Beijing E&W Technology Co.,Ltd  was established in 1999 and is registered in ZHONG GUAN CUN Haidian DISTRICT, in Beijing China , and Certified by Hi-tech Enterprise in Beijing China.
As the designer and manufacture of Fiber Optical communication products, Our products---EW series Transmitters and Media Converters have been used in ITS, Surveillance Security, Communications, China Petrol, China Power, Coal industry, Prison Administration and other fields.

E&W offers Base Model and Specific Model for complicated applications.
Customized Design/Special Integration of video/audio/data, our engineer provides unique technology for Fiber Optic Applications.
Superior customer support:  Expert sales team and Engineers are always dedicated to service our customers, and provide the products with creative and innovative solutions.

ISO 9001:2000
China National Business Credit System

Design of Frame Mount
1 Function Module ¨CALL Independent Mount
Video Module
Data Module
Audio Module
Ethernet Module
Voice Module for Telephone (VMT)
Voice Module for Intercom (VMI)
2 Particular Characters of Function Module
Video Module----
 Standard 8 Bit Video Digital Encoding (Extra for 10,12 Bit)
 8 MHz Video Bandwidth
 NTSC, PAL, SECAM Compatible
 Surface Mount Technology (SMT)
 Lightning Protect design for Video Connector
Data Module---for RS485/RS422/RS232
 Meets EIA RS-485 ,Manchester or Bi-Phase and ISO/IEC 8482:1993(E) Standards; Low Disabled Supply Current 300 mA Max
 Meets all RS-232D and ITU v.28 Specifications
 Surface Mount Technology (SMT)
 Design for protected data circuits, which are sensitive to electromagnetic interference, avoid destruction result from over-voltage and static discharge 
 Protection against high-energy noise transients.
 Withstand over voltage transients of 400 W peak(typical).
 Outputs sufficient to transmit data up to 250 k bits/s.
Audio Module¡ª
 Complete Stereo DAC System
 I/O Impedance: 600 Ohms (Bal. / Un Bal.)
 Frequency Response: 10 Hz to 100 KHz
 SNR: >90dB (Weighted)@ 1 KHz
 In/Out Level: 3.5v
 Total Harmonic Distort: <0.01% @ 1KHz
 Resolution: 24 Bit
Ethernet Module--
 10/100 Base-T Ethernet Auto-negotiation
 Full Duplex or Half-duplex Supported
 IEEE 802.3 Compliant
 User Selectable MDI/MDI-X
Voice Module for Telephone (VMT)
Voice Module for Intercom (VMI)