Connecting radios all over the world

PoC Communication

PoC or “Push To Talk over Cellular” is becoming more and more popular. Using the 4G networks for transmissions instead of dedicated two way radio networks has its advantages.
Being able to use your smartphone as a “PTT radio” is of course practical.


Mimer SoftRadio

Using PoC

Most smart phones can be equipped with an application that gives talk group communication using the 4G/LTE network as the carrier.

There are also dedicated “PoC-radio” terminals that looks like a portable or mobile radio but are infact a PoC terminal.

For those who need to combine this cellular talkgroup with their existing two way radio system, we have the solutions.

You will need a Mimer Network Interface connected to your radio system and to the Internet. A connection is then done to the server at the PoC service provider.

We have partnered with the PoC service provider “GroupTalk” and have good experience with their service.

Please note that this smart phone connection admits audio and PTT. There are no other remote control functions, like channel change, available on the radio from the smart phone.

Suitable Network Interface is 3130.

GroupTalk is a subscription service that you set up through

Please note that the GroupTalk connection works in combination with all other SoftRadio system functions. In this way you can build your advanced dispatch system with voice recording and other functions, plus the PoC functionality.

Alternative solution 1

Instead of connecting to the PoC systems server you can set up a PoC unit together with an LE-Interface and then do a cross patch at the SoftRadio operator. In this way the radio talk group and the PoC talkgroup work as one.

See drawings below and read more on this page about Icom. and on this page about other types of PoC radios.

Alternative solution 2

You can bridge your radio system to your PoC/WiFi system through the use of Mimer X-Link.

X-Link connects any two radios together, building a permanent patch between systems.

Read more about X-Link on this page.

Examples of use:

  • When some users are far away from the radio coverage, they can still be connected.
  • When some users can´t carry a two way radio but have a smart phone.
  • When radio users and phone users shall be able to talk in the same talk group.
  • When a dispatcher goes away from his desk, he can still be active through his phone.

Typical users:

  • Airplane pilots when standing with the plane at the gate, so that they can be part of the radio conversation going on around the airplane.
  • Harbour personel that needs to listen in on what is going on, on the marine radio channels in the harbour.
  • Security companies that have only a few guards in an area and it is too expensive to set up a separate radio base station.
  • Transport companies that sometimes have rides that take them outside the normal radio coverage.
Network Interface LE

Network Interface LE 3130

Cable Kit for Icom Airband radios

Cable Kit to the radio of your choice

Use together with SoftRadio

Customers that already have a Network Interface and a PC operator with SoftRadio software, can connect GroupTalk in parallel, using the same network Interface.

The GroupTalk server will connect over TCP in the same way as a remote operator would do in the SoftRadio system. This means that in some cases a Mimer RadioServer is needed.

Supported phones:

  • Android
  • iPhone
  • iPad
SmartPhone use
GroupTalk Application on Smart Phone

System examples:

GroupTalk users connected to a radio system through a Mimer Network Interface LE.

GroupTalk users connected to the talk group in the radio system through a network interface and a fixed radio.

GroupTalk users connected to a SoftRadio system with dispatchers.

GroupTalk users connected to a radio system in parallel with PC operators using SoftRadio.

SoftRadio at SAS

GroupTalk is used in combination with two way radio on SAS aircrafts around Scandinavia.
More reading here.

Motorola TLK100 PoC/WiFi radio connected to an LE Interface

Motorola Wave TLK100 PoC/WiFi radio connected to an LE Interface.

Kirisun M50 PoC/WiFi radio connected to an LE Interface

Kirisun M50 PoC/WiFi radio connected to an LE Interface.

A PoC/WiFi radio and a standard radio remote controlled by to three operators

PoC units can be combined with standard radio units in the same SoftRadio system.

The dispatcher can then cross patch calls between radio and PoC.

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