900 Family of Communication Interfaces
An audio compressor ensures optimum levels for both transmit and receive. Up to three (3) handsets or consoles can plug into the 920 interface through 6 way US modular connectors.
A single plug pack can power the interface and its peripherals, with handsets and consoles operated up to 100 metres away.
An optional "Base Busy" sub-audible decoder gives local indication of the radio channel being occupied. The optional 920B operates in conjunction with the 925E fitted in the 925LKI. Multiple 920s can be paralleled at the two wire point.
A four wire version available for special installations using two leased lines or direct connection to bearers. This model is known as the 920T/4W and uses tone signalling.
The 935 Local Radio Interface allows direct connection of the 960 family of peripherals to a base station transceiver.
Communication applications where the operators are within 100 metres of the radio equipment are covered by this unit. Up to three peripherals can plug directly into the 935 with power derived from the radio. Radio level adjustment controls are provided to optimise audio quality to and from the handsets or consoles.
The 925 Line Keying Interface provides isolation and control from two-wire leased lines to radio base stations.
Two models are available, the "T" version which responds to tone keying and the "D" version, which responds to DC voltage to produce the PTT signal. The unit comes complete with plug and lead for the base station. Power for the 925 is derived from the base station supply. Base Busy Indication on the handset (or console), using sub-audible tones, is available using the 925E module for community base operation or in conjunction with the Omnitronics 950 Multiconsole Multi-radio System (Radio Management System). This works in conjunction with the 920RCI and 920B Base Busy Decoder. All versions are Austel approved (Permit No A90/19/0341).
The 934 Peripheral Interface enables the connection of Omnitronics 960 handsets, consoles or the 950 Radio Management System to 2 wire simplex (plus control line) devices such as the Omnitronics 9412 Audio Management Unit or 619E 4 wire 6 way Audio Bridge.