IridiumDataServicesWhitePaper
Iridium Satellite Data Services
White Paper
Version 1.1.2
September 29, 2006
WHITE PAPER
Purpose:
!"#$%&'()*+,-%&+$(.#/+$%0.#&#)*%12-+33#-+4$%()..+,-%&2-2%$+.5#(+$6%!"+%'/7+(-#5+%#$%-'%8.'5#&+%2,%
overview of the Iridium satellite network, hardware and data services to aid in the selection of an
appropriate data service for a particular integrated data application. This document does not
contain detailed technical information.
Scope:
This white paper covers the following areas
!
Iridium Satellite Network
!
Iridium Hardware
!
Iridium Dial-Up Data
!
Iridium Direct Internet
!
Iridium Router Based UDI Connectivity Solution [RUDICS]
!
Iridium Short Burst Data (SBD)
!
Iridium Short Message Service (SMS)
This paper provides basic system information and parameters; it does not contain a detailed
technical description of each service. This paper assumes a reasonable knowledge of data,
telephony and satellite communications.
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Iridium Satellite Network Overview
The Iridium System is a satellite-based, wireless communications network providing a robust suite of
data services to virtually any destination anywhere on earth. The Iridium system comprises three
principal components: the satellite network, the ground network and the Iridium subscriber products
including phones and pagers. The design of the Iridium network allows data to be routed virtually
anywhere in the world. Data calls are relayed from one satellite to another until they reach the satellite
above the Iridium Subscriber Unit and the signal is relayed back to Earth.
The on-orbit Iridium constellation consists of 66 operational
satellites and spares in a constellation of six polar planes.
Each plane has 11 mission satellites performing as nodes in
the telephony network. The spare satellites are on orbit ready
to replace any unserviceable satellite. This constellation
ensures that every region on the globe is covered by at least
one satellite at all times. The satellites are in a near-polar
orbit at an altitude of 485 miles (780 km). They circle the
earth once every 100 minutes traveling at a rate of 16,832
miles per hour. Each satellite is cross-linked to four other
satellites; two satellites in the same orbital plane and two in
an adjacent plane. The satellite constellation is expected to
provide continuous global coverage until 2014 without any
additional launches of satellites.
The ground network is comprised of the System
Control Segment and gateways used to connect into
the terrestrial data networks. The System Control
Segment is the central management component for
the Iridium system. It provides global operational
support and control services for the satellite
constellation and delivers satellite tracking data to the
gateways. The System Control Segment consists of
three main components: Four Telemetry Tracking and
Control sites, the Operational Support Network, and
the Satellite Network Operation Center. The primary
linkage between the System Control Segment, the
satellites, and the gateways is via K-Band feeder links
and cross-links throughout the satellite constellation.
Gateways are the terrestrial infrastructure that provides interconnection to the
terrestrial data networks. Gateways also provide network management functions
for their own network elements and links.
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Iridium Satellite LLC Distribution Channels
Iridium has established a number of distribution channels for its services and products. The intent with
each channel is to maximize either the distribution of existing products and services or to enable products
and services to be integrated into specific vertical market applications. Specific descriptions of each
channel are included below. Information on how to contact a distribution partner of the Iridium can be
found on the Iridium web site at http://www.iridium.com.
Iridium Service Partner (SP)
SPs typically sell Iridium products and services through a distribution channel that encompasses both
regional and vertical market attributes. SPs typically sell handsets or specific vertical market
implementations of handsets (e.g. a maritime or aviation version) along with voice and basic circuit
switched data services.
Iridium Value Added Reseller (VAR)
VARs incorporate a specific Iridium Subscriber Unit and service into a complete end to end solution for a
particular customer or vertical market. A VAR is a company that provides a total wireless data solution for
an end customer. They integrate all hardware and software for both the remote device as well as the back
office/host computer system. VARs also directly sell Iridium Satellite Data Services with their solution.
Iridium directly supports Iridium VARs with technical information. Iridium VARs are selected based upon
experience, a repeatable business case and other factors.
