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GENERAL INFORMATION ON
LIVE
ATC VOICE COMMUNICATION SYSTEMS
BASED ON THE
TROY VCS9808 SERIES
Issue 5 – February 2013
Troy Systems Limited
264 Water Road
Wembley, Middlesex
HA0 1HX
UNITED KINGDOM
+44 (0)208 799 7200
www.troy.co.uk
Copyright © 2013 Troy Systems Limited
CONTENTS
1
2
Introduction ............................................................................................................... 3
1.1
Background ............................................................................................................ 3
1.2
Recent Live Systems ............................................................................................... 3
Description of the Troy VCS9808 ................................................................................ 4
2.1
System Overview .................................................................................................... 4
2.2
VCS9808 Range - Overview of Main Features.............................................................. 5
2.3
Types of Operator Panel ........................................................................................... 7
2.4
Summary of Main User Features ............................................................................... 8
2.4.1 Radio Functions: .................................................................................................... 8
2.4.3 Position Configuration Keys ..................................................................................... 8
2.4.4 Emergency Services Page ........................................................................................ 9
2.4.5 Playback ............................................................................................................... 9
2.4.6 Other Features ....................................................................................................... 9
3
System Architecture ................................................................................................. 10
3.1
Architecture Description ......................................................................................... 10
3.2
Additional Architecture Detail .................................................................................. 11
3.2.1 Position and Line Recording ................................................................................... 11
3.2.2 Multi Channel Recorder Output unit ........................................................................ 11
4
System Hardware ..................................................................................................... 12
4.1
Administrative PC .................................................................................................. 12
4.2
Line Interfaces ...................................................................................................... 12
4.2.1 Introduction ........................................................................................................ 12
4.2.2 Line Interface Module Physical Arrangements........................................................... 13
4.2.3 Line Interface Module Mounting.............................................................................. 13
4.2.4 Typical Cabinet Installation ..................................................................................... 14
4.3 Power Supply Arrangements ..................................................................................... 15
4.3.1 General Arrangements .......................................................................................... 15
4.3.2 Operator Panel Supplies ........................................................................................ 15
4.3.3 Network Switch Supplies ....................................................................................... 15
4.3.4 Line Interface Supplies.......................................................................................... 15
5
Operator Workstation Peripheral Equipment ............................................................ 16
5.1 External Loudspeaker unit ........................................................................................ 16
5.2 Audio Interface ....................................................................................................... 16
5.3 Footswitch.............................................................................................................. 16
5.4 Headsets................................................................................................................ 16
5.5 Telephone Handset .................................................................................................. 17
5.6 Desk Microphone..................................................................................................... 17
6
Further Information ................................................................................................. 17
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TABLE OF FIGURES
Figure.1.1 Typical Operator Workstation HOME page – 12.1” Screen ................................................. 3
Figure 1.2 Typical Operator Workstation HOME page – 8.4” Screen .................................................. 4
Figure 1.3 VCS9808-03 Panel ............................................................................................................... 7
Figure 1.4 VCS9808-01 Panel ............................................................................................................... 7
Figure 1.5 VCS9808-EVCS Panel ........................................................................................................... 7
Figure 1.6 Short Term Position Playback Facility ................................................................................. 9
Figure 1.7 Typical System Arrangements ........................................................................................... 10
Figure 1.8 Dual Channel Line Interface Module.................................................................................. 13
Figure 1.9 Front view of 3U cage fitted with 6 line interface modules............................................... 13
Figure 1.10 Rear view of 3U cage with 6 line interface modules......................................................... 13
Figure 1.11 Rear view of a dual line interface module ........................................................................ 13
Figure 1.12 Line Module Cage installation ........................................................................................... 14
Figure 1.13 Panel Mounting External Speaker Unit ............................................................................. 16
Figure 1.14 Audio Interface for VCS9808-03 Panel.............................................................................. 16
Figure 1.15 Standard Non-Slip Footswitch........................................................................................... 16
Figure 1.16 Standard Binaural Headset with PTT ................................................................................ 16
Figure 1.17 Standard Telephone Handset with PTT............................................................................. 17
Figure 1.18 Standard Telephone Handset with PTT............................................................................. 17
Page | 2
Copyright © Troy Systems Ltd 2013
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TROY VCS9808 – LIVE ATC SYSTEMS
General Information
1
1.1
Introduction
Background
This document provides a detailed description of the well-established Troy VCS9808 series of Voice
Communication Systems currently being provided for Live ATC applications. A separate document
describes the application of the Troy VCS9808 to Custom and Simulator Training Systems.
Troy Systems has been designing and manufacturing ATC Voice Communication & Control Systems
for use in Civilian and Military environments since 1992, and many of the earliest systems remain
in service today.
1.2
Recent Live Systems
Recently supplied live systems
include for Stepanakert Airport in
Armenia,
with
three
operator
positions,
16
radio
and
24
telephone interfaces, a system for
Egilsstadir Airport in Iceland, with
two operator positions, 4 radio and
two telephone interfaces, and for
two airports in Cambodia, Phnom
Penh and Siem Reap, each with two
operator positions and six radio
interfaces. In the last six months
Troy has also supplied a live VCCS
to Shoreham Airport in the UK, and
live EVCS systems to Manchester
and Birmingham Airports in the UK.
The latter system incorporates a
Troy Landing Clearance Indicator
System.
During 2011/12 Troy also supplied
three training systems to the Air
Navigation Service of the Czech
Republic, a total number of 57
training positions, and are currently
building a fourth system with 25
positions for this customer. This is
relevant to live systems because
custom training and live systems
both use the same operator
workstations.
1.3
Current Contracts for Live Systems
Troy is currently manufacturing two further live
VCS9808 systems, one for Sisimuit Airport in
Greenland, 2 positions and 8 radio/telephone
interfaces, and a 41 position system for Kimhae
Airport in South Korea, with up to 70 radio and 120
telephone lines connected.
Figure.1.1
Typical Operator Workstation HOME page
– 12.1” Screen
Full details of all systems delivered
by Troy, together with their
locations and customer details can
be found in a separate document
entitled ‘Troy – Delivered Systems
and Customers’
Page | 3
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2
2.1
Description of the Troy VCS9808
System Overview

