EMS HSD series User Manual

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HSD

Aeronautical Transceivers

User's Guide

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HSD AERONAUTICAL TRANSCEIVERS

The information in this document is subject to change without notice, and should not be construed as a commitment by EMS Technologies, who reserve the right to make improvements to the product described

in this User’s Guide at any time and without notice.

No part of this document may be reproduced, transcribed, copied, or

translated by any means without the prior written consent of EMS

Technologies Canada.

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Microsoft, Windows, Windows 98 are registered trademarks or trademarks of Microsoft Corporation. Other product and company names herein may be the trademarks of their respective owners.

Revision Sections

revised

Release

Date

Comments

A All 22/03/02 Initial Release B All 2/08/02

Release of combined product document, addition of bonded calls, low-speed voice calls, revision of initial release

HSD Aeronautical Transceivers User's Guide Document No. EMS-MN-1110-10048 Revision B © EMS Technologies Canada August 2, 2002

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used for any purpose other than the purpose for which it was issued, nor is it to be copied or communicated in whole or in part, to

any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

User’s Guide EMS-MN-1110-10048

Contents

Preface .......................................................................v

1 Introduction ........................................................1

Introducing HSD aeronautical transceivers ..........................2

Services and features .............................................. 2

Installation modes .................................................. 3

About Inmarsat .................................................................7

Inmarsat Swift64 services ........................................ 8

Land Earth Stations (LES) ........................................ 9

Mobile Earth Stations (MES) ..................................... 9

About ISDN.....................................................................11

Accessing the Internet using ISDN........................... 11

ISDN components ................................................. 12

2 Getting started ..................................................15

Registering your HSD transceiver .....................................16

Activating service.................................................. 17

Operating considerations .................................................19

Satellite transitions ............................................... 19

Satellite communications ....................................... 19

Setting up .......................................................................20

ISDN data call requirements................................... 21

Bonded calls (two-channel systems only) ................. 21

Powering up HSD transceivers ................................ 22

System readiness.................................................. 22

User interfaces ..................................................... 23

Configuring a terminal adapter................................ 26

Creating new dial-up networking connections....................32

3 Getting connected .............................................47

Connecting to the Internet ...............................................48

Connecting to an intranet ................................................50

Making a terminal to terminal connection..........................52

Accessing remote files ........................................... 52

4 Placing voice calls .............................................55

Voice calling overview......................................................56

Dialing sequence explanation.................................. 57

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HSD Aeronautical Transceivers

Getting assistance................................................. 57

Placing air-to-ground voice calls ....................................... 58

Calling to North America ........................................ 58

Calling outside of North America ............................. 59

Placing voice calls from ground-to-air ............................... 60

Using Auto Attendant ............................................ 60

5 Sending and receiving fax .................................65

Introduction to sending and receiving fax .........................66

Sending air-to-ground faxes .............................................66

Sending ground-to-air faxes .............................................69

Using Auto Attendant ............................................ 69

Using TELENOR Network 1—for fax calls................... 71

6 Troubleshooting ................................................73

Troubleshooting calls ....................................................... 74

Verifying the log-on status HSD transceivers............. 76

Checking connections ............................................ 77

Resetting the system............................................. 77

Optimizing your system ......................................... 78

Repair and product support .................................... 79

7 Annex ................................................................81

Acronyms and abbreviations ............................................82

Glossary..........................................................................83

Inmarsat satellite-beam coverage map .............................84

Recommended devices ....................................................85

Index........................................................................87

Customer feedback ..................................................93

Customer comment form .........................................94

Important numbers..................................................95

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User’s Guide EMS-MN-1110-10048

iii

List of Figures

Figure 1 HSD aeronautical transceiver .....................................................v

Figure 2 Satellite communication network .............................................10

Figure 3 System set-up options: terminal adapter...................................24

Figure 4 System set-up options: router ...................................................24

List of Tables

Table 1 HSD transceiver default settings................................................18

Table 2 ISDN default MSN settings .......................................................27

Table 3 Satellite Ocean Region codes.....................................................63

Table 4 Satellite Ocean Region codes.....................................................72

Table 5 System log-on status tones.........................................................76

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HSD Aeronautical Transceivers

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any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

User’s Guide EMS-MN-1110-10048

Preface

This User’s Guide provides an overview of Inmarsat services and operating instructions for EMS Technologies High-Speed Data (HSD) Aeronautical Transceivers.

