Satellite PTT

Real-Time Communications Across the Globe

Satellite PTT (Push-To-Talk) is a two-way radio system that uses the Iridium® satellite network. It can be used as a communication tool in remote, isolated areas where there are no mobile phones or landline network infrastructure. Even if terrestrial network infrastructure is rendered unusable by human or natural disasters, Satellite PTT can provide a stable back-up, independent from other networks.

Real-Time Communication Total Global Coverage, Including the Poles Interoperability with Conventional Radios. The Icom SAT100/M are the dedicated satellite push-to-talk (PTT) radios, and are the only PTT radios offering real-time communications at the push of a button between a group of individuals, each of whom can be anywhere on the planet*. The SAT100/M use the Iridium satellite communication network, which covers the entire globe, including both poles.

One-to-Many Global Communications with Just a Push of a Button
Icom’s SAT100 allows users around the world to communicate with a group of PTT radios at the push of a button. To do this, the SAT100 utilizes Iridium satellite network covering the earth including both poles providing wide area global communication anywhere on the planet.

Real-Time Low-Latency Communication
Using 66 Low Earth Orbit (LEO) Iridium satellites, the SAT100 provides low-latency communication, and broader, more reliable network coverage, compared to Geosynchronous Equatorial Orbit (GEO) satellites.

Iridium Network
Icom’s satellite radios are backed by Iridium’s network. These satellites are ready to provide a global communication solution.

Conventional Radios and IP Phones Interconnection
With a VE-PG4 RoIP gateway, the SAT100/M can interconnect with an IP phone, IP, WLAN, IDAS™ digital (Type-D multisite trunking and conventional systems.) and analog transceivers.

LEO Satellites

Icom’s PTT Satellite radios operate on Iridium’s Low Earth Orbit Satellites (LEO). LEO provides low latency communication, broader and more reliable network coverage compared to Geosynchronous Equatorial Orbit Satellites (GEO), which need more variables to operate. GEO satellites are affected by the weather such as rain, clouds and snow. They also do not cover both North and South Poles.

LEO Benefits:

  • Lower latency compared to GEO
  • Stronger signals compared to GEO
  • Portable antenna
  • No need to face south

Characteristics of Iridium LEO Satellites

  • 66 LEO (Low Earth Orbit) satellites circulating the earth at 780 km of altitude
  • Each fast-moving (27000 km/h) satellites completes an orbit around the Earth every 100 minutes; accessible from a radio approx. for 10 minutes and then the next satellite takes over
  • Line of sight to the satellite may be blocked by structure or terrain and the link lost
  • Since it is moving fast, connection will be re-established typically less than a minute.
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