Development and manufacture of automation systems

Phone recording and Audio surveillance systems

Automation of enterprises, hardware and software development  

ACS-USB v.1.0 Audio surveillance controller [ Price: 270$ ]


ACS-USB v.1.0 USB controller of telephone lines (recording of telephone conversations) and microphones (Audio surveillance) is translational unit, performing translation of audio channels in digital format to PC USB port, for recording of voice channels on PC hard disk. The controller is designed for use in automated control system of staff activities in organizations (documentation of official information in organizational control purposes) and is not designed for secret / hidden listening / recording of voice channels and private use.



Hardware characteristics:

(wiring diagram)
  • Power supply: - 5VDC from USB
  • Input channels: - 3 universal (telephone line/microphone)
  • PC interface: - USB 1.1/2.0
  • Sampling rate: - 8 KHz
  • ADC resolution: - 10 bit
  • Hardware compression: - none
  • Input impedance (Microphone): 10 KOhm
  • Input impedance (telephone line): 390 KOhm
  • Telephone line voltage: 20-70 VDC
  • Power supply current: 60 mA
  • Warning signal: 1400 Hz, duration 400 ms, period 15 s, level ~19-21 dB
  • Temperature range: from +10 to +40В°C

Software characteristics:


  • Interaction with PBX: PBX service
  • Compression: - MPEG Layer 3 (MP3)
  • Sampling rate: - 8 KHz
  • Channels: - 1 (mono)
  • Sampling rate: 16 kbit/sec
  • PS: Required volume of disk space calculation should be based on a 2 kb/s. It is recommended to connect the PC to the earth ground.

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