Although the HSD transceivers support a variety of user interfaces and configuration options, the purpose of this document is to provide an example of a basic system set-up only. Consult with your corporate Information Services personnel to customize the system to meet your specific system and user needs.

This document uses Microsoft® Windows 98® as the example operating system for illustrating the set-up and configuration process of dial-up connections. However, performance results vary between operating systems.

At the time of printing, Windows 2000® is the best performer of Microsoft operating systems for satellite network communications using HSD transceivers.

Figure 1 HSD aeronautical transceiver

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HSD Aeronautical Transceivers

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any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

User’s Guide EMS-MN-1110-10048

1 Introduction

   

HSD aeronautical transceivers Inmarsat ISDN services Satellite communications

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any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

HSD Aeronautical Transceivers

Introducing HSD aeronautical transceivers

HSD aeronautical transceivers provide a digital connection, between aircraft and ground communication networks, using the Inmarsat Satellite Communications system and the international public telephone network.

HSD products support EIA/TIA-232, ISDN, and Ethernet connectivity between an aircraft and selected Land Earth Stations, using the Inmarsat Satellite Communications system and the international Public Switched Telephone Network (PSTN).

The HSD transceivers act as a Mobile Earth Station (MES)—sending and receiving voice, fax, video, and data over satellite links.

Services and features

HSD transceivers’ services and features vary depending on the model and installation configuration-mode. The following section provides descriptions of all HSD models and configuration-modes documented in this User’s Guide.

HSD transceivers are available in models that are installed as stand-alone systems or integrated into existing SATCOM systems.

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User’s Guide EMS-MN-1110-10048

Installation modes

STAND-ALONE mode

HSD transceivers in Stand-Alone mode provide one or two channels of Swift64 data service. The HSD transceiver controls both the antenna and the High Power Amplifier (HPA).

Features:

• Operation with any Inmarsat approved Aero-H antenna

• Antenna and HPA are controlled by the HSD system

• Stand-Alone with ARINC 741 SATCOM

Supported services:

• Bi-directional data throughput for sending and receiving e-mail, surfing the Web, video conferencing, and connecting to internal intranets and Bulletin Board Systems (BBS)

• ISDN interface

• Voice and fax transmission (with terminal

adapter or ISDN Phone)

• Single channel (64 k) or dual channel (128 k)

• Ethernet and Mobile Packet Data (future

availability)

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used for any purpose other than the purpose for which it was issued, nor is it to be copied or communicated in whole or in part, to

any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

HSD Aeronautical Transceivers

SELECTIVE mode (Non-Stand-Alone mode)

In Selective mode, the HSD transceiver operates with an AERO H/H+ system. The HSD hardware is installed in the AERO H/H+ HPA equipment position.

Selective mode provides one or two channels of Swift64 data or AERO H/H+ calls.

If one or more Swift64 calls are in progress when an AERO H/H+ call is attempted, any incoming or outgoing Swift64 calls are preempted to allow the AERO H/H+ call to proceed.

If any AERO H/H+ calls are in progress, Swift64 calls are not allowed by the system.

To operate in Selective mode, version 3.45 or higher of the control software is required.

Features:

• Operation with any Inmarsat approved Aero-H High Gain antenna

• Integrates with ARINC 741 SATCOM

• Configures to operate as either a single or dual

channel system

Supported services:

• Bi-directional data throughput for sending and receiving e-mail, surfing the Web, video conferencing, and connecting to internal intranets and Bulletin Board Systems (BBS)

• ISDN interface

• Voice communication through the existing Aero-

H/H+ SATCOM System

• One or two channels of 64 kb/s channels Ethernet and Mobile Packet Data (future availability)

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User’s Guide EMS-MN-1110-10048

COMBINED mode:

At time of printing, systems do not operate in this mode. Software modifications are underway to enable this mode of operation.

In Combined mode, the HSD transceiver operates with an AERO H/H+ system. The HSD hardware is installed in the AERO H/H+ HPA equipment position.

This system configuration provides one channel of Swift64 data and allows AERO H/H+ calls. (Simultaneous Swift64 and AERO H/H+ calls can be placed at the same time providing there is sufficient HPA power available.)

