LT-3100 System

LT-3100 Satellite Communications System

Designed and built for the demanding and rough environment at sea.


  • Voice, SMS, Data, and Vessel tracking
  • 2.4 kbps and 9.6 kbps compressed data
  • Programmable softkeys for e.g. Emergency Service
  • Single antenna cable solution (up to 500 m)
  • High-performance GNSS/GPS receiver
  • High quality microphone, speaker, and equalizer for improved audio performance
  • Bluetooth interface supporting voice, SMS, and data
  • Voice prompt audio feedback
  • Large 4.3” TFT display supporting day and night modes
  • 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
  • Connectivity of Smartphones, Softphones, and Apps

Product Description

The LT-3100 Satellite Communications System is a maritime satellite communication product 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.

The LT-3100 system has voice and data capabilities with 100% global coverage provided by the Iridium® Communications Network. The LT-3100 system consists of a control unit, antenna unit, handset and cradle. A single coaxial cable 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 unit 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 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.

Product Features


Installation Options

System Configuration

Technical Specifications

LT-3100 Satellite Communications System
Certification & standards Maritime CE, FCC, IC, RCM, RoHS 2, Iridium®
Vibration, operational IEC 60945 (sine) & proprietary Maritime Random profile
Vibration, survival Proprietary Maritime Random profile
Vibration, shock Proprietary Maritime profile (20 g, 11 ms)
Power consumption: operating mode, max 37 W
Power consumption: standby mode, max 21 W
Power consumption: sleep mode, max 0.08 W
Compass Safe Distance, std. 0.85 m (2.8 ft)
Compass Safe Distance, steer. 0.65 m (2.1 ft)
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 IP 32
Interfaces Ethernet, auxiliary, DC input, chassis ground Antenna Unit (N conn.), Handset, Bluetooth, SIM card
Input voltage 10 - 32 VDC
LT-3120 Handset
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
Interfaces Control Unit (N conn.)
Antenna communication cable Coaxial cable, up to 500 m (1500 ft)
Warranty 2 year
Maintenance None
In the Box
LT-3110 Control Unit P/N: 51-100987
LT-3120 Handset P/N: 51-100988
LT-3121 Cradle P/N: 51-101181
LT-3130 Antenna Unit P/N: 51-100989
Bracket Mount, Control Unit P/N: 91-100771
Power Cable, 3m P/N: 91-100767
User & Installation Manual P/N: 95-100765
Flush Mount, Control Unit P/N: 91-100772
Bracket Mount (1.5” to 2.5” tube), Antenna Unit P/N: 91-100773
Pole Mount (1.5” tube), Antenna Unit P/N: 91-100774
Aux Cable, 3m P/N: 91-100768
Coaxial Cable Ø4.9mm, 10m and 25m
Coaxial Cable Ø10.3mm, 10m, 25m, and 50m
Crimping Tool for Coaxial Cable Ø4.9mm and Ø10.3mm