These
products
are
the
latest
development of a VCS 9808 series which
was first launched in 1998 and has
benefited from continuous development
up to the present time.
The first
application of the VCS 9808 in 1998 was
a large real-world Flight Test Centre
System for BAE Systems.

The simplicity of the system means that
end customers and system integrators
are choosing to install the system using
their own engineers.
This can
significantly reduce total system cost,
particularly when the installation site is
distant from the UK, such as Cambodia
and India.

The latest VCS9808 series is the result
of
fourteen
years
of
continuous
development, and now provides a stateof-the-art solution for airports and
control centres.
It has no central
processing unit, greatly enhancing
reliability and significantly reducing cost,
particularly for smaller installations.

The only central equipment is the
Administrative PC for the system, and
this plays no part in the communication
process, so has no bearing on the
communication system reliability. Final
system cost is mostly determined simply
by the number of operator panels and
the number of interfaces.

Each line interface module and each
operator position, (OP), is intelligent,
and holds its own copy of the system
configuration,
with
communication
between nodes via dual redundant
Ethernet networks. Thus if only two
nodes, (perhaps an OP and a line
interface), remained operational then
they would still function.

VCS 9808 Operator Panels integrate all
position electronics and the HMI touch
screen into a single compact unit. Three
types of panel are offered, and the
standard versions are designed for
75mm VESA mounting. Panel and Pod
mounting versions are also available.

In live systems all three operator panel
types use the same line interface
modules and peripherals. (The same
operator panels are used in training
systems, but communication lines are
simulated within the VCS and line
interfaces are not required).

Figure 1.2 Typical Operator
Workstation HOME page – 8.4” Screen
The modular and de-centralised nature
of the VCS9808 means that system cost
is almost directly proportional to system
size in terms of number of positions and
number of communication interfaces.
Operator panels and line interfaces are
simply nodes on a dual network, and
their numbers can be reduced or
increased according to the system
requirements. This makes the system
particularly cost effective for smaller
airports and control centres.
Page | 4
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2.2

VCS9808 Range - Overview of Main Features
Operator
Panel
functions
and
features are individually tailored to
the requirements of each system,
using a comprehensive library of
functions and features.

The VCS9808 series is a fully
distributed system.
There is no
concept of a central processing unit,
which would represent a single point
of failure.