Iridium Value Added Manufacturer (VAM)
A VAM is a company that has particular expertise in a vertical market and wishes to integrate an Iridium
voice or data module into a finished or OEM product. VAMs do not resell voice or data services directly
from Iridium. Iridium directly supports VAMs with technical information.
Iridium Value Added Developer (VAD)
A VAD is a company that has particular expertise in a vertical market such as back office systems for
processing data from remote Iridium units and needs to work more closely with Iridium to integrate their
back office system. VADs do not resell voice, data services or equipment directly from Iridium. Iridium
directly supports VAMs with technical information.
Note that Iridium uses many criteria in selecting business partners and also utilizes a multi-tiered
distribution structure.
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Iridium Hardware
9522A L-Band Transceiver
The 9522A L-Band Transceiver (LBT) is intended for incorporation into an integrated voice and/or data
solution or product. The LBT is simply the core transceiver module that is required in order to
communicate over the Iridium network. Additional components are required such as power supply,
antenna, environmental protection and the serial based interface between the LBT and th+% ()$-'*+.4$%
application.
The LBT provides two interfaces for data applications. A TNC connector is provided for the RF connection
to the antenna. A DB25 connector is provided for power, on/off control and a RS232 serial data.
Basic Specifications:
Dimensions
Length (including antenna connector)
Length (excluding antenna connector)
Width
Depth
Weight (approximate)
DC Power Input Specifications
Main Input Voltage - Range
Main Input Voltage - Nominal
Main Input Voltage - Ripple
Peak Input Current (maximum)
Main Input Active Power (average)
Main Input Standby Power (average)
Value
216.1 mm (8.51")
196.4 mm (7.73")
82.6 mm (3.25")
39.0 mm (1.54")
610 g
Value
+4.0 VDC to +4.8 VDC
4.4 VDC
40 mVpp
2.5 A @ 4.4 VDC
2200 mW
570 mW
Service Capabilities:
Circuit Switched Data (CSD)
Voice Telephony
Short Burst Data (SBD)
Short Message Service (SMS)
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9601 SBD Transceiver
The 9601 SBD Transceiver is intended for incorporation into an integrated data only solution or product.
The 9601 is simply the core transceiver module that is required in order to communicate via the Short
Burst Data Service over the Iridium network. Additional components are required such as power supply,
antenna, environmental protection and the serial based interface between the 9601 and the end user
application.
The 9601 has two connectors, a SMA for the antenna and a header connector for power, on/off control,
RS232 interface, and a network available output. Applications can readily drive the transceiver using an
extended AT Command Set. Due to the use of L-Band as the operating frequency for Iridium, small
antennas can be used.
Basic Specifications:
Parameter
Length
Width
Depth
Weight (approximate)
Value
106 mm
56.2 mm
13 mm
117g
Parameter
Main Input Voltage Range
Main Input Voltage Nominal
Main Input Voltage 9 Ripple
Consumption at +5.0 VDC
Input Standby Current (average)
Peak Transient Current 9 Transmit
Current Average 9 when SBD message transfer in process
Average Power consumption 9 when SBD message transfer in process
Value
+4.5 VDC to +5.5 VDC
5.0VDC
40 mV pp
Value
66mA
1.5 A
<= 350 mA
<= 1.75 W
Service Capabilities
Short Burst Data (SBD)
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Iridium Dial-Up Data Service
Service Description
Iridium Dial-Up Data Service is an asynchronous, circuit switched, 2400 bits per second, bi-directional
service. Data calls can be originated:
!
From an Iridium Subscriber Unit (ISU) to the Public Switched Telephone Network (PSTN) as
shown in Figure 1
!
From the PSTN to an ISU as shown in Figure 1
!
From one ISU to another ISU as shown in Figure 2
An RS232C interface with AT Commands is used for making a data call. Data connections to the PSTN
operate at 2400 bits per second. Terminating PSTN modems should be configured to start negotiating at
4800bps in order to minimize modem negotiation time. A document detailing the AT Commands is
available to authorized developers.
Figure 1
A Circuit Switched Data Call from a remote application (ISU) to the PSTN.
