Connecting radios all over the world

The Network Interfaces

The purpose of the Network Interface is to be a bridge between the radio and the IP network. It transforms audio and signalling from analogue to digital and back again.

The Network Interface has a very flexible design so the I/O signals can be configured to fit almost any radio on the market, both Mobile Radios and Base Stations.

The Network Interface has connections for Audio input and output, I/O control signals like Squelch, PTT, Alarm, Off-hook, PEI etc and Data signals to and from a control head.

The network connection is a standard 10/100 base-T Ethernet connection. Both TCP and UDP network protocols are available simultaneously depending on the system configuration. This allows a flexible approach for designing the most optimum network based system.

The interface has a design that fits most standard uses with none or very small modifications. For the radios that Mimer SoftRadio supports with Virtual Control Heads there are versions available where all setups and adjustments are already preconfigured.

There are also special Network Interfaces to be used with phone lines or intercom instead of radios, and also interfaces for Mimer SoftLine.

The Network Interface runs on 12VDC just as most radios and is therefore easy to power from the same source as the radio, and to feed with backup power. If power is lost and restored, the Network Interface will restart itself in a matter of seconds when the power comes back.

Specifications for the Standard Network Interface

Specification for the standard version of the Mimer Network Interface
You will find a complete description on the Download Page.

Mechanical
Size 120 x 78 x 44mm
Weight <300g (typ. 260g)
Power supply 8-28Volt / 250mA
Temp range -10 – +50 °C
Connectors RJ45 for Ethernet
D-sub for audio, power, I/O, data and auxiliary I/O
Audio
Input (from radio speaker output) 0.7-13Vpp (0.25-4.5Vrms)
Output (to radio microphone input) 0-1.1Vpp
I/O
3 inputs On= 2.5-30V / Off= 0-0.8V, 47kohm impedance to ground
3 open collector outputs Max 30V / Max 10mA. Optional reverse-current protected 5.6k pull-up to +5V
Data I/O for radio control RS232, TTL, USB and other manufacturer-specific protocols
Aux data port* RS232 compatible inputs and outputs

Note:  The I/O and data ports are used to interface with different radio types, depending on type of radio, free ports may be available for auxiliary use.

There are also special versions with other types of connectors and ports.

Specifications for the Network Interface LE

There is also an entry level interface with less functions aimed at customers that need only to remote control audio and PTT on their radios.

This is perfect for customers running simple radios with only one channel and open voice traffic, for example taxi companies or an Airband radio at an airport.

The “LE” interface has no functions for virtual control heads, no functions for I/O ports, can not connect to land lines and cannot be upgraded with option boards.

The price is of course matched to the slimmed functionality.

Mechanically the interface is lower than the standard model, 30mm.

You remote control with  the same software “Mimer SoftRadio”, and you can mix and match standard interfaces with “LE” interfaces in the same system.

The same functions regarding local (UDP) or remote (TCP) connection applies as with the standard interface.

Mimer SoftRadio

Network Interfaces

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