The system has an Administrative
PC, (APC), which monitors the
system, and allows minor system
reconfiguration.
It DOES NOT
participate
in
system
communications, and indeed does
not have to be present for system
function.


Each OP and each LIM is intelligent,
and contains a powerful sub compact
PC, which stores its own copy of the
system configuration.
Operator panels are fully integrated
units, containing the touch screen
components and all position control
electronics. All position peripherals,
(headsets, footswitches, speakers
etc), connect directly to the OP.

The major system components are
therefore Operator Panels, (OPs),
Line Interface Modules, (LIMs), and
an Administrative PC.

OPs and LIMs are interconnected only
by dual redundant 100Mhz Ethernet
networks.

All communications within the system
are between OPs, and from OPs to
LIMs, via these dual networks.

In an unrealistic and
extreme
situation
of
multiple
failures,
providing at least one of the
networks survives, remaining OPs
and
LIMs
will
continue
to
communicate and be unaffected by
failed units.

All common main and backup power
supply
arrangements
can
be
accommodated within the VCS9808,
including
the
most
common
arrangement of primary mains supply
and secondary low voltage DC
supply.

OPs can be VESA mounted to an
arm, or special versions can be
supplied for mounting into a console
aperture or pod.

There are three types of Operator
panel available:
VCS9808-03
12.1” unit with integral alerts speaker
and
separate
3
socket
headset
connection unit
VCS9808-01
8.4” unit with integral speaker and two
integrated sockets for connection of
headsets.
VCS9808-EVCS
8.4”
unit
with
integral
speaker,
permanently
connected
telephone
handset with integral PTT, and a single
integral headset socket for connection of
headset. This unit can also be provided
with a permanently connected hand
microphone with integral PTT, instead of
the handset.

All OPs have a physical front panel
control for screen brightness.

01 and EVCS OPs also have a
physical front panel volume control
for the speaker, as well as on-screen
slider control.

All OPs can also drive an external
speaker unit if required, in addition
to, or as well as, the internal
speaker. The 03 can drive two
Page | 5
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external speakers that are separately
configured.

OPs provide a 600Ω transformer
coupled position record output. Its
level is adjustable from the OP via
password
protected
engineering
pages.


purposes, including accepting some
types of master time source.

OPs may optionally connect to a
footswitch for PTT functions.
LIMs are mounted in pairs into a 19”
rack using special 1U cages, together
with dual network switches, power
distribution
panels
and,
where
required, a 2U Power Base DC
backup supply unit.

OPs provide configurable dry contact
relay outputs for alarm and other
applications.
Rack installations normally include
IDF arrangements, normally via
Krone terminals.

One or two administrative PCs can be
connected to the system. If two are
present then can be configured as
either
Master
or
Slave.

Headsets, Telephone Handsets and
Microphones provided all have PTT
switches.

LIMs for analogue connection to radio
equipment and telephone interfaces
are individually cased modules, with
two separate channels.
Analogue
LIMs can be provided with two radio
channels,
with
two
telephone
channels, or with one radio and one
telephone channel.

All LIMs are connected to the system
via the dual Ethernet network.

Analogue
LIMs
provide
several
options for connection of radios and
telephone lines, with traditional 4wire E&M and all the common
signalling options.

Analogue LIMs provide two separate
600Ω transformer coupled line record
outputs, one for each channel. Their
level is adjustable from any OP via
protected engineering pages.

LIMs also have configurable dry
contact relay outputs for alarm and
other applications.

LIMs have an auxiliary Ethernet
connection.
This
is
used
for
connection
of
the
system
Administrative PC and for special
communication arrangements with
other systems.

