB) incorporates the circuitry and interfaces for common optional
features including:
External Paging 2 ports
External Control Contacts 4 contacts
External BGM & MOH 2 ports
Alarm 1 input
RS-232C (optional SIU) 2 ports
An RJ21-type female connector is mounted on the front edge of the MISB for the connection
to the above circuits, except RS-232C serial interfaces. One MISB board can be installed in Slot 8
of Cabinet 0.
»Add-on Board: SIU
Link Module Unit
The Link Module Unit (LMU) provides a link between the Cabinets of the KSU. LMU1 must be
installed to connect the Cabinet 0 to the Cabinet 1. The LMU2 is used to connect Cabinets 1
and 2. Signals are transmitted or received via linked cable. 
						

							Product Description1-7
Chapter 1 - Introduction
Extension Boards
Several types of extension boards are capable of supporting various types of telephones as
follows:
Digital Telephone Interface Board
The Digital Telephone Interface Board (DTIB) provides 2-wire interfaces for telephone
connection. Two versions are available (DTIB12 and DTIB24).
The DTIB provides digital voice and data communications to/from digital telephones.
An industry-standard amphenol-type female connector is mounted on the front edge of the
PCB for connection to the station interfaces. In addition, 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.
»Add-on Boards: None
Electronic Telephone Interface Board
The Electronic Telephone Interface Board (ETIB) provides 2-wire interfaces for telephone
connection.
An industry-standard amphenol-type female connector is mounted on the front of the ETIB for
connection to the station interfaces.
»Add-on Boards: None
Single Line Telephone Interface Board
The Single Line Telephone Interface Board (SLIB) provides 2-wire interfaces for telephone
connection. Three versions are available (SLIB, SLIBE, and SLIBC).
Six RJ11 connectors are mounted on the front edge of the SLIB for connection to the station
interfaces. An industry-standard amphenol-type female connector is mounted on the front of
the SLIBE and SLIBC for connection to the station interfaces.
»Add-on Boards: DTRU and MSGU on SLIB, DTRU4 and MSGU48 on SLIBE and SLIBC.
Table 1-1: Extension Boards
Board Name Function
DTIB12 Provides 12 Digital Telephone interfaces
DTIB24 Provides 24 Digital Telephone interfaces
ETIB Provides 12 Analog Telephone interfaces
SLIB Provides 6 Single Line Telephone interfaces
SLIBC Provides 12 Single Line Telephone interfaces with Caller ID
SLIBE Provides 12 Single Line Telephone interfaces 
						

							1-8Product Description
Chapter 1 - Introduction
CO Interface Boards
The types of CO Interface boards are listed in the table and narrative that follow.
Direct Inward Dial Board
The Direct Inward Dial Board (DIDB) provides four analog DID CO interface ports. The DIDB can
be optionally equipped with a DTMF Receiver Unit (DTRU) to detect DTMF tones. If a DIDB is
used, a DTRU is required; it does not necessarily have to be mounted on the DIDB, but it must
be installed within the system.
»Add-on Boards: DTRU
Table 1-2: CO Interface Boards
Board Name Function
DIDB Provides 4 Direct Inward Dial Lines
LCOB Provides 6 Loop Start CO Lines
LCOBC Provides 8 Loop Start CO Lines with Caller ID
LCOBE Provides 8 Loop Start CO Lines
VOIP Provides 8 VOIP interface over LAN
T1IB Provides 24 channels
PRIB Provides 23 bearer channels and 1 data channel
BRIB Provides 2 bearer channels and 1 data channel 
						

							Product Description1-9
Chapter 1 - Introduction
Loop Start CO Line Interface Board
The Loop Start CO Line Interface Board (LCOB) provides 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.
Three versions are available: LCOB, LCOBC, and LCOBE.
The LCOB has three RJ14 modular connectors.
The LCOBE and LCOBC have an RJ21-type male connector.
The LCOB can be equipped with a DTMF receiver unit (DTRU) to detect DTMF tones.
»Add-on Boards: DTRU for LCOB, DTRU4 for LCOBE and LCOBC
Voice Over the Internet Protocol Card
The Voice Over the Internet Protocol (VoIP) card provides up to eight lines per card (two lines
per installed VOIP module). The VoIP card allows bi-directional voice communication to other
devices via an IP network such as an internal Local Area Network (LAN), the Internet, or a Wide
Area Network (WAN) using the Ethernet Interface. It monitors for disconnect while using
minimal bandwidth. It also provides four-digit dialing and other features.
»Add-on Boards: VoIP modules
T1 Interface Board
The T-1 Interface Board (T1IB) provides the T-1 (1.544Mbps, 24-Voice Channel) digital interface
circuit, control circuitry, and synchronous clock control circuits. DTMF tone detection units can
be installed optionally on the T1IB. The T1IB has 8 LEDs on the front edge of the PCB which
indicates errors of T-1 line, in-use status, and synchronous clock enable status.
»Add-on Boards: DTRU4
Primary Rate Interface Board
The Primary Rate Interface Board (PRIB) provides one Primary Rate Interface circuit. Each circuit
contains 23 bearer and one data channel (23B+D). When a PRIB card is programmed into the
system, the system interprets all B channels as trunks. Thus, one PRIB which contains 23B+D
circuits provides 23 line appearances to the system. The PRIB card uses 24 time slots when
installed.
The PRIB must usually be used in conjunction with a Channel Service Unit (CSU). Connection is
made via a DB15 from the PRIB to the CSU. When networking systems that are less than 50 feet
apart, no CSU is required.
The PRIB accepts two DTRU4 boards.
When ordering PRI lines from the telephone company, specify ESF framing and B8ZS line
coding. PRI only supports National ISDN 2 (NI-2). No other standards are supported.
»Add-on Boards: DTRU4 
						

