The ETELM Company is located in the technological area of Courtaboeuf (PARIS), and specializes in

private radio communication infrastructure systems.

With dynamic and perennial teams, the strategy of ETELM is now oriented towards the manufacturing

and installation of TETRA radio networks.

This change is based on an accurate knowledge of the PMR market acquired over the last 28 years.

ETELM offers complete mastery of its expertise for design, development, manufacture, integration

and testing, sales and deployment of systems.

The possibilities of the standard combined with an extremely flexible architecture allow innumerable

configurations which make TETRA available to all budgets, without any limits to future evolutions.

ETELM has ISO 9001 V2000 certification and has significant technical resources, both for

development and the manufacture and testing of units (software development platforms, equipment

measurement benches, CEM authorisations, etc).

All of ETELM’s equipment is integrally designed, industrialized and sold with a constant concern for

creating modular and evolutive architecture without revising the existing architecture.

Their performance and reliability have been tested by various categories of users.

ETELM has signed the TETRA MoU charter, by which it undertakes to promote and respect the

standard without introducing any specific components into the standard equipment( components which

are specific to a network are put into independent PCs connected to the network).

A FORCE FOR DEVELOPMENT A FORCE FOR DEVELOPMENT A FORCE FOR DEVELOPMENT A FORCE FOR DEVELOPMENT

AT THE SERVICE OF RADIOAT THE SERVICE OF RADIOAT THE SERVICE OF RADIOAT THE SERVICE OF RADIO COMMUNICATION

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DECENTRALIZED ARCHITECTURE

ETELM has selected a decentralized architecture, which is organized as follow:

A complete network consist of sub-networks connected to each other; each sub-

network is made up of base station (BS) connected in a star around a switch (SW),

the switch itself being connected to peripheral equipment (Dispatching, voice and

data, PABX, Administration console…) – thus, a sub-network is autonomous, and it

may cover a whole town or region with several radio sites. Each sub-network has it

own data bases and its own supervision.

STRUCTURAL CHOICES

The evolution from analogic technology to

digital technology (TETRA) in the years 2000 in

the sector of professional radio communication

has modified a well established industrial order.

By preparing itself since 1995 for this change

with the acquisition of the mastery of a

complex technology, ETELM became the

referenced supplier, particularly in the world of

transport, Utilities, Oil&Gas and public safety.

This sudden growth has been controlled, and is

continuing with international contracts all over

the world.

MEETING SUCMEETING SUCMEETING SUCMEETING SUCCCCCESSESSESSESS

ETELM ETELM ETELM ETELM TECHNOLOGY PHYLOSOPHYTECHNOLOGY PHYLOSOPHYTECHNOLOGY PHYLOSOPHYTECHNOLOGY PHYLOSOPHY

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STRUCTURAL CHOICES

ETELM has working methods which are based upon the respect of initial choices, in particular:

The systematic use of European standard

The systematic use of standard interfaces

The systematic use of Commercial On The Shelf products (PC under Windows)

Free distribution of the interface protocol with external IP applications

INTEROPERABILITY

ETELM takes care to offer to its customers the characteristics if interoperability with terminals

suitable for making installations perennial with:

Technical, commercial and financial independence from terminals manufacturers

A guarantee that there are many procurement sources

A guarantee of interoperability with laboratory and fields tests

A guarantee to be able to receive several brands of terminals on the same network

The fixed links used in the networks play a major role, in particular for operating cost.

ETELM offers a set of technical solutions which can provide the greatest flexibility on this

matter.

Thus, each link between the switch and a radio site can be programmed with a G703, V11,

or IP interface without modifying the equipment.

In the G703 version, the equipment includes multiplexers of the ‘drop and insert’ type,

programmable from all the types of architectures required.

The links to central application equipment (audio dispatching, data dispatching,

message systems, recording…) are all of the IP type.

The voice on IP technology used allows all the communications to be processed

systematically in conference mode (a group of operating posts forming a dispatching

centre).

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MIXED ARCHITECTURE OR FULL IPMIXED ARCHITECTURE OR FULL IPMIXED ARCHITECTURE OR FULL IPMIXED ARCHITECTURE OR FULL IP

NETWORKNETWORKNETWORKNETWORK

City TETRA Radio Network 1

City TETRA Radio Network 2

Small City TETRA network 5

Small City TETRA network 4

Small City TETRA network 3

WAN

The supply of equipment is a homogeneous and compatible family; each units is modular and each

extension is made either by the addition of new equipment or by the addition of boards which can

be slotted directly into the existing equipment.The number of sub assemblies is reduced to the

minimum.

(Re-use of the same modules in various of equipment). These dispositions alone guarantee simple

evolution to the most detailed requirements.

A HOMOGENEOUS A HOMOGENEOUS A HOMOGENEOUS A HOMOGENEOUS

RANGE OF EQUIPEMENTRANGE OF EQUIPEMENTRANGE OF EQUIPEMENTRANGE OF EQUIPEMENT

WAN IP

NMT PABX/PSTN GatewayAVL consoleDispatcher

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INFRASTRUCTUINFRASTRUCTUINFRASTRUCTUINFRASTRUCTURERERERE EQUIPMENT EQUIPMENT EQUIPMENT EQUIPMENT

ACCESSORIESACCESSORIESACCESSORIESACCESSORIES

AUTOMATIC SINGLE SITE SINGLE CARRIER RELAY (TBSG)

A radio infrastructure unit that is fully compatible with the TETRA standard whose mode

of operation is identical to that of the automatic relays which are widespread in analogic

technology.

