Specification :

OB9221DT/ OB9221DR
Two Channel Digital Video
Provide choice of simplex/ duplex audio/ data/ contact closure; 10/ 100M Ethernet, E1, telephone, AIPHONE intercommunication.
It can transmit two channel of high quality composite video, one to six line of duplex audio, or one to four line of duplex data or one to four line of contact closure signal or in any combination over one fiber; And it can be provided choice of one to four 10M/ 100M Ethernet, one to four E1, one to eight line telephone, one to eight line AIPHONE intercommunication signal.

Exceeded the RS250C standard for SNR, DG and DP
Bandwidth reaching 10MHz, SNRe70dB
The video quality is independent of transmission distance in the allowable extent of optical power.
10 bit digital PCM video coding.
Compatible with NTSC, PAL, SECAM.
Range of up to 120Km is possible.
Support OB standard network management system.
Two RJ45 ports with choice of plug-in interfaces in any combination.
24 bit digital audio, 85dB SNR.
RS232, RS422, RS485 or Manchester data.
Data transmission rate DC~ 256kbps.
High-speed optical fiber digital transmission technology.
Super optical dynamic range, 0Km is not saturated.
Power supply, fiber link, data state indication.
SMT
Rack-mount, stand-alone, 19 inches 1U chassis.