If one or more Swift64 calls are in process and an AERO H/H+ call is attempted (either incoming or outgoing), the AERO H/H+ call is allowed to proceed if there is sufficient HPA power available to process all of the calls.

If any AERO H/H+ calls are in process, Swift64 calls are allowed—providing that there is sufficient HPA power available to process both the high-speed data and AERO H/H+ calls.

Features:

• Configures to operates as a single channel system only

Supported services:

• Bi-directional data throughput for sending and receiving e-mail, surfing the Web, video conferencing, and connecting to internal intranets and Bulletin Board Systems (BBS)

• ISDN interface

• Voice and fax transmission (with terminal

adapter or ISDN Phone)

• Swift 64 high-speed data service

• Ethernet and Mobile Packet Data (future

availability*)

* Available via an optional service bulletin

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This document contains information that is private and Confidential, and is supplied on the express condition that it is not to be

used for any purpose other than the purpose for which it was issued, nor is it to be copied or communicated in whole or in part, to

any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

HSD Aeronautical Transceivers

CO-OPERATIVE mode:

At time of printing, systems do not operate in this mode.

In Co-operative mode, the HSD transceiver operates with an AERO H/H+ system. The HSD hardware is installed in the AERO H/H+ HPA equipment position.

A communications link, between the AERO H/H+ system and the HSD system, coordinates the use of the HPA.

This mode provides one or two channels of Swift64 data and allows AERO H/H+ calls. (Swift64 and AERO H/H+ calls can be placed at the same time—providing there is sufficient HPA power available.)

If any AERO H/H+ calls are in process, Swift64 calls are allowed—providing that there is sufficient HPA power available to process both the high-speed data and AERO H/H+ calls.

Features:

• Configures to operate as either a single or dual channel system

Supported services:

• Bi-directional data throughput for sending and receiving e-mail, surfing the Web, video conferencing, and connecting to internal intranets and Bulletin Board Systems (BBS)

• ISDN interface

• Voice and fax transmission (with terminal

adapter or ISDN Phone)

• Swift 64 high-speed data service

• Ethernet and Mobile Packet Data (future

availability*)

* Available via an optional service bulletin

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used for any purpose other than the purpose for which it was issued, nor is it to be copied or communicated in whole or in part, to

any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

User’s Guide EMS-MN-1110-10048

About Inmarsat

Inmarsat (International Maritime Satellite Organization) is an international organization that operates and maintains the satellites and satellite networks. Inmarsat operates four strategically placed geostationary satellites. Each satellite is located over an oceanic region; the ocean regions are named as follows:

• Atlantic Ocean Region-East (AOR-E)

• Atlantic Ocean Region-West (AOR-W)

• Indian Ocean Region (IOR)

• Pacific Ocean Region (POR)

Inmarsat satellites provide worldwide telecommunication services for aviation, shipping, and land mobile terminal users. These satellites connect to ground telecommunication systems through Land Earth Stations (LES).

Inmarsat offers a range of satellite services and utilizes Inmarsat service providers to provide a range of multimedia and voice communications.

To find out more about Inmarsat visit their Web site at

www.inmarsat.com

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any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

HSD Aeronautical Transceivers

Inmarsat Swift64 services

Inmarsat’s Swift64 service supports high-speed ISDN communications and TCP-IP Internet connectivity. HSD Aeronautical Transceivers provide the connection between the aircraft and the Swift64 service.

Inmarsat Swift64 service supports the following:

• Toll-quality voice

• Four ISDN bearer Services (using Euro ISDN):

 64 kb/s UDI (supports ISDN to ISDN

connections)

 56 kb/s (supports connections to terminals in

switched 56 k networks)

 Speech (supports voice connections between

ISDN phones or analogue handsets connected to a Terminal Adapter)

 3.1 kHz audio (supports connections

between analogue devices commonly used over the PSTN):

ISDN Modems 



Group 3 fax machines

Secure communications

4.8 k low-speed voice

Inmarsat and Inmarsat service providers work together to provide these services anywhere within the coverage of the Inmarsat Swift64 satellite system. The coverage provided by Inmarsat’s Swift64 service is illustrated in the Annex of this User’s Guide.

