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Iridium History

In 1987 Iridium was born as a concept by a team of Motorola engineers. Research and development was started into the first satellite-based personal mobile communications network. Iridium was developed to provide a reliable communication solution for the 80% of the world void of cellular coverage.

The Iridium Network

The Iridium Network's unique design allows voice, messaging and paging service to be routed virtually anywhere on the globe. Your telephone, messages and pages are relayed from satellite to satellite until it reaches the satellite located above your location from which the signal is relayed back toward earth.

The Iridium Satellite Networkwpe2E.jpg (2542 bytes)

There are 66 satellite in orbit around the earth on 6 orbital planes

Each orbital plane consists of 11 operational satellites and 1 in reserve.

The average life-span of the satellite is 5 - 8 years.

Satellite are in near-polar orbit at an altitude of 485 miles (780 km) and circle the earth once every 100 minutes.

Each spot beam can support 250 users at one time.wpe3.jpg (2898 bytes)


The Iridium World Services

There are four basic Iridium World Services:

Iridium World Satellite Service - Iridium World Satellite Service covers the earth's entire surface with 66 low earth orbit (LEO) satellites. This enables you to communicate with a handheld satellite telephone in locations where cellular or terrestrial service is either unreliable or non-existent. Callers to your Iridium phone number do not have to know your location in order to place a call, send a message or page.

Iridium World Roaming Service - Iridium World Roaming Service allows the user to use cellular networks throughout the world. When your phone is switched on, you are automatically registered with participating cellular networks. Callers can reach you through your cellular telephone number. You can use a cellular phone with Iridium World Roaming Service.

Iridium World Page Service - Iridium World Page Service covers the earth's entire surface and enables the user to receive messages in more than 200 countries. This service is available as a stand-alone service or as complimentary service to other Iridium services. The Iridium World Page Service allows you to receive alphanumeric messages of up to 120 characters in your native language.

H.M.S. Communications, Inc. provides a full range of Iridium services and equipment:

Global satellite voice and paging services through the smallest satellite terminals available

One convenient phone number and bill when roaming between wireless and satellite networks

Roaming onto previously incompatible cellular networks

Simple and cost-effective paging anywhere in the world

Full array of features - Voice Mail, Call Forwarding, Paging - to ensure you're always in touch

No charges to receive calls with Complete Calling Party Pays

Peace of mind through Stratos' extensive 24x 7 customer care

Future fax and data service enhancements

Competitive rate plans to suit your needs

Iridium Service Features

Personal Mailbox
Subscribers whose home network is Iridium are provided with a personal mailbox that can receive and store numeric messages, text messages, and voice mail* messages.

* Voice Mail
Voice mail allows callers to leave a recorded message in a personal mailbox. This optional feature is available to "Iridium-homed" subscribers.

Text Messaging
Text messaging allows subscribers to receive short text messages on their phones and pagers. The phone may receive messages of up to 160 characters, while the pager may receive messages of up to 200 characters.

Numeric Messaging
Numeric messaging allows for the sending of numeric messages via a touch-tone phone to the subscriber's phone or pager. This feature is only available to Iridium-homed subscribers.

Call Forwarding
Call forwarding allows users to redirect incoming calls to another phone number.

Call Barring
Call barring service enables the user to bar all outgoing or incoming calls. This service is especially useful when a user is lending his phone to someone else.

Emergency Calling
Emergency calling allows the subscriber to place an emergency call in most the world by dialing an abbreviated number.


Here are links to H.M.S. Communications Inc.'s Iridium Equipment and Accessories

Motorola Equipment and Accessories


hmscomweb2.gif (15735 bytes)dealer_p.gif (1989 bytes)icon_p.gif (1704 bytes)H.M.S. Communications, Inc.'s products and services are provided by Stratos, an international multi-network mobile satellite service provider offering a complete range of communications solutions.

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Copyright 1999 Donegal Holdings Ltd., Inc.
Last modified: May 15, 2006