GAN - Global Area Network
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Nera M-4
TT-3080A Capsat Messenger
Mobile IP
TT-3080A Mobile Messenger

H.M.S. Communications, Inc.

Inmarsat GAN - (Global Area Network)

Inmarsat M4 service extends a company's WAN (wide area network) via satellite into the world's most remote regions, creating a Global Area Network.  The service is designed to meet the large data transfer requirements of users in the oil and gas, resource exploration, and broadcast sectors. 

Stratos; M4 service offers voice (4.8Kbps) and high-speed data (HSD) capabilities to users in the Inmarsat global spot beam coverage area.

High-Speed Data

The M4 unit offers built-in high-speed data 56/64 Kbps) capabilities through an Integrated Services Digital Network (ISDN) interface compatible with off-the-shelf ISDN peripherals, such as modems and video conferencing equipment.  With multiplexing, the 64 Kbps channel can also be subdivided into several slower speed voice, fax and data circuits, with 8 Kbps typically used for each voice circuit and 9.6 Kbps for each fax circuit. Depending on the terminal manufacturer, a standard analog telephone interface may also be provided for telephone, fax and modem equipment.


The M4 terminal is significantly smaller than an Inmarsat-B terminal, The M4 terminal is approximately the size of a standard laptop computer and weighs 9 lbs (4 kg). Shipped with a battery, it delivers more than 100 hours standby time.

Advantages - Media Sector
  • broadcast quality audiom4_term.jpg (5203 bytes)
  • video conferencing
  • high resolution photo transfers
  • store-and-forward video transfer
  • web access
  • Internet e-mail
Advantages - Lower Terminal and Service Rates

M4 terminals cost substantially less than Inmarsat-B land units.  M4 service also offers voice and HSD at rates significantly below Inmarsat-B, with voice charges comparable to mini-M and HSD service rates approximately one-third less than Inmarsat-B

High-Speed Data Applications
  • web access
  • G3 fax (14.4 Kbps)
  • WAN connectivity
  • image transfer
  • broadcast quality audio
  • Internet e-mail
  • large file transfer (ftp)
  • video conferencing
  • store-and-forward video
Stratos High-Speed Mobile Mailbox Service.

This service provides an "off the shelf" high-speed mobile satellite Internet messaging and communications solution to customers requiring extended functionality for their M4. A low monthly fee provides  a subscriber with their own mailbox that optimizes large data transfers via internet e-mail and FTP between mobile and fixed users.

Special Services

Special applications that are supported through the M4 service are remote diagnostics, remote monitoring, encryption systems with (STU-III), data streaming and telemedicine.

SIM Card Compatible

M4 terminals like its mini-M predecessor come equipped with a SIM (subscriber identity module) card reader. Multiple SIM cards are supported and can be all used on the same M4 terminal. This enables the establishment of unique accounts for each SIM card.

dealer_p.gif (1989 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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Last modified: May 15, 2006