General description
- TONZED is a dispatcher half-duplex system located in the railyard
- it is used as a call point for the reverse announcement system
- constructed as a box for mounting onto post
- possibility of measuring line losses
- use of old cabling during reconstructions
- possibility of local SUZ power supply
- use of DTMF dialing
Basic technical description
- the SRZ control unit contains a sheetmetal box with a vertical work panel containing electronics
- the SUZ subscriber extension is cast and contains a microphone, speaker, printed circuit panels with electric circuits
- the SRZ are controlled via a connected automatic telephone device or a connected telephone switch panel
- the SRZ and the SUZ are quiescently connected to the mains
- incoming calls are connected to the loudspeaker box in standard mode
- after picking up the microphone and entering a two-digit number the operating person can immediately speak
- local lines and trunk cables are used as a transfer medium
Compatibility
- announcement switchboards having a reverse announcement system function
