OB Telecom, founded in Hangzhou, China, reached its 10-year anniversary in 2010. Founded in 2000 from the Optical Fiber Communication Technology Research Laboratory in Zhejiang province, the company offers optical fiber transmission for digital video, data and Ethernet.
OB Telecom, founded in Hangzhou, China, reached its 10-year anniversary in 2010. Founded in 2000 from the Optical Fiber Communication Technology Research Laboratory in Zhejiang province, the company offers optical fiber transmission for digital video, data and Ethernet.
In 2000, a group of experts in digital video communications gathered to develop and produce digital video solutions. In its first decade, OB Telecom reached several product development milestones, such as Ethernet and telephone signal support, along with digitally encoded cascade video transmission. Other breakthroughs include the first-generation VAR digital video integrated multiservice optical transmission and switching systems, the VAE digital video collection transmission as well as the third-generation VAR.
As a technology-driven company, OB Telecom plans to expand not only in the Chinese market but overseas as well. According to OB Telecom's management, they care about long-term value and will not compromise on quality. Furthermore, the company will make brand recognition a strategic goal, increasing its market reach in the future.
OB Telecom's products have been deployed for many different applications in China, such as financial institutions, highways, city surveillance projects, power plants, ports and airports.
Stable Transmission
The OB9252D fiber-optic transceiver supports eight-channel video and multichannel data transmission over one single mode fiber. Using OB Telecom's network management system, the transceivers are universally compatible with major surveillance cameras. A wide range of protocols are supported, such as full-duplex RS-232, RS-422 and two-wire or four-wire RS-485 data interfaces. They are also compatible with NTSC, PAL and SECAM. The transceivers are terminated with default FC connectors.
The transceivers operate over 9-nanometer or 125-nanometer core single-mode optical fiber at a nominal wavelength of 1310-nanometer or 1550-nanometer. They can also transmit over 62.5-nanometer or 125-nanometer core multimode optical fiber at a nominal wavelength of 1310-nanometer. They communicate eight channels of quality digital video in a pointto- point configuration. The transceivers support simultaneous transmission of one channel of bidirectional data and one-way 10 Base-T or 100 Base-TX Ethernet data. OB Telecom's solutions combine advanced engineering with high quality.
By utilizing eight-bit digital encoding, decoding and digital filtering, the OB9252D series excel in video transmission performance. The transceivers exceed EIA RS-250C requirements for signal-to-noise ratio (S/N), differential gain (DG) and differential phase (DP). They enable high data transmission rates of up to 115.2 kbps with low power consumption through RJ-45 ports.
Stable Operating Performance
The OB9252D system's operating temperature ranges from -30 to 75 degrees Celsius. Its storage temperature can withstand climates from -40 to 85 degrees Celsius, making it well-suited for environmentally harsh applications such as traffic monitoring, city surveillance and critical infrastructure. It is built to run in environments with up to 95 percent relative humidity, providing a noncondensing operating environment, for reliable use whether the system heats up during operation or cools down when the power goes off.
Friendly Design and Installation
Each transceiver incorporates an LED indicator to monitor system operation and status. Its plug-and-play design enables easy installation, with no electrical or manual adjustments required. The transceiver can work as stand-alone units, as well as in a compact rack-mount configuration or 19-inch 1U rack-mount enclosure.
Testing Performance
The transceivers show high signal reception sensitivity. Its output power measured -6.08 decibels with a power meter, while input power was -27.03 decibels, resulting in an optical power budget of 20.95 decibels.
DG, DP and bandwidth were tested with a monitor, oscilloscope, VM700T video audio analyzer and TSG95 signal generator. The results showed that when the transmitter and receiver were connected over 20 kilometers, their S/ N ratio was higher than the maximum possible S/N ratio of 56 decibels. This means OB Telecom's solutions produce less background noise (see Table 1). DG and DP were stable during testing, as sharp and saturated images were delivered without distortion. The DG was less than 2 percent and DP was less than 1 degree, as seen in Table 2.
Bandwidth range was between 5 and 8 Hertz. When the equipment was tested at 5.8 meters, the frequency varied between -2 and 2 decibels, as seen in Table 3.
Success Story: 2008 Olympic Games
The OB Telecom fiber transmission was deployed as part of a turnkey security solution for the Olympic Games. Multiple fiber-optic transceivers were selected, as well as industrial Ethernet switches for the Bird's Nest, Water Cube, National Stadium, Beijing Shooting Stadium, Olympic Water Park and the Qingdao International Sailboat Center, ensuring high-quality transmission.
The transmission equipment supported optical transmission of analog video and data, audio, contact closure and Ethernet over fiber. Their rugged and sturdy design was capable of handling harsh environments. The system incorporated OB Telecom's network management system, which monitored the system's status and performance, delivered alters, and collected operation information on each device.