LIMs also have serial ports available,
which can be used for special
Page | 6
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2.3
Types of Operator Panel
The VCS 9808–03
A 12.1” touch screen with front panel control
for screen brightness, and separate audio
interface with three configurable audio
sockets
for
headsets,
handsets
and
microphones. The sockets are identical in
hardware terms but software can allocate
different functions to them. A footswitch and
one or two speaker panels may also be
connected.
VCS9808-01
Figure 1.3
VCS9808-03 Panel
Figure 1.4
VCS9808-01 Panel
8.4” touch screen, with two integral and
configurable audio sockets for headsets,
handsets and microphones, and integral
loudspeaker.
Controls for volume and
screen brightness are provided on the front
panel and a footswitch and an external
loudspeaker may optionally be connected to
the unit. This cost effective panel offers all
the normal VCS facilities in a smaller unit.
The VCS9808–EVCS
Special version of the VCS 9808-01,
designed as an emergency panel. It offers
an 8.4” touch screen, a single integral audio
interface socket and loudspeaker.
It also
has an integral telephone handset. Controls
for volume and screen brightness are
provided on the front panel and a footswitch
may optionally be connected to the unit.
The attached telephone handset can be
replaced with a microphone, and custom
front panels can be provided.
An EVCS panel normally offers relatively
simple access to limited numbers of radios
and telephones, but can be provided with
some standard VCS functions.
Figure 1.5
VCS9808-EVCS Panel
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2.4
Summary of Main User Features
This section does not set out to be a complete guide to all the available user features, and the
exact set of features delivered with a system is adjusted to meet specific requirements. However,
the main features are identified here:
2.4.1 Radio Functions:

Individual selection of Main or Standby
Receiver or Transmitter from any OP,
with clear indication at all positions of
current selection.

OFF, MONITOR and TRAFFIC modes for
each frequency, selected by repeated
touches of the radio key, and with clear
indication of current selection.

Instant indication at all positions of a
failed main or standby receiver or
transmitter.

User audio routing selection for each
frequency, separately for Monitor and
Traffic modes. Audio may be routed to
Headset, Speaker or Both, and a clear
indication of the current selection is
provided.




User Radio key assignment. Radio keys
are visible to the operator in groups of 5
to 8 keys. A selector key gives access
to additional radio key groups for larger
systems. The user can assign particular
radios to particular and individual keys,
allowing customisation by users for
different sectors or roles.
Cross couple groups are pre-configured
at the Administrative PC. The user can
preset a series of permitted couplings,
together with the type of couple, half or
full duplex, and the positions allowed to
use each coupling.
At each operator position the radios
available for coupling depend upon
permissions set at the APC.
Cross
couple status is clearly indicated at the
coupling position, and shown as ‘coupled
elsewhere’ at other positions.
Instant replay of recent radio messages
is provided for each position.
(See
below)
2.4.2 Telephone Functions:

The HOME page contains an area with
assignable keys for telephone, intercom
and pre-set short code, or speed dial
keys. These keys can be assigned on a
position by position basis to reflect
requirements for the sector or role of
that position.

Preset Short Code, or Speed Dials can
be created, edited or deleted at the APC
by the user, and these then appear at
positions on ‘Speed Dial’ pages. Any of
these keys can then be assigned at each
position to keys on the top-level HOME
page.

The telephone pages at all positions
contain keys for all available telephone
lines of all types, including intercom to
other positions. Any of these keys can
then be assigned at each position to
keys on the top-level HOME page.

Intercom facilities of both the normal
and immediate, (hotline), type are
provided for communication between
positions.
These are implemented
directly via the network, and do not
require additional Line Interfaces.

Manual
Dialling
facilities,
(Indirect
Access),
are provided, and when
accessed via an exchange key the line is
selected from a preset hunt group. Hunt
groups are editable at the APC.

Standard functions for Conference, Hold,
Transfer, Priority and Re-Dial are
provided.

A Call Queue and Current Call key
display call status at all times.

Instant replay of recent telephone calls
is provided for each position.
(See
below)
2.4.3 Position Configuration
Keys
These include:

Screen Lock. Disables touch function to
allow cleaning of screen.

Speaker Selection Keys

Current live microphone selection key
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
Volume Key. Instant access to controls
for Radio and Telephone levels
2.4.4 Emergency Services Page

This page is accessed from the Home
page via an Emergency Key, thus
providing a degree of security against
accidental activation of calls.

The Emergency page has keys to which
emergency telephone lines may be
assigned, and a group call ‘CRASH’ key
can place simultaneous calls.