For further information about Swift64 services, visit Inmarsat’s Web site: www.inmarsat.com/swift64

or contact

their Customer Care Service at:

Tel: +44 20 7728 1777 Fax: +44 20 7728 1142 E-mail: customer_care@inmarsat.com

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User’s Guide EMS-MN-1110-10048

Land Earth Stations (LES)

Inmarsat Service Providers (ISPs) operate Land Earth Stations (LES). The ISPs are typically public telephone companies of the country where the LES is located.

Using satellite communications antenna and up-anddownlink communications equipment, the LES converts the space segment to a format compatible with public and private telephone and data networks.

Each satellite is associated with a number of Land Earth Stations that fall within its coverage.

Mobile Earth Stations (MES)

The Mobile Earth Station (MES) provides ISDN service over the Satellite network similar to the ISDN services installed by telecommunications companies for land-based data communication.

The HSD Aeronautical Transceiver acts as a Mobile Earth Station providing the connection to the Inmarsat Swift64 service.

Figure 2 shows the basic connection between the MES, Satellite, LES, and land network connections.

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any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

HSD Aeronautical Transceivers

Land Earth Station

INMARSAT Satellite

International

Telecommunications

Network

MES -Aircraft equippe

HSD Aeronautical Tra

Terrestrial Link

d with

nsceiver

Air-Ground-Air

Communications

Space Segment

Figure 2 Satellite communication network

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User’s Guide EMS-MN-1110-10048

About ISDN

ISDN (Integrated Services Digital Network) is a digital telecommunications technology that provides Internet, voice, fax, video, and data services.

ISDN is digital, which allows for greater speed, flexibility (supports a broad range of applications), and reliability.

Accessing the Internet using ISDN

To access the Internet using ISDN service, the user needs to:

• Establish a connection to the Internet through Dial-up Networking using a terminal adapter or router to connect to the Internet Service Provider

• Run a Web browser to access Web sites

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any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

HSD Aeronautical Transceivers

ISDN components

The components required for ISDN service over the satellite network are listed below:

• Euro ISDN terminal adapter or router

• Euro ISDN line

• ISDN Service Provider account

• Computer

• Dial-up Networking capabilities

• Web browser

The three main components required for ISDN service (terminal adapters, ISDN lines, and ISDN protocols) are described in the following sections.

Although routers are also an interface option, only an example set-up using a terminal adapter is described in this User’s Guide.

Terminal adapters—ISDN devices

Terminal adapters are ISDN devices that function similarly to a modem.; they dial and answers calls, and receive and transmit data.

Use a Euro S/T ISDN model terminal adapter with the HSD Aeronautical Transceiver. Inmarsat Swift64 service and the HSD Aeronautical Transceivers do not support the North American ISDN variant.

ISDN protocols

Terminal adapters use ISDN protocols to format data between the ISDN line and the user’s computer.

HSD Transceivers support all ISDN protocols that run over a B channel on an ISDN line. These protocols are implemented and configured through the user’s operating system.

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any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

User’s Guide EMS-MN-1110-10048

Performance considerations of satellite ISDN

The transmission of data over satellite networks differs from land-based ISDN applications. Satellite communications experience factors such as transit delay and bit errors caused by signal fading and blockages.

ISDN protocols are designed specifically for ground-based ISDN networks. Performance of different ISDN protocols varies depending on the properties of each application.

Because of these challenges, it is sometimes necessary to optimize the system to achieve peak performance over the satellite network.

Optimizing ISDN protocols for satellite networks

ISDN protocols are not designed specifically for use over satellite communication networks. To improve data transfer rates most ISDN protocols require minor adjustments.

For best results, consider how the ISDN protocol you intend on using sends data over the network and adjust the configuration taking into account the unique operating environment of satellite network communication.

As examples, consider the ISDN protocols TCP/IP over PPP and V.120.

As a basic protocol, PPP is typically operated under the networking protocol TCP/IP. PPP has error checking properties but does not offer flow control. TCP/IP is flexible and designed to run over different networks including the Internet which like satellite networks experiences high transit delays. Used together, PPP and TCP/IP protocols perform well over the Inmarsat ISDN service.

The protocol V.120 includes error correction and flow control applications. Flow control limits or fixes the amount of data that can be in transit at any one time and waits for acknowledgment of receipt from the other end of the connection before sending more data.

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HSD Aeronautical Transceivers

The default parameters of V.120 limit the maximum transit size of the data package to approximately 1764 bytes causing poor performance results over satellite ISDN networks.