BASE STATION (TBS20)

The TBS11 single carrier base station works equally well with dedicated links and IP. It

is equipped with a local and remote extension junction to other aquipment.

The TBS11 is fully compatible with TRA2M (automatic relay) and TBS10 (previous version

of the base station).

SWITCH (TSW10)

The TSW10 unit is the nodal centre of the TETRA network. It is in charge of the

management and interfacing of the base stations, the dispatching network and the

telephone equipment. Each switch takes charge of up to 32 base stations, whatever the

distribution of these stations over the various radio sites. It is the nerve centre of the

network, and it can be fully backed up by automatic switching in use, which is particularly

useful for software and hardware breakdowns.

ADMINISTRATION CONSOLE (TSC10)

The console of administration is the point of access to the network for:

Calibrating the network

Managing the subscribers

Real time maintenance

Historic

FIBER OPTIC REPEATER AND HERTZIEN REPEATER (TOR/TAR)

The basic or secured fibre optic repeater enables to extension of radio cover to

confined surroundings such as tunnels, industrial building and underground premises.

The hertzian repeater enables one off zones of shadow to be dealt with. Both units

may be combined for special applications.

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BASIC SERVICES SUPPLEMENTARY SERVICES

DATA SERVICES SUPERVISION FUNCTIONS

(Network Management Terminal)

SUPPLIED FSUPPLIED FSUPPLIED FSUPPLIED FEATURESEATURESEATURESEATURES

Registration

Selective Calls

Direct or off-hook

Group Calls (normal, acknowledge, broadcast…)

Half Duplex Management with priority

End of Communications

Trunk or Quasi trunk Mode

Open Channel Calls

Roaming, Hand Over

List search call

Include call

Call forwarding unconditional

Call forwarding on busy, on no reply or on nor reachable

Call authorized by dispatcher

Barring of incoming calls

Barring of outgoing calls

Call report

Calling party identification

Call completion on no reply or on busy subscriber

Short number addressing

Priority call

Preemptive call

Discreet listening

Ambiance listening

Talking party identification

Area selection

Late entry

Dynamic group identification

Call retention

Circuit mode

Status

SDS Type 1.2.3.4

IP packet mode (TCP/IP+UDP)

Real time synoptic display on the network

Monitoring of an element of the network by ‘zoom’

Alarms management

Parameters access of all elements of the network

Automatic loading of the parameters of different elements of

the network

(specially

basic

Create / delete / recopy of mobiles

Declaration of the rights affected to each mobiles

Create / delete / recopy of groups of mobiles

Rights and access for each group declaration

Operating parameters mode declaration

Authorized visitors declarations

Numbering plan description

MOBILES MANAGEMENT FUNCTIONS (Network Management Terminal)

VARIOUS

Group call from a telephone

Real time monitoring of the network

Automatic remote loading of the equipment of the site

Security of the links integrated in the equipment

Technical and administrative configurations declared in standard

files PC form 6

APPLICATIONSAPPLICATIONSAPPLICATIONSAPPLICATIONS

Etelm makes every effort transmission systems which are very open so that they can receive

varied applications; with this in mind, the transmission system has to be transparent between

a standard on board interface (PEI junction) and a centralized interface that is a current

and open as possible. Thus, the use of the network for an application does not require any

licences. The specifications of the centralized interface are publicly distributed, and they

enable computer developments without any particular knowledge of the TETRA technology.

Open protocol

A hub independent of applications

SOME APPLICATIONS ARE AVAILABLE IN STANDARD:

Basic audio and SDS dispatching

Dispatching oriented towards the management of urban transport

IP recorder of communications

Server for service allocation

Server for GPS positions

Unit for management of remote PCs

PO

Enr.

SIV

SAE

INT

Standard Interface

Standard Air

Interface

IP SOFTWARE APPLICATION

Audio Applications

DATA Server

External System

Interface

TERMINALS And

OPERATING SYSTEMS

Non specific Software application compliant to

standard

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PERENNITY AT THE SERVICE OF THE PERENNITY AT THE SERVICE OF THE PERENNITY AT THE SERVICE OF THE PERENNITY AT THE SERVICE OF THE

CUSTOMERSCUSTOMERSCUSTOMERSCUSTOMERS

ETELM offers one of the most experienced Research & Development team in the field

of professional mobile radio communication ; its experience, its structure and its

strong financial independence enable it to offer the best guarantees of perennity, in

particular:

On the technical side, ETELM prefers to use existing standards, which

guarantee the compatibility of the equipments.

On the industrial side, ETELM has ISO 9001 V2000 certification.

On the sales side, ETELM is one of the rare structures which provide

hardware.

On the financial side, ETELM is based on solid foundations, and its

experiencing sustained growth.

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