Provision exists at the APC to upload a
bitmap to the emergency page. This
bitmap
may
contain
emergency
procedures, in any language, or other
desired information produced by the
customer.
2.4.5 Playback
This feature allows the operator to instantly replay recent radio messages and telephone calls for
approximately the last 45 minutes of operation. The available features can be seen below, shown
on a VCS9808-03 12.1” panel. During replay the clock shows the actual time and date when the
recording was made.
This feature is completely separate from position recording. A separate output is available from
the panel for connection to multi-track recorder facilities.
Figure 1.6
Short Term Position Playback Facility
2.4.6 Other Features
These are accessed via the SETUP key, and can be divided into those available directly to the
operator and those requiring a security password for access.
Access arrangements are
configurable for individual customers. The division here is a typical one:
Password Protected Features
Open Features

System Status display

Position Hardware Test Tools

Assignment of Line Interface Modules
and Ops

Individual audio level adjustments for
all sockets and peripherals

Line Interface Module adjustment
and test

Adjustment of tone levels

Configuration of key clicks and alert
tones

Adjustment of screen parameters,
brightness, contrast etc.
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3
System Architecture
3.1


Architecture Description
The latest systems have a fully
distributed architecture that ensures
absolutely no single point of failure.
A key aspect of this architecture is
that each Operator Panel and each
Line Interface Module contains a
small but powerful sub-compact
computer with a high temperature
processor and very low power
consumption. No fans are required
for the OP, which is silent in
operation.
There is no central processing unit in
this system.
Each node, (line
interface or operator panel), stores a
complete copy of the system
configuration, and each node is
connected separately and directly to
the dual redundant Ethernet network.
Nodes communicate with each other
directly via the dual redundant
networks.

If any node fails then that fact is
immediately reported to, and visible
at every operator position that has
communication facilities with that
node.

Failure of any node has no effect on
the remainder of the system, which
continues to work normally. Indeed,
in the almost inconceivable situation
of multiple node failures the last two
surviving nodes will remain in
communication.

The Administrative PC, (mentioned
previously and described in detail
later), is not involved in system
communications, and in its absence
the system continues to work
normally.

The
absence
of
any
central
processing unit for communications,
and distribution of system control to
all nodes, dramatically enhances
reliability and considerably simplifies
installation and commissioning.

The Technical Manual provided with
each system is specifically written for
that system, and contains extremely
detailed
installation
and
commissioning information.
This
information,
and
the
simple
architecture, has allowed customers
for four of six recent systems of this
type to self-install the system,
without training in the UK and
without Troy site visits. Troy prefers
to
attend
sites
for
final
commissioning and site testing, but it
is not a pre-requisite.

The system combines use of dual
redundant power supply facilities
with dual redundant networks and
fully distributed control to provide a
system
that
has
outstanding
resilience and reliability.
Figure 1.7 Typical System
Arrangements
Page | 10
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3.2
Additional Architecture Detail
3.2.1 Position and Line Recording
Line Interface Modules provide a separate 600Ω analogue recording output for each channel, to be
connected to site multi track recording facilities, thus allowing recording of individual
radiofrequencies or telephone lines.
For position recording each OP has an RJ45 record output socket from which a Cat5e cable
connection can be made to the central recorder. It is optionally possible to avoid the need for
such additional cables from positions to the sound recorder.
3.2.2 Multi Channel Recorder Output unit
This is installed in the vicinity of recording equipment. It is connected to the standard Troy dual
network, and recovers audio on a position by position basis from the network. A separate audio
output for each position is provided for connection to the recording equipment.
Provision of a Multi-Channel Recorder Output Unit as an alternative to direct position cabling is an
option, and cost depends upon the actual requirements
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4
System Hardware
4.1
Administrative PC

The APC is used to display system
status, to perform continuous BITE
testing and reporting, to alert if a fault
occurs, and to allow such system
reconfiguration as permitted within
regulatory approval.

The
APC
has
no
role
in
the
communications process and no action
at the Administrative PC can prevent
normal communications.

The APC is LAN connected to an auxiliary
port on any one Line Interface Module.

Where there is no Master Time Source
available at an installation site, and
none has been requested from Troy, the
APC can be intructed to act as the time
source for log files and for display at
Operator Panels.
 The APC can be set to Slave or
Master Mode. In Slave mode system
monitoring is carried out continuously,
but configuration changes cannot be
made. A password is required to select
Master mode, and recoonfiguration is
then possible.
4.2

In Master Mode system reconfiguration
from the APC typically includes changes
to radio key identifications, telephone
key
and
hunt
group
changes,
configuration
of
speed
dials,
configuration of cross couple groups and
uploads of bit maps to emergency
pages.