Improve the performance of V.120 over satellite ISDN by changing the default parameters. Increase the maximum size of data allowed in transit at one time to a value up to approximately 8000 bytes. (Some applications of V.120 permit the user to change the ‘window-size’ just for this purpose.)

When choosing an ISDN protocol for satellite ISDN networks consider a flexible solution that allows for modifications to the operating parameters to suit the unique environment of satellite ISDN.

System performance also depends on which operating system you are using. At the time of printing, Windows 2000 is recommended for optimal performance.

For more details, refer to the Troubleshooting section.

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User’s Guide EMS-MN-1110-10048

2 Getting started

    

Registering your HSD transceiver Activating service Operating considerations Setting up Creating new dial-up networking connections

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any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

HSD Aeronautical Transceivers

Registering your HSD transceiver

The HSD transceivers act as a Mobile Earth Station (MES) providing the connection to the Inmarsat Swift64 service.

Before operating an HSD transceiver, you must register with an Inmarsat service provider to activate an account and have Inmarsat Mobile Numbers assigned.

At the time of printing, TELENOR and Satcom Direct, Inc. are the only service providers offering this service. For more information, contact their Customer Activation Department at the following numbers:

Telenor

In North America: 1-800-685-7898

Outside North America: 1-301-214-3100

Fax: 1-301-214-7092

E-mail: activations@telenor-usa.com

customercare@telenor-usa.com

Satcom Direct Inc.

Telephone: 321-777-3000

Fax: 321-777-3702

E-mail: activations@satcomdirect.com

Download an electronic copy of the Mobile Earth Station registration form from Telenor’s Web site at www.telenor-

usa.com/Inmarsat_aero.pdf or from Satcom Direct Inc at www.satcomdirect.com.

For an up-to-date listing of service providers, contact INMARSAT at 44-0-20-728-1777.

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any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

User’s Guide EMS-MN-1110-10048

Activating service

Once registration is complete, your HSD Aeronautical Transceiver is assigned a Forward ID number—one for each channel card installed. These numbers act as ‘aircraft telephone numbers’.

Each Forward ID is assigned INMARSAT Mobile Numbers (IMN). A different IMN is assigned to each type of communication service supported by Inmarsat Swift64 (speech, 3.1k audio, 56k data, and 64k data, and 4.8 k). Two-channel systems are therefore assigned two IMNs for each service type.

Each service type also has a Multiple Subscriber Number (MSN) associated with it. The MSNs are programmed into the terminal adapter or other routing device. They serve to identify the service type requested on outgoing calls and to recognize and route incoming calls to the appropriate system device (telephone, fax, or computer).

Dial code prefixes are also associated with each type of service. Although the HSD Transceiver automatically selects the appropriate service, these dial code prefixes are used to override defaulted service types on a call-by-call basis.

Table 1 shows the factory default assignments associated with each service—as defined by the HSD Transceiver’s channel card.

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used for any purpose other than the purpose for which it was issued, nor is it to be copied or communicated in whole or in part, to

any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

HSD Aeronautical Transceivers

Table 1 HSD transceiver default settings

IMN

(Numbers

assigned

to aircraft)

MSN Service

Type

Dial code prefix

(Forces service

selection)

60xxxxxxx 40 Speech ¿ 81 ¿ 60xxxxxxx 20 3.1 k audio ¿ 82 ¿ 60xxxxxxx 30 56 k data ¿ 83 ¿ 60xxxxxxx 10 64 k data ¿ 84 ¿ 76xxxxxxx 40 4.8 k Low-

Speed Voice

¿ 80 ¿

When connecting external devices to the HSD Transceiver, ensure that the service type required by the device has been configured (or assigned) the correct setting.

Speech, 3.1k audio, 56 k data, and 64 k data are typically assigned 9-digit IMNs that begin with 60. Low-speed (4.8 k) voice is assigned a 9-digit IMN beginning with the digits 76.

Low-speed (4.8 k) is an inexpensive service option for placing voice calls—but it provides lower audio quality.

Both low-speed voice and 64 k speech calls use the MSN of 40; however, they are assigned different IMNs.

To select low-speed voice for outbound calls, use the dial code prefix ¿80 ¿. The default service type for outbound calls (if no dial code prefix is used) is 64 k voice.

