Revision History .......................................................................................................................................... 3

Contents ..................................................................................................................................................... 4

List of Abbreviations .................................................................................................................................. 8

Product Overview ............................................................................................................................... 9

1.1

Key Features .......................................................................................................................... 9

1.2

Iridium 9523 Packaging and Regulatory Certification ............................................................ 9

1.3

FCC Warning Statement ...................................................................................................... 10

1.4

Industry Canada Warning Statement ................................................................................... 10

1.4.1

English ................................................................................................................................. 10

1.4.2

French .................................................................................................................................. 10

1.5

Software Revision ................................................................................................................ 11

1.6

Reference ............................................................................................................................. 11

Physical Specification ..................................................................................................................... 13

2.1

Dimensions and Layout ....................................................................................................... 14

2.2

Field Application Board Mounting ........................................................................................ 15

2.3

Environmental ...................................................................................................................... 18

2.3.1

Environmental Specification ................................................................................................. 18

2.3.2

Environmental Tests Performed .......................................................................................... 18

Electrical Interfaces ......................................................................................................................... 19

3.1

User Connector .................................................................................................................... 19

3.1.1

User Connector Type ........................................................................................................... 19

3.1.2

User Connector Pin Allocation ............................................................................................. 20

3.2

DC Power Supply Interface .................................................................................................. 22

3.2.1

Battery Power Input, VBAT .................................................................................................. 22

3.2.2

Boost Power Input, VBOOST ............................................................................................... 22

3.2.3

Power On/Off Control, TRX_ON .......................................................................................... 22

3.2.4

Typical Power Usage Profile ................................................................................................ 22

3.3

PCM Digital Audio ................................................................................................................ 24

3.3.1

Port 1 .................................................................................................................................... 25

3.3.2

Port 2 .................................................................................................................................... 25

3.3.3

11Hz Signal for Manufacturing and Regulatory Testing ...................................................... 25

3.4

DPL port ............................................................................................................................... 26

3.5

Data/Fax port ....................................................................................................................... 26

3.5.1

9-Wire and 3-Wire Operation ............................................................................................... 26

3.5.2

Configuration Settings .......................................................................................................... 27

3.5.3

Modes of Operation ............................................................................................................. 28

3.5.4

Serial port signal levels ........................................................................................................ 28

3.6

SIM interface ........................................................................................................................ 28

3.7

GPIO Signals ....................................................................................................................... 28

3.7.1

Transmit power Control ........................................................................................................ 29

3.7.2

External GPS Receiver Switch ............................................................................................ 29

3.7.3

Modem/Handset Mode Select Signal................................................................................... 29

RF Interface ....................................................................................................................................... 30

4.1

RF Connector Type .............................................................................................................. 30

4.1.1

Antenna Characteristics ....................................................................................................... 30

4.2

RF Interface Specifications .................................................................................................. 30

4.3

Radio Characteristics ........................................................................................................... 31

4.4

S-meter Performance ........................................................................................................... 31

AT Interface ....................................................................................................................................... 32

5.1

Command Types .................................................................................................................. 32

5.2

Basic Commands ................................................................................................................. 32

Iridium Communications, Inc.

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Information Contained in this Guide

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