If required for redundancy purposes two
APCs can be used, and either can be
selected as Master or Slave. Again, the
Master is fully functional and the Slave
simply monitors the system. Where the
APC is acting as the time source then
just one can be nominated to this task.

Various options are provided for viewing
and exporting system log files, which
provide a detailed record of all system
activity. Alternatively the VCS9808 can
export system information to third party
systems using agreed protocols.

It should be noted that whole system
status can also be viewed from any
operator panel, via security protected
engineering pages.
Line Interfaces
4.2.1 Introduction
The range of line interfaces available for the Troy VCS9808 is constantly being updated to include
the latest requirements. Broadly speaking line interfaces can be divided into Analogue and Digital
types.
Analogue interfaces include 4-wire E&M, 4-wire telephone and 2-wire telephone interfaces.
Telephone interfaces are able to connect to various types of exchange lines and telephone
equipment, including Local Battery, (LB), Battery Local Sound System, (BLSS), FXS direct
telephone lines, FXO exchange lines and MFC lines with tone signalling.
Digital interfaces currently available or shortly to be released include ISDN, VoIP and IP radio
connection.
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4.2.2 Line Interface Module
Physical Arrangements
4.2.3 Line Interface Module
Mounting
A pair of modules may be mounted side-byside in a 19” wide 1U rack mount cage, and
as many of the 1U cages as are required may
be fitted into a 19” rack.
Figure 1.8
Dual Channel Line Interface
Module
Each module is contained in a small metal
enclosure which is just under 1U high, 300
mm deep and 200 mm wide.
The photographs below show the general
arrangement of modules in a rack cage. In
this example 6 modules are shown installed
in a 3U high cage assembly.
Figure 1.9
Front view of 3U cage fitted with
6 line interface modules
The general format for all line interfaces is
similar to the one shown above. Each
module has dual network connections, mains
power input, low voltage DC input, record
output, serial ports, dry contact relay outputs
and an auxiliary Ethernet port, which is used
in a variety of ways.
Analogue Line Interface Modules have two
distinct channels. These can be two radio
channels, two telephone channels or one
channel of each type. Separate connectors
on the rear of the module provide
connectivity for each channel, usually via IDF
arrangements.
Digital Interface Modules are provided in
a physically similar form to the analogue
interfaces above, but then exact channel
arrangements depend upon the requirement.
Figure 1.10 Rear view of 3U cage with 6 line
interface modules
Figure 1.11 Rear view of a dual line interface
module
Page | 13
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VCS9808 Live System Information
www.troy.co.uk 0208997904
4.2.4 Typical Cabinet Installation
Line Module cages are housed in a 19” rack, normally located in the Equipment Room, and the
installation kit includes power distribution, dual network switches, cabling and cable management.
Figure 1.12 Line Module Cage installation
This figure shows a factory test installation, without the Line Modules fitted. It does not include
the Power Base DC Backup unit.
Cabinets can be supplied pre assembled and wired, or as an installation kit.
customers may use space in existing cabinets to install the Troy components.
Alternatively
Troy offer training courses at its UK headquarters covering all aspects of installation and
commissioning. Alternatively, Troy can carry out the installation and commissioning, and provide
on-site training for maintenance engineers and for users.
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Copyright © Troy Systems Ltd 2013
VCS9808 Live System Information
www.troy.co.uk 0208997904
4.3 Power Supply Arrangements
4.3.1 General Arrangements
The VCS9808 is designed to accommodate all
possible
power
supply
arrangements.
Systems can be supplied to accommodate
the
following
power
arrangements
Single Mains supplies that are backed by UPS
and generator facilities

Low voltage DC supplies in the range
18 to 72v DC

Primary Mains Supply with
voltage 18 to 72v DC backup

Dual low voltage DC supplies

Dual Mains supplies
The specific
below.
arrangements
are
low
detailed
4.3.2 Operator Panel Supplies
Operator panels have dual redundant power supply sockets that each accept 12v DC. In mainsonly systems they are supplied by two desktop mains power supplies with 12v DC outputs.
An alternative desktop power supply can be provided that accepts 18 to 72v DC and provides 12v
DC output. The panel can be supplied from two such units for dual DC supplies, or one of each
type of desktop supply for Mains/DC systems.
4.3.3 Network Switch Supplies
Where required, the supplied network switches have dual redundant power supply sockets that
each accepts 12v DC. In mains-only systems they are supplied by two desktop mains power
supplies with 12v DC outputs.
The alternative desktop power supply mentioned above can be provided, accepts 18 to 72v DC and
provides 12v DC output. The network switches can be supplied from two such units for dual DC
supplies, or one of each type of desktop supply for Mains/DC systems.
4.3.4 Line Interface Supplies