5
2
1
Remote
Application
using the LBT
4
2
Iridium Gateway 3
4
5
Host
Application
PSTN
D900
Sequence of Events:
1.
2.
3.
4.
5.
Application dials ,)*/+.%',%:1!;%)$#,<%=!%>'**2,&$%?+6<6%@@AABCBDDE
Call request is routed over the constellation for user authentication and call set-up (~5 sec)
Switch makes connection to dialed number (~5 sec)
Analog modem in gateway and analog modem in host application synchronize (~30 sec).
End-to-End connection established, over the constellation, between the Host Application and Mobile
Application
Note that it is also possible to for the Host Application to initiate the call to the remote application by
dialing the MSISDN-C of the remote application beginning with the International dialing prefix followed by
the Iridium Country code number (8816) and the eight digit number.
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Figure 2
A Circuit Switched Data Call between two ISUs.
3
2
5
3
1
2
Iridium Gateway
2
Mobile
Application
(MA#1)
D900
Inter-Working
Equipment
5
4
Mobile
Application
(MA#2)
Sequence of Events:
1.
2.
3.
4.
5.
Mobile Application #1 dials MSISDN or MSISDN-C of MA#2
MA#1 call is set-up and connected to inter-working equipment
Ring alert and call set-up issued by gateway to MA#2
MA#2 answers incoming call request (total set-up ~25 sec)
End-to-End connection established between MA#1 & MA#2
Dial-Up Data Applications
Dial-up data is suitable for applications that require direct computer-to-computer or device-to-device
connections. Each device or computer should be connected to a PSTN modem or an ISU.
Sample applications for this type of service include:
!
Connecting Remote Terminal Units (RTUs) to central control and monitoring systems.
!
Connecting monitoring equipment to central data collection systems.
!
Continuous real time transfer of data.
!
Dialing into an Internet Service Provider.
!
Dialing into a LAN (Local Area Network.)
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Iridium Direct Internet Service
Service Description
Direct Internet is a service that allows a subscriber with a Windows-based computer to access the
Internet over the Iridium network using an optimized circuit switched data channel. If the destination
computer is a computer connected to the Internet and has an Internet Protocol (IP) address then the
Iridium Direct Internet Service is usually the best option if the remote user is using a standard Windows
based operating system.
Figure 3
A Direct Internet Data Call from a remote application (ISU) to the Internet.
Figure 3
2
Iridium Gateway
2,3
Internet
1, 3,4
D900
Internet
Server
Mobile
Application
(MA#1)
Sequence of Events:
1.
2.
3.
4.
MA#1 client Direct Internet Software dials the number for the Direct Internet Server
MA#1 call is set-up and connected to the Direct Internet Server
MA#1 negotiates connection protocol and authenticates with Direct Internet Server (~ 12 seconds)
Standard Internet applications software can then access the Internet
F#.+(-% 0,-+.,+-% )$+$% G',-the-H3IJ% &2-2% ('*8.+$$#',% to increase the effective data throughput. The
compression ratio depends on the type of data being sent or received; text is highly compressible
whereas JPEG graphics files are not compressible. Although the underlying channel rate is 2400bps, the
effective throughput is typically higher. Direct Internet connections can only be originated from an ISU.
Connections to an ISU cannot be originated from the Internet. Figure 3 illustrates the call path. The
compression in Direct Internet works on email (SMTP and POP), web (http) and FTP. Currently supported
Windows versions include Windows 95, 98, NT4.0, Me, 2000 and XP.
Direct Internet Service Applications
Typical applications include:
!
Email 9 Send and receive email using Outlook, Eudora or other email client
!
FTP (File Transfer Protocol) for transferring data files.
!
Web browsing 9 primarily on text based sites.
!
Telnet sessions
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Iridium Point-to-Point Protocol (PPP) Service
Service Description
PPP is essentially a hybrid between the Direct Internet Data service and the Dial-Up Data service. The
user sets up a standard Dial-Up Networking connection that dials directly into the Direct Internet server,
thus eliminating the analog modems required in a PSTN connection. Since PPP does not utilize the
Direct Internet software, it does not provide the enhancements of compression. The advantage of this
service is that you have the stability of a Direct Internet call without having to load the Direct Internet
software on the client side. Set-up times of calls are reduced and the percentage of established calls is
significantly higher than using the PSTN to connect to an ISP.
