Smart Logger BOX STC-H730 - Efficient Autonomous Voice Recording Device

The device is designed for automatic registration and storage of audio data,
received from various sources of audio signal:
- analogue subscriber telephone line;
- line output of audio equipment;
- two-wire microphone with preamplifier and phantom power supply
12 or 60 V;
- digital subscriber telephone line;
- digital stream E1 (EDSS1, R2).