							1-10Product Description
Chapter 1 - Introduction
Basic Rate Interface Board
The Basic Rate Interface Board (BRIB) interface provides four Basic Rate Interface circuits. Each
circuit is comprised of two bearer (64Kbps each) and one data (16Kbps) channels (2B+D). When
a BRIB is programmed into the system, the system interprets all B channels as trunks. Thus, one
BRIB which contains four 2B+D circuits provides eight line appearances to the system. A
maximum of seven BRIBs can be installed into the system (56 B channels).
The BRIB uses the U interface of the BRI standard. Connection to the network is made via RJ45
connectors on the front edge of the board. No CSU is required to connect to the central office.
The BRIB card uses eight time slots when installed.
When ordering BRI lines from the telephone company, specify Capability P as the ordering
code. National ISDN 1 (NI-1) is supported. No other standards are supported.
»Add-on Boards: DTRU4
Add-On Boards
This section describes add-on boards, which can be installed on various types of boards to
support additional functions as shown in the following table.
Dual Tone Receiver Unit
The dual tone receiver unit (DTRU) provides Dual Tone Multi frequency (DTMF) circuits. The two
versions of the DTRU are: the DTRU and the DTRU4.
†The DTRU can be installed on the LCOB, SLIB, or DIDB to provide 2 DTMF circuits.
†The DTRU4 can be installed on the LCOBE, LCOBC, SLIBE, SLIBC, T1IB, or PRIB to provide
4 DTMF circuits.
Table 1-3: Add-on Boards
Board Function Position
DTRU Two DTMF receiver circuits LCOB, SLIB, DIDB
DTRU4 Four DTMF receiver circuits LCOBE, LCOBC,
SLIBE, SLIBC, T1IB,
PRIB, & BRIB
MSGU Provides message waiting light indication on SLTs SLIB
MSGU48 Provides message waiting light indication on SLTs SLIBE & SLIBC
PMU Provides operating software MPB
MODU Provides a 19.2K baud modem for local access MPB
RAU Provides three relay contacts and two alarm
functions (not used)RAU
SIU Provides additional two RS232 serial interfaces. MISB
The resources above are shared across the entire system. 
						

							Product Description1-11
Chapter 1 - Introduction
Message Waiting Unit
The message waiting unit (MSGU) provides a message waiting light indication on single line
telephones.
†One MSGU can be installed on each SLIB (required if message wait indication is needed).
†One or two MSGU48s can be installed on each SLIBE or SLIBC (required if message wait
indication is needed).
Program Module Unit
The CPU operates on code in the flash ROMs in the Program Module Unit (PMU) which contains
the system control, administration, and call processing. The PMU has 8 MB of ROM (4 MB in PMU
for MPB1).
»The PMU must be installed on the MPB.
Modem Unit
The Modem Unit (MODU) (Modulator & Demodulator Unit) provides a communication method
interface for remote maintenance and remote PC Admin. It operates in full-duplex,
asynchronous modes at line rates up to 19.2 Kbps.
The Modem Unit provides an asynchronous modem for access to the system database and fault
reporting features from a remote site. The modem may be connected to a pre-selected CO Line
through the system-switching matrix. The MODU port is independent of the SIU standard
RS-232C port, allowing system database access, etc., without the need to interrupt the SMDR
output.
»The optional MODU is installed on the MPB.
Relay Alarm Unit
The Relay Alarm Unit (RAU) provides three relay contacts and two alarm functions.
Serial Interface Unit
The Serial Interface Unit (SIU) provides an additional two RS-232C (ports 3 & 4) interface circuits
on the MISB. The SIU is useful for SMDR print out and Caller ID. The following is a list of the
system’soutput:
On-line SMDR
Statistical information
Caller ID input
ACD
»The optional SIU can be installed on the MISB. 
						

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Chapter 1 - Introduction