This service only works when a call is originated by an ISU to the PPP server in the gateway. The PPP
server cannot call the ISU. The ISU is not assigned an IP address. Figure 4 illustrates the call path.
PPP service is designed for use in applications where a computing device needs to connect to a
computer via to the Internet. Direct Internet relies on software that only supports Windows operating
systems. Third party PPP protocol software is available from other sources for many computing platforms
and devices. Note that Iridium only provides limited support for use of the PPP Service.
Figure 4
A PPP Data Call from a remote application (ISU) to the Internet.
Figure 4
2
Iridium Gateway
2,3
Internet
1, 3,4
D900
PPP Internet
Server
Mobile
Application
(MA#1)
Sequence of Events:
1.
2.
3.
4.
MA#1 dials the number for the PPP Server
MA#1 call is set-up and connected to the PPP Server
MA#1 negotiates the PPP connection protocol
Standard Internet applications software can then access the Internet via the TCP/IP stack
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PPP Service Applications
Iridium PPP service is designed to serve two types of applications:
1) Direct connection to the Internet for non-Windows based computing platforms. Linux, Apple, Palm
and other operating systems can be configured to use a PPP client for communication to the Internet.
[Windows based applications should use Iridium Direct Internet Service.]
2) Application specific data communications for telemetry, remote monitoring or tracking of field based
assets.
Non-Windows based systems, with typical applications utilizing the Internet, include email, file transfer,
telnet and other terminal sessions. PPP service allows connection to any publicly available IP address on
the Internet.
For specific applications, this service could be used with an Iridium 9522A L-Band Transceiver in an
integrated application. An applications developer could integrate the service and hardware to provide data
connectivity from a remote or mobile application to an IP address over the Iridium network.
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Iridium Router based Unrestricted Digital Interworking
Connectivity Solution [RUDICS]
Service Description
RUDICS is a circuit switched data service designed to be incorporated into an integrated data solution.
Integrated data solutions are applications such as remote asset monitoring, control, and data file transfer.
Often these applications are designed to support hundreds or thousands of remote units. The other circuit
switched data services mentioned in this paper are sometimes sub-optimal for such applications. RUDICS
is designed to take advantage of the global nature of the Iridium communications system and combine
that with a modern digital connection between the Iridium Gateway and the Value Added Resellers
centralized application server or Host Application.
KLF0>1%)$+$%-"+%$2*+%(#.()#-%$M#-("+&%&2-2%$+.5#(+%-"2-%#$%&+$(.#/+&%#,%-"+%$+(-#',$%',%GF#23-L8%F2-2J%
and Direct Internet. The difference and key benefit comes in the equipment used to terminate or originate
the call in the Iridium Gateway.
Figure 5 illustrates the call path for a Mobile Originated call.
Figure 5
A RUDICS Data Call from a remote application (ISU) to the central Host Application
2
5
4
2
Iridium Gateway
4
3
1
Mobile
Application
D900
RUDICS
Server
5
Host
Application
Internet
OR
Leased
Line
Sequence of Events:
1.
2.
3.
4.
5.
Mobile application places call to a custom RUDICS Server Number
Call request is routed over the constellation for user authentication and call set-up.
Switch connects to RUDICS Server, secondary authentication conducted
RUDICS Server terminates call to pre-configured IP Address
End-to-End IP connection established, over the constellation, between the Host Application and
Mobile Application
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Figure 6 illustrates the call path for a Mobile Terminated call.
Figure 6
A RUDICS Data Call from a central Host Application to the remote application (ISU).
4
5
4
4 1
4
Iridium Gateway
Mobile
Application
D900
3
2
RUDICS
Server
5
Host
Application
Internet
OR
Leased
Line
Sequence of Events:
1.
2.
3.
4.
5.
Host application places telnet call to RUDICS Server
RUDICS Server Authenticates Host
Call request is routed to the switch for call set-up
Call request is routed over the constellation for user authentication and call set-up.
