- Auto Lighting System[2]
- Emergency Tools[1]
- Power Distribution Equipment[1]
- Energy Saving & Fluorescent[4]
- Ceiling Lights[4]
- Other Lights & Lighting Products[10]
- Speed Measuring Instruments[10]
- Alarm[10]
- Other Police & Military Supplies[1]
- Traffic Light[1]
- Traffic Signal[2]
- Other Telecommunications Products[4]
- Aviation Parts[10]
- Other Marine Supplies[1]
- Contact Person : Mr. Sun Micheal
- Company Name : Shanghai Nanhua Electronics Co., Ltd.
- Tel : 86-21-39126868
- Fax : 86-21-39126868--808
- Address : Shanghai,Shanghai,Building 9, No 1755, Wenbei Rd, Jiading District, Shanghai, China
- Country/Region : China
- Zip : 201802
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Digital Intercom System
This is Nanhua Electronics' new generation industrial intercom system product. For environments that need independent communication networks, or have heavy EMI, such as ports, ships, power and chemical plants, steel mills, offshore platforms, cranes, tunnels and coalmines.DSP high speed data processing and voice compressing coding techniques help solve voice quality problems caused electro-magnetic interference, environment noise, cable distance and multiple phone stations.DT digital broadcasting intercom’s power supply and communication share the same 2-wire cable. Non-polarity cable connection type, uses central power supply, plug and play, commissioning free, no expertise needed on installation & after-service. All those features can significantly reduce cabling material and installation cost.
SpecificationsAudio format | Lineal PCM |
Audio input threshold voltage | 15dB (power supply voltage, reduce environment interference), auto switching off audio input if the audio input is lower than this threshold voltage in 2 minutes after unhook, and will go to sleeping mode automatically |
Carrier format | OFDM |
Ambient temperature | -30°c - +70°c |
Relative humidity | 10% - 90% no condensation |
Working voltage | 24VDC ± 10% |
Power supply | Central power supply from power supply box |
- | Main power supply 110V AC±10% or 220V AC±10% |
- | Back up power supply 24VDC / 7AH |
- | Main and back up power supply switching time < 500ms |
Communication distance | 800 meters |
System netting numbers | Max 20 stations (with external power supplies) |
Running mode | Long-term |
DT Digital Intercom System