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installation & connection
3. Check the specifications for audio input.
• audio codec
- Audio In : G.711 PCM (Bit Rate: 64kbps / Sampling Frequency: 8kHz), G.726
ADPCM (Bit Rate: 16Kbps, 24Kbps, 32Kbps, 40Kbps / Sampling Frequency: 8kHz)
- Audio Out : G.711 PCM (Bit Rate: 64kbps / Sampling Frequency: 8kHz)
• full duplex audio
• audio in : Mono signal line input (Max.2.4 Vpp)
• audio out : Mono signal line output (Max.2.4 Vpp)
• Line out impedance : 600Ω
connecting to the i/o port box
Connect the Alarm I/O signal to the corresponding port of the rear port box.
• ALARM IN : Used to connect the alarm input sensor or external day/night sensor.
• ALARM OUT : Used to connect the alarm output signal.
• GND : Used for earth-grounding.
• RS-485+ : Communication port for RS-485 receiver (+).
• RS-485- : Communication port for RS-485 receiver (–).
24_ installation & connection
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