Lars Thrane Iridium LT-3100 Satellite Communications System
Lars Thrane Iridium LT-3100 Satellite Communications System

Lars Thrane Iridium LT-3100 Satellite Communications System

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Pirate attacks around the world are still seen as a real threat to crews and vessels. As a consequence, more and more vessels are fitted with a citadel (safe room). Reliable communication is crucial in these situations.

The LT-3100 Satellite Communications System is a maritime fixed Iridium satellite phone from Lars Thrane A/S. The LT-3100 system is designed for the professional market (deep sea, fishing, and workboats), but can be used for the leisure market as well. The LT-3100 system meets all standards and certification requirements needed for worldwide maritime satellite communication equipment.

Iridium Satellite Phone
Iridium Satellite Phone


The LT-3100 system has voice and data capabilities with 100% global coverage. The LT-3100 system consist of a control unit, handset unit, and antenna unit. A single cable solution connects the control unit with the antenna unit. Using a standard coaxial cable, up to 500 meters of separation between the units can be obtained, giving freedom to mount the antenna in the best possible location, with free line of sight to the satellites.

The LT-3100 system can be used as the primary satellite communication product on vessels, covering the basic communication needs in terms of connectivity between the ship and shore. In addition, the LT-3100 system can be used for crew calling or as a back-up satellite communication product. The LT-3100 system provides voice, SMS, data, vessel tracking, and other Iridium services with competitive airtime rates, making it the perfect satellite communication product on board any vessel. The LT-3100 Iridium Communications System is designed and built for the demanding and rough environment at sea and with an operational temperature range from -25⁰C to +55⁰C (-13⁰F to +131⁰F).



The LT-3100 system is very easy to install and requires no yearly maintenance or service. Everything is included in the box to get started with the installation and operating the LT-3100 system. The control unit can be installed using either a bracket mount or flush mount. The antenna unit can be mounted using either a pole mount (1.5″ tube) or angle bracket mount (1″ to 2.5″ tube). The control unit has a large 4.3″ TFT display, from where the system can be operated with overview and ease. The built-in webserver can be used for service and maintenance.


LT-3100 Satellite Communications System Key Features :

  • Voice, SMS, SBD, and Modem Data.
  • 2.4 kbps and 9.6 kbps compressed data.
  • Single antenna cable solution (up to 500 m).
  • High-performance GNSS/GPS receiver.
  • High quality microphone, speaker, and equalizer for improved audio performance.
  • Large 4.3” TFT-LCD display supporting day and night modes.
  • Voice prompt audio feedback.
  • Firewall and user authentication for high level of security.
  • Webserver for configuration and maintenance.
  • Support external LAN Wi-Fi Access Points.
  • Support external SIP PABX and SIP handsets.
  • Support OnSatMail (AST) and SkyFile Mail (Marlink).
  • Iridium Mail & Web (iOS, Android) via RedPort Optimizer (GMN).
  • Vessel tracking (SBD, SMS, E-mail).
System Configuration
System Configuration

LT-3100 Satellite Communications System Specifications :

  • LT-3110 Control Unit.
    Weight : 658 g (1.45 lbs).
    Dimensions : 224.0 x 120.0 x 70.0 mm (8.82 x 4.72 x 2.76 in).
    Temperature, operational : -15°C to +55°C (+5°F to +131°F).
    IP rating, dust and water : IP32.
  • LT-3120 Handset Unit
    Weight : 290 g (0.64 lbs).
    Dimensions : 208.8 x 52.8 x 38.2 mm (8.22 x 2.08 x 1.50 in).
    Temperature, operational : -15°C to +55°C (+5°F to +131°F).
    IP rating, dust and water : IP32.
  • LT-3130 Antenna Unit.
    Weight : 687 g (1.51 lbs).
    Dimensions : 151.1 x Ø 149.5 mm (5.95 x Ø 5.89 in).
    Temperature, operational : -25°C to +55°C (-13°F to +131°F).
    IP rating, dust and water : IP67.

In The Box :

  • LT-3110 Control Unit.
  • LT-3120 Handset.
  • LT-3121 Cradle.
  • LT-3130 Antenna Unit.
  • Bracket Mount, Control Unit.
  • Power Cable, 3m.
  • Stainless steel A4 screws for mounting.
  • User & Installation Manual.
  • Unit Test Sheets.

Read more : SAILOR 6280 Automatic Identification System (AIS) For MarineICOM MA-500TR Class B Automatic Identification System (AIS) Transponder; SAILOR 6004 Control Panel Automatic Identification System for Marine; Satellite Communication type Cobham SAILOR 4300 Iridium Certus


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