The NTZ spare telephone switch panel is intended for emergency operation on telephone circuits important for managing railroad transport. Up to 20 telephone circuits can be connected to the spare telephone switch panel. The unit has an optic and an acoustic indication of incoming calls.

The public announcement switch board RU6/100 (further on as the RU) is a device intended for sound distribution at railroad stations, bus stations and underground stations. It is suitable for use at exhibitions, sport stadiums and halls. It is also suitable for use as a local public announcement system in villages and smaller towns

The small telephone switch panel (further on as switch panel) is an end-user device for controlling up to 12 telephone circuits and a voice switchboard. Its main field of use is in the operative managing of railroad transport in railroad stations and on sidings. After pushing a line button on the upper slanting panel, the telephone unit is connected to the relevant telephone ci...

The SODR switch panel control set is intended for controlling a relay telephone switch panel which is used for the operative management of railroad transport and for controlling an announcement switchboard. The control set can operate up to 30 telephone circuits and 6 branches within one announcement switchboard.

The control set located in the railyard is used as a call point for the reverse announcement system. The SOZ set is compatible with all announcement systems enabling reverse announcements.

The SPZN connection box with spare switch panel is mainly used as a connection box for SZM small telephone switch panels. Further on it is intended for securing emergency operation on telephone circuits. The SPZN can also be used as a simple end-user device for managing 10 telephone circuits.

The TONDIS dispatcher telephone device with the centralized selection option a maximum of 32 extensions can join one call. Every extension can be assigned to max 8 groups (< 32).

The TONZED (TONe reverse request) is basically a dispatcher half-duplex system placed in the railyard and it is used as a call point for the reverse announcement system. The TONZED set is a box which is to be mounted on a post. The TONZED set is compatible with all announcement switchboards having a reverse announcement system function.