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.
- Network Interface LE, article 3130, is the simple and cheaper alternative. It comes in the small black box.
- Standard Network Interface, article 3009, comes in the standard silver 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”.
The larger interface, on the other hand, 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.
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.
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.
- At a large system where the operators have both radios with a fixed talkgroup and radios with full function. In this way the most used talkgroups can all be monitored in parallel.
Two universal interfaces
Operator working with a fixed
channel Airband radio
The operator is connected over IP to the interface, the interface is connected through a 2-wire leased line to the base station/repeater
Operators working with a mix of advanced radios and Tetra radios set to a fixed talk group