Mobile Application answers call. End-to-End IP connection established, over the constellation,
between the Host Application and Mobile Application
RUDICS uses routers to allow termination and origination of circuit switched data calls to and from a
specific IP address via a Telnet protocol. The capability is designed to support applications that have
many field devices and one central host application. The service allows field devices to directly call the
host application and the host application is able to directly call the field devices.
Connectivity between the Iridium Gateway and the Host Application can be by a variety of methods,
including Internet, Virtual Private Network and Leased Line
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RUDICS has a number of advantages over other methods of originating and terminating Circuit Switched
Data calls on Iridium. The following table describes some of these advantages:
Service Type
Limitation
RUDICS Advantage
Dial Up Data
Analog modem training time
No modem training time and therefore
lower cost per call
Dial Up Data
PSTN origination fee set by long distance or
international carrier
Service rates are identical for Mobile
Originated or Mobile Terminated calls
Direct Internet
Remote unit must initiate session. Unit
cannot be called directly from an IP Address
Calls can be Mobile Originated and
Mobile Terminated
Direct Internet
Requires Windows Operating System
No Operating System requirement
Direct Internet
Remote unit IP address is non-routable
Routable IP addresses.
Direct Internet
TCP/IP Stack negotiation uses billable
airtime
Application vendor can select
appropriate protocol
PPP Service
Requires TCP/IP Stack
No TCP/IP Stack Required
PPP Service
Remote unit must initiate session. Unit
cannot be called directly from an IP Address
Calls can be Mobile Originated and
Mobile Terminated
PPP Service
Remote unit IP address is non-routable
Routable IP addresses.
PPP Service
TCP/IP Stack negotiation uses billable
airtime
Application vendor can select
appropriate protocol
RUDICS Service Applications
Typical applications include:
!
Email 9 Sending and receiving of email using custom applications software
!
FTP (File Transfer Protocol) for transferring data files.
!
Periodic data reporting by remote sensors
!
Polling of remote units to collect data
!
Control of remote equipment
Note that RUDICS is typically best suited for applications that deploy more than 500 units, which
report to a central host application.
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Iridium Short Burst Data (SBD) Service
Service Description
Iridium Short Burst Data (SBD) Service is an efficient network protocol designed for shorter sized data
messages than can be economically sent via Iridium Circuit Switched Data Services. SBD uses a
proprietary network protocol to transfer data messages to and from the remote terminal. An overview is
shown in Figure 7.
It is possible to send Mobile Originated (MO-SBD) and Mobile Terminated (MT-SBD) messages.
Message size for MO-1NF%#$%/+-M++,%B%2,&%BOP@%/I-+$6%?@%/I-+%*+$$2<+$%2.+%.+H+..+&%-'%2$%G*2#3/'Q%
("+(R$6JE% S+$$2<+% $#T+% H'.% S!-SBD is between 1 and 1890 bytes. The maximum message size
depends on whether a 9601 or 9522A transceiver is used. (The 9601 has shorter message lengths, but
the hardware costs less, it supports up to 340 bytes MO-SBD and 270 bytes MT-SBD)
The target vertical markets for SBD are Logistics, Oil, Gas, Rail, Maritime, Aeronautical, and Utility
industries as well as applications in the Government and Military sectors. Iridium itself does not provide
complete end-to-end solutions. However, it looks to selectively partner with skilled Value Added
Resellers (VARs) to integrate the required hardware, software, and SBD service that ultimately forms the
complete packaged solution for the end customer.
Remote Applications send Mobile Originated SBD (MO-SBD) data messages via an Iridium Transceiver.
The application microcontroller or microprocessor communicates with the Transceiver using AT
commands over an RS232 serial port. The application loads the data message into the Transceiver and
instructs it to send the data message. The data message is transmitted across the Iridium satellite
network utilizing inter-satellite links to reach the Iridium Gateway. From there the data message is
transferred via e-mail or an IP Socket to the VARs host computer system. Here the message is stored in
a database for further data processing.
