l OB9931D/OB9931D can transmit one channel of simplex video, one to two channel of simplex audio and one to four channel of duplex control data signal over one or two E1 channel
l Single E1 channel transmits OB9931D
l Two E1 channels transmit OB9932D
l Support OB standard network management system
l Support MPEG-1、MPEG-2 ML@MP
l Adjustable system bit stream 1.5~4Mbps
l Code-speed adaptive decoder
l Low end-to-end delay（≤150 ms）
l One RS232/422 serial channel
l Surface mount technology (SMT)
l Rack-mount/stand-alone/19" 1U enclosure.
l Power supply, link, data status indication
l Expressway monitoring /communication system
l City intelligent traffic monitoring/communication system
l Electric power security monitoring system
l Water conservancy security monitoring system
l Security monitoring system in large-scale enterprises
l Military communication
Video
Code format：MPEG-2
Compatible format：PAL 25fps, NTSC 30fps
Resolution：D1, Half D1, CIF
Connector：BNC（75Ω）
Voltage：1Vp-p
Audio
Code format：MPEG-1 Laryer2
Sampling rate：32 / 44.1 / 48 KHz
Connector：BNC（unbalanced, 30kΩ）
Voltage：2Vp-p
Low-speed data
Data format：RS-232/422
Bit rate：DC – 115.2Kbps
Connector：RJ45
Electric Features
Power supply：
OB9931/32D T/R（X）-A
Requirement：24A@6VDC
Sources：plug-in frame backplane，96PIN interface
OB9931/32D T/R（X）-B
Requirement：4A@6VDC
Sources：power adapter，5 pin self-lock interface
OB9931/32D T/R（X）-C
Requirement：220V AC 0.25A
Sources：mains supply
Power consumption：6W
Mechanism Features
OB9931/32DT/R（X）-A
Rack-mount，OB18 box
Dimension：442X222X178 Weight：3.5Kg
Material：section aluminum Color：silver gray
OB9931/32DT/R（X）-B
Stand-alone，OB2A box
Dimension：160X202 X45 Weight：1Kg
Material：section aluminum Color：silver gray
OB9931/32DT/R（X）-C
Standard，OB19A/B box
Dimension：482X250 X45,482X250X88 Weight：2Kg
Material：section aluminum
Color：silver gray
E1
Standard：ITU-T G.703
Rate：2.048Mbps（single channel）
Interface code：HDB3
Connector：BNC（unbalanced, 75Ω） or RJ45（balanced, 120Ω）
System parameter
MTBF（Mean Time Between Failures）：>100 thousand hours
Environment
Operating temperature：－40℃～74℃
Storage temperature：－55℃～85℃
Humidity ：0~95% non-condensing
Electromagnetism compatibility
Accord with GJB151A-97、SC
Operating state indication
OB9931/32DT/DR
DVALID ：data valid indication
SDATA：serial data indication
CH1R/CH2R：E1 channel indication
INIT：initialization indication
POWER：power indication
Network management system function
OB9931/32DT：
Encoder state detection；video/audio/data
In-out state detection
OB9931/32DR：
Decoder state detection；video/audio/data
In-out state detection
Audio channel/data channel configuration
In production model“（X）”refers to the configuration of audio channel, use XA as the expression.
e.g.“（2A）” refers to configuring two line of audio channel.
OB9931/32DT(X)：encoder，reside in front.
OB9931/32DR(X)：decoder，reside in center.
X：represents audio channel and low-speed data channel configuration
e.g.： 1 channel digital video＋2 channel audio＋1 channel control data OB9931/32D(2A)
1 channel digital video＋1 channel control data OB9931/32D