Line Interface Modules accept mains
supply via a single IEC socket. They
also have a low voltage DC input that
accepts 5.3v DC.
Where required, systems are supplied
with a 2U rack mounting Power Base
unit. In its standard form it accepts 18
to 72v DC and provides a maximum of
twelve or a minimum of two 5.3v DC
outputs for Line interfaces.
Internally the Power Base is modular,
and each pair of 5.3v DC outputs is
supplied from one plug-in module. The
Power Base can accept up to six
modules. In the interests of economy
the number of modules fitted to it is
determined by system size.

For systems requiring more than twelve
low voltage line interface supplies
additional
Power
Base
units
are
provided.

An alternative version of the Power Base
can be provided that accepts mains
power.
This allows the system to
operate with independent dual mains
supplies.

Systems with dual DC supplies use
two Power Base units and a variant of
line interface modules.
Page | 15
Copyright © Troy Systems Ltd 2013
VCS9808 Live System Information
www.troy.co.uk 0208997904
5
Operator Workstation Peripheral Equipment
5.1 External Loudspeaker
unit
The unit shown here is intended for
panel mounting. It connects locally
to the operator panel and has a
physical volume control on the front
panel. When Speaker Alerts are
selected at the operator panel the
front panel LED is illuminated.
Other configurations of the LED are
possible.
Figure 1.13 Panel Mounting
External Speaker Unit
Figure 1.14 Audio Interface for VCS9808-03 Panel
5.3 Footswitch
The Standard footswitch unit is shown here. It is large
and heavy duty, and incorporates a heavy and non-slip
base. The footswitch can be provided at a lower cost
by eliminating the non-slip base. In this form it is the
Basic footswitch.
Figure 1.15 Standard Non-Slip Footswitch
5.2 Audio Interface
Only used with the VCS9808-03
12.1” OP. Other OPs have integral
audio sockets. The three sockets
may be configured separately for
different uses, e.g. Mentor.
Sockets
can accept headsets,
telephone
handsets
and
microphones, with or without PTT
switches.
If a footswitch is present at a
position equipped with this interface
then the footswitch connects to this
interface and the interface connects
to the OP via three standard Cat5e
cables.
The system is configured to
recognise the different types of
transducers, and adjusts gain
accordingly.
Individual
level
adjustments for each socket are
provided at operator positions.
5.4 Headsets
The standard headset supplied for the VCS9808 is a
special version of the Airlite 100 ATC unit. It features
high quality ears and noise cancelling microphone.
It is normally supplied with an in-line PTT switch but
can be supplied without it. The connector is a LEMO
2B 8 pin type.
This headset can also be siupplied in a single-ear
monaural format.
Figure 1.16 Standard Binaural Headset with PTT
Page | 16
Copyright © Troy Systems Ltd 2013
VCS9808 Live System Information
www.troy.co.uk 0208997904
5.5 Telephone Handset
5.6 Desk Microphone
This is a high quality unit designed
for continuous use in control room
environments.
It features a
sophisticated
noise
cancelling
microphone, sensitive earpiece and
optional fitted PTT switch.
The
connector is again a LEMO 2B 8 Pin
type.
This unit features a high quality noise cancelling
microphone and PTT switch fitted into the base. The
base is heavy duty and stable.
Figure 1.17 Standard Telephone
Handset with PTT
6
Hand held microphones can also be supplied with our
systems.
Figure 1.18 Standard Telephone Handset with PTT
Further Information
Please visit our website at www.troy.co.uk for further information.
Troy will be pleased to discuss your requirements with you, and to assist in determining your
requirement specification. Please contact us by email [email protected] or by Skype at troysystems.
Alternatively call us on +44 (0)208 799 7200.
Troy will also be pleased to provide a budgetary quotation against an outline specification or a
fixed price quotation against a detailed specification.
Page | 17
Copyright © Troy Systems Ltd 2013
VCS9808 Live System Information
www.troy.co.uk 0208997904