I. Features 1) alloy casing wall or plug-in for centralized management 2U or 4U rack-2) automatically compatible with PAL, NTSC, SECAM multiple video formats 3) All interface uses three anti-static, lightning protection 4 ) wide optical dynamic range and advanced adaptive technology, transmission distance up to 120KM 5) surface mount devices to ensure that products are small, high stability, high reliability 6) Support for advanced SNMP network management standards, remote video network 7) very low electromagnetic interference (EMI), radio frequency interference (RFI) and total ground loop interference 8) rich LED lights, diagnostic indication 9) Plug and Play, hot swappable 10) small size, low power consumption anti-interference ability, high fidelity, etc. 11) industrial wide temperature range (-40 ℃ ~ + 85 ℃), to adapt to more environment 12) in line with IEEE802.3u, 100Base-TX and 100Base-FX standard 13) Built 288KB cache, store and forward support 2046Bytes, infinite packet through mode 14) Built-in lightning protection circuit, can significantly reduce the damage caused by lightning induction Second, the application range of 1) urban traffic monitoring system, highway security, charging system 2) Public Security , safe city monitoring system 3) building, campus monitoring network, standardized college entrance test center monitoring 4) industrial monitoring (airport, chemical, iron and steel, petroleum, railways, water, mining, etc.), Stadium (live video, audio transmission) 5) Military monitoring (warehouses, border guards, defense, prisons, etc.) 6) fiber-optic broadband access network, transmission network HD camera signals. Third, the technical parameters of a video Optical. Video Parameters 1) standard: compatible PAL, NTSC, SECAM variety of standard 2) Impedance: 75ohm (unbalanced) 3) signal amplitude: 1.0Vp-p (standard value) 4) Input / output voltage range: 0.6 ~ 2.0 Vp- p 5) Definition:> 600TV Lines 6) Differential Gain: <± 2% type 7) Differential phase: 60dB 9) Physical Interface: BNC 2. Data parameters (reverse data, forward data, two-way data) 1) Format: RS232 / 4S422 / RS485 / Manchester / BIPHISE (optional) 2) Rate: 0 ~ 200Kbps 3) BER: 1 * 10-9 4) Physical interface: standard plug-in terminal 3. Switch parameters (forward alarm, reverse alarm, two-way alarm) 1) Input: Compatible with active and passive alarm, switch input 2) Output: passive normally open / normally closed / active output 3) Physical interface: standard pluggable terminal 4. Ethernet parameters: 1) mode: full / half duplex adaptive 2) Rate: 10M / 100M adaptive 3) Physical Interface: RJ-45 5. Audio parameters (forward audio, reverse audio, two-way audio) 1) Input / Output Impedance: 600Ω unbalanced 2) Maximum Input / Output Level: 3.0Vp-p 3) signal to noise ratio (S / N): ≥70dB 4) Frequency Response: 10 Hz ~ 20kHz @ ± 3dB 5) Physical interface: standard pluggable terminal 6. Optical parameters: 1) Wavelength: 850 ~ 1610nm 2) Transmission mode: Single-mode / multimode 3) optical power: ≥-12 dB 4) Receiving sensitivity: ≤-30 dBm 5) typical optical dynamic range: 15 dB, 25 dB , 30dB 6) physical interface: FC / SC / ST / LC 7. Operating parameters 1) Working temperature: -20 ~ 70 ℃ 2) Storage Temperature: -20 ~ 70 ℃ 3) Relative humidity: 0 to 95% (non-condensing)