Connecting radios all over the world

Interfaces for generic types of radios

In parallel with our line of interfaces that remote control the radios more advanced functionality we also have a line of interfaces, that will only handle the audio and the PTT. On the other hand this is often enough for many users.

These generic interfaces can be used both for single channel analogue radios or for single talkgroup radios in Tetra DMR or PoC systems.

Connection is done through E&M signalling on the radio, plus PTT. There is no need for a Squelch output from the radio. The interface detects the audio level.

Like all the other interfaces you can connect through all types of IP; LAN, WAN, the Internet, 4G, Satellite etc.

You use the same dispatcher software, Mimer SoftRadio, as for all other interfaces and you can mix and match with the other systems in the Mimer SoftRadio family.

As with all other SoftRadio you can operate several radios from one dispatcher and each radio can be operated from several dispatchers. Each dispatcher can also use other types of radios in a mix.

Network Interface LE
Mimer Network Interface

Network Interface LE

This is the simple and cheaper alternative. It is as standard delivered in the small black box.

The small LE interface, is fixed for connection to the audio levels used by the microphone and the speaker on a standard fixed mobile radio or base station. It can only handle simplex audio. Neither hardware or firmware can handle any “extras”.

Optionaly delivered in the larger “silver box”.

Network Interface (standard)

This is the more intelligent box with more alternatives. It is alwyas delivered in the larger “silver box”.

The standard interface can be fitted with extra equipment to handle special signaling, for example DSC or CCIR, it can also be fitted with transformers to handle audio at line levels, typical 600Ohm/-10dB. And it can also be programmed for duplex audio.

Interface brackets

Mounting

On the “silver box” there are two threaded holes, M4, on the front panel that can be used for panel mounting.

For both boxes there are also mounting brackets available.

Examples of use:

  • Local use when several dispatchers wants to share one radio.
  • Remote use where a dispatcher at one location wants to talk to radio users at different locations, for example a taxi company with base stations in several towns.
  • CrossPatch between one radio system and other systems, like analogue, IDAS, DMR, Tetra or MPT, when the radios are at different sites.
  • At a large system where the operators have both radios with a fixed talkgroup and radios with full function. With the universal interfaces the most used talkgroups can all be monitored in parallel.
  • Connection to PA/PAGA systems.
Mimer SoftRadio
Network Interfaces, Standard and LE version

Two universal interfaces

Connection & Configuration Examples

Below are some different configurations possible with the universal interfaces. More alternatives are possible so please ask.

(The radios in the pictures are just examples to illustrate a fixed radio and a base station)

The most basic connection, the LE interface connected to a fixed radio through microphone and speaker connections.

The most basic connection, the LE interface connected to a fixed radio through microphone and speaker connections.

The LE interface connected to a PA or PAGA system through microphone and speaker connections.

Same type of connection as to the left, but made to a PA or PAGA system.

The standard interface connected to a fixed radio through microphone and speaker connections. Room inside the interface for extra cards like decoder for 5-Tone or DSC.

The standard interface connected to a fixed radio through microphone and speaker connections. Room inside the interface for extra cards like decoder for 5-Tone or DSC.

Interface with built in line transformers connected to a base station through 2-wire. PTT by tone keying or DC current over the line.

Interface with built in line transformers connected to a base station through 2-wire. PTT by tone keying or DC current over the line.

Interface with built in line transformers connected to a base station through 4-wire. PTT by tone keying or DC current over the Tx line.

Interface with built in line transformers connected to a base station through 4-wire. PTT by tone keying or DC current over the Tx line.

Interface with built in line transformers connected to a PA or PAGA system through 4-wire. PTT by tone keying or DC current over the Tx line.

Interface with built in line transformers connected to a PA or PAGA system through 4-wire. PTT by tone keying or DC current over the Tx line.

Interface with built in line transformers connected to a base station through 6-wire. PTT on separate connection.

Interface with built in line transformers connected to a base station through 6-wire. PTT on separate connection.

Interface with built in line transformers connected to a PA or PAGA system through 6-wire. PTT on separate connection.

Interface with built in line transformers connected to a PA or PAGA system through 6-wire. PTT on separate connection.

System Examples

Operator working with a fixed channel airband radio

Operator working with a fixed
channel Airband radio

Base station connected with 2-wire to an operator over IP

The operator is connected over IP to the interface, the interface is connected through a 2-wire leased line to the base station/repeater

Local and remote operators working with both Tetra and Marine radios. Some Tetras with Virtual Control Head, some with a single fixed talk group

Operators working with a mix of advanced radios and Tetra radios set to a fixed talk group

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