CONFIDENTIALITY STATEMENT

This document contains information that is private and Confidential, and is supplied on the express condition that it is not to be

used for any purpose other than the purpose for which it was issued, nor is it to be copied or communicated in whole or in part, to

any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

User’s Guide EMS-MN-1110-10048

Operating considerations

The following section provides information on operating considerations that apply to HSD Transceivers.

Satellite transitions

The satellite beam used by the HSD transceiver changes as the aircraft moves from region to region at approximately the following coordinates:

• AORW (54°W) to AORE (15.5°W) at 34.75°W

• AORE (15.5°W) to IOR (64.5°E) at 24.5°E

• IOR (64.5°E) to POR (178°E) at 121.5°E

• POR (178°E) to AORW (54°W) at 118°W

Calls in progress (longer than ten minutes in duration) during beam crossover and satellite hand-off are terminated. Your connection needs to be re-established once the beam crossover and satellite hand-off are complete.

Satellite communications

Satellite communications have unique operating considerations:

• Communication, audio background-noise varies depending on the quality of the aircraft's sound insulation and handset quality

• Satellite communications experience a slight delay during two-way communication

CONFIDENTIALITY STATEMENT

This document contains information that is private and Confidential, and is supplied on the express condition that it is not to be

used for any purpose other than the purpose for which it was issued, nor is it to be copied or communicated in whole or in part, to

any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

HSD Aeronautical Transceivers

Setting up

HSD Transceivers provide a transmission link from the aircraft to the satellite network. This data link is compatible with a range of devices and operating systems providing the user with choice and flexibility in customizing their system.

This section provides general guidelines and instructions for a basic, system set-up only.

Consult the user manuals or help files of the devices and operating system installed in your onboard network for more system-specific instructions.

CONFIDENTIALITY STATEMENT

This document contains information that is private and Confidential, and is supplied on the express condition that it is not to be

used for any purpose other than the purpose for which it was issued, nor is it to be copied or communicated in whole or in part, to

any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

User’s Guide EMS-MN-1110-10048

ISDN data call requirements

The following equipment is required to make an ISDN connection using a HSD Transceiver:

• Computer

• Euro ISDN terminal adapter with an RJ-45

connector (standard ISDN connector)

• RJ-45 to RJ-45 cable (ISDN cable)

• Details of your Internet Service Provider: ISDN

and International dial-up access, Dial-up number, account name (User ID), and password

Another set-up option is to use a router instead of a terminal adapter.

Figure 3 and Figure 4 illustrate system setup options.

Bonded calls (two-channel systems only)

Bonded calls are possible with HSD transceivers that have two channel cards installed. Bonded calls utilize both 64 k channels to provide a single 128 k data channel. The terminal adapter or router places two separate calls to combine the data transfer over both channels.

Although bonded calls provide a single 128 k channel, the actual link capacity is application and protocol dependant. Typical throughput on a Multilink PPP TCP/IP connection is only 80 to 90 % of the link capacity (running Windows

2000).

The system can only make bonded calls if both channels are available. If another device is using one of the B Channels, then the data call proceeds—but as a single channel call.

If a bonded call is in progress, (using both B channels) the system is busy and denies all other calls until a channel is free.

CONFIDENTIALITY STATEMENT

This document contains information that is private and Confidential, and is supplied on the express condition that it is not to be

used for any purpose other than the purpose for which it was issued, nor is it to be copied or communicated in whole or in part, to

any third party other than the recipient organization, without the prior written permission of EMS Technologies Canada, Ltd.

HSD Aeronautical Transceivers

Powering up HSD transceivers

HSD aeronautical transceivers are typically powered up when the aircraft crew activates the avionics systems.

System readiness

HSD transceivers need Inertial Reference System (IRS) navigational data to operate. The avionics systems must be powered on and warmed up before the HSD is system-ready.

With all avionics systems ready, HSD transceivers only require a minute to warm-up. Dial tone, heard through a handset, indicates that the HSD transceiver is ready for use.

HSD transceivers automatically perform the following functions:

• Select a satellite

• Select a Spot Beam

• Select a Land Earth Station (LES)

• Log-on (register)

• Control satellite and Spot Beam handovers

+ 74 hidden pages

EMS HSD series User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual