Converter I2C-RS conforms the outputs of radio stations of Tetrapol system for recording on ReDat Recording System. It is connected to the connector of CCP control box; the output is analogue signal of audio communication line and serial line with signalling data.
Works as a supplement for visual and acoustic control of the current condition of the device. It provides signalling of the lines status and acoustic noticing of the attendant of a power cut and error notices.
For time precision of the system and thus of the time of the received records, the signal receiver of the atomic clock Braunschweig on long waves on the frequency of 77kHz is used as a supplement of the recording system.
To work correctly, the DCF-77 receiver must be placed at least 1 metre away from computers, monitors and other appliances that radiate electromagnetic waves. Correct functioning is indicated by an LED on the receiver flashing in regular one-second intervals.
Generator of control tone, after evaluation of the voltage on a line or an input, operates emitting a control tone 2280 Hz for the purposes of line connection control to the ReDat3 Recording Unit. The control tone is emitted at the time when there is no call on the line. The device is designed especially for use with dispatch system used by the Czech Railways.
Phone line separator is a high input impedance device used for galvanic separation and non-irruptive monitoring of controlled analogue telephone lines. It may serve for the transmission of audio signals (including the voltage signalling) from the monitored line at a distance of approximately 50m.
Buffer amplifier OZS is designed for high-impedance galvanic separation of Up0/ISDN S0. It is used e.g. for signal transmitting from Up0/S0 interface to ReDat3 Recording Unit to a long distance (up to 500 m). The construction and the input impedance prevent troublesome effects on transmitting.
Buffer amplifier OZS is designed for high-impedance galvanic separation of both directions of G.703 (E1, 2Mbit/s) trunks. The construction and the input impedance prevent troublesome effects on transmitting. The amplifier is EMC approved. Regulable fade-in allows setting the size of the output signal for further processing or for transmitting to a long distance.
ISDN filter is designed for connecting ISDN line via inductor, which prevents infiltration of disturbing VF signal. In a plastic box 68 x 48,5 x 26 mm, with attachment holds there are two identical inductors. Input and output of the lines are connected into screw connectors. The use is suitable for ISDN lines connection on interfaces S0 and Up0.
Detector of line connection by RETIA enables a diagnostics of audio signal connection. It is used if it is not possible by other way to diagnose whether the line status is connected or disconnected. For example: the audio-outputs of radio stations - If the DC voltage is not present, you cannot detect the status of connection line.