Operation Manual

installation & connection
24_ 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 (–).