Mobile Terminated SBD (MT-SBD) messages are sent to the Iridium Gateway via e-mail or IP Socket
from the VARs host computer system. Providing that the Transceiver has been appropriately configured
and provisioned, the Iridium Gateway M#33% $+,&% 2% GK#,<% =3+.-J% -'% -"+% -.2,$(+#5+.% M"+,% 2% S!-SBD
message has been queued. The Mobile Application can then decide whether to retrieve the MT-SBD
data message at that time or later.
Global network transmit latency for delivery of messages ranges from approximately 5 seconds for short
messages to approximately 20 seconds for maximum length messages. This latency is the elapsed time
during the actual transmission of the data message between the Transceiver and the Iridium Gateway.
Additional latency introduced by the Internet, remote application, private IP network connection or the
()$-'*+.4$%"'$-%$I$-+*%#$%,'-%#,%0.#&#)*4$%(',-.'3 and is not included in the latency times mentioned.
Due to the nature of the Iridium system architecture, SBD operates uniformly at all latitudes and
longitudes. It is not affected directly by precipitation.
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Figure 7
A SBD Data Call from a remote application (ISU) to the Internet.
5
Iridium Gateway
Sensor or
other
inputs/outputs
2,7,8
Iridium 9601
SBD Transceiver
1,2,3,7,9
Microprocessor
Based
System
Internet
Or VPN
Or Leased
line
4,5
3,6,8
SBD Network
Equipment
Value Added Reseller
Host System
RS232 Serial
Interface
End User Applications
Mobile
Application
[MA]
Sequence of Events: MO-SBD
1) MA loads the MO-SBD data message into the L-Band Transceiver.
2) MA instructs the L-Band Transceiver to send the SBD Message to the Iridium Gateway
3) Iridium Gateway SBD Equipment receives the SBD Message; sends an acknowledgement to the MA
and creates an email IP message with the SBD data message as an attachment to the email OR the data
is transmitted via an IP Socket
4) MO-SBD message is sent to the destination email or IP Socket server hosted by the Value Added
Reseller for processing of the data message.
Sequence of Events: MT-SBD
5) Data message is sent via email or IP socket to the Iridium Gateway server by the Value Added
K+$+33+.4$%U'$-%1+.5+.6
6) Iridium Gateway SBD Equipment receives the MT-SBD Message and stores it in a database.
PE%0.#&#)*%V2-+M2I%#$$)+$%2%GK#,<%=3+.-J%-'%-"+%-.2,$(+#5+.%-"2-%,'tifies it of a waiting message(s).
CE%!"+%S=%#,#-#2-+$%2%GS2#3/'Q%>"+(RJ%2,&%-"+%S!-SBD Message is downloaded to the L-Band
Transceiver.
8) The L-Band Transceiver sends an acknowledgement to the Iridium Gateway that the MT-SBD
Message has been delivered.
9) MA extracts the MT-SBD Message from the L-Band Transceiver and processes the message.
Iridium SBD Service Applications
Iridium SBD Service is designed to serve a range of applications that need to send data messages that
on average are typically less than 300 bytes.
Specific applications may include:
!
!
!
!
!
Flight following for aircraft and helicopters
Tracking and messaging for maritime vessels
Tracking of mobile land based assets such as containers, trucks and heavy equipment
Monitoring of equipment on oil and gas pipelines
Monitoring of equipment of water, gas and electric utility distribution networks
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Iridium Short Message Service (SMS)
Service Description
Short Message Service is a GSM based system capability designed for both Mobile Origination (MO) and
Mobile Termination (MT) of short text messages. There are numerous GSM-SMS applications developed
for terrestrial GSM networks. It should be possible to adapt existing terrestrial based applications and also
develop new applications using the Iridium SMS service.
Iridium Gateway
Remote
Application
Inter-carrier
SMS broker
The
SMSC
D900
Iridium SMS service offers the following capabilities:
!
!
!
!
!
!
!
Two-way global text messaging.
Send to and receive from other Iridium SMS subscribers.
Send to and receive from email addresses. Iridium subscribers are able to receive SMS
messages via <MSISDN>@msg.iridium.com, where <MSISDN> is the Iridium phone number.
Send to and receive from cellular subscribers (when available.)
160 characters per message.
Messages will be stored until delivered (up to 8 days.)
Supported on 9505 handsets and 9522 LBTs with SMS capable firmware.
! SMS messages can be entered into the phone in one of two ways:
! W#2%-"+%8"',+4$%R+I82&
! W#2%-"+%8"',+4$%&2-2%8'.-X%)$#,<%$-2,&2.&%=!%('**2,&$
Iridium SMS Service Applications
The Iridium SMS Service can be used to serve a range of applications that can send useful information
within the 160-character limit of each message.
Specific applications may include:
!
!
!
!
!
!
Weather information & alerts
Schedule information
News & Sports information
Personal messaging
Basic email messaging
Monitoring of remote applications
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!
Choosing A Data Service
There are many reasons that a particular data service may be chosen. The purpose of the table
below is to assist in narrowing down the choices and is not an exhaustive selection matrix. In addition
to technical details, commercial information such as the usage profile and service pricing is also
required in order to determine the most appropriate data service.
Service Name
Typical Use
Transfer Type
Direct Internet
Remote access to Internet based personal email service
using a Windows based computer
Human to
Machine
Dial-Up Data
Remote access to a corporate email service not
connected to the Internet
Human to
Machine
PPP Service
Access to the Internet by a computer without a Windows
Operating System
Human to
Machine
RUDICS
Short Burst Data
Large scale monitoring of fixed or mobile assets beyond
typical terrestrial coverage
Machine to
Machine
Direct Internet
Dial-Up Data
RUDICS
File transfers that typically are 500 bytes or more per
transfer
Machine to
Machine
Short Burst Data
File transfers that typically are less than 500 bytes per
transfer
Machine to
Machine
Short Burst Data
Frequent short file transfers [Less than 500 bytes]
Machine to
Machine
RUDICS
Short Burst Data
Integrated data applications
Machine to
Machine
Direct Internet
Dial-Up Data
PPP
General ad-hoc file transfer [Human to Machine]
Human to
Machine
Short Message Service
Send or receive short email (text message)
Human to Human
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List of Abbreviations
ISU 9 Iridium Subscriber Unit
ISP 9 Internet Service Provider
LBT 9 L-Band Transceiver
MO 9 Mobile Originated
MT 9 Mobile Terminated
PPP 9 Point to Point Protocol
PSTN 9 Public Switched Telephone Network
RF 9 Radio Frequency
RUDICS 9 Router based Unrestricted Digital Interworking Connectivity Solution
SBD 9 Short Burst Data
SIM 9 Subscriber Identity Module
VAM 9 Value Added Manufacturer
VAR 9 Value Added Reseller
Disclaimer
This document contains information for the Iridium Data Services. Reasonable effort has been made to make the information
in this document reliable and consistent with specifications, test measurements and other information. However, Iridium
Satellite LLC makes no guarantee or warranty of, and does not assume liability with respect to, the accuracy or the
completeness of such information, or as to the results of use of the transceivers or services in any specific instance, and
hereby expressly disclaims any implied warranties of merchantability or fitness for a particular purpose, or any other warranties
or representations whatsoever, express or implied. The application developer assumes the full risk of using this specification
and any other information provided. In no event shall Iridium Satellite LLC be liable for any actual, direct, indirect, punitive, or
consequential damages arising from such use, even if advised of the possibility of such damages. Iridium Satellite LLC does
not warrant that this document is accurate or complete and reserves the right in its sole discretion to change product
specifications and materials without notice to you at any time.
Further Information
To contact Iridium Satellite:
!
In the USA please call: 1-866-947-4348
!
Outside of the USA please call: +1-480-752-5155
!
Or email to info@iridium.com
!
Or visit our web site at www.iridium.com
All Trademarks are the property of their respective owners.
© 2003 & 2006 Iridium Satellite LLC
Iridium and the Iridium logo are registered trademarks and service marks of Iridium Satellite LLC.
IRIDIUM DATA SERVICES
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