Feature Communications & Networking Ensuring real time video surveillance
IP video surveillance is a fast growing market, whether it be in the form of airport security systems or traffic monitoring and city surveillance systems. Therefore, the quality of the network determines the reliability and quality of video delivery. Here Korenix, provider of industrial networking and computing solutions, explain how its solutions have been put to good use in a city video surveillance project in Tel Aviv, Israel
T
he Tel Aviv project was primar- ily designed to enhance the safety and security of the city’s residents and to safeguard criti- cal infrastructure. Earlier this year high definition mega-pixel cameras were installed in several key loca- tions throughout the city such as traf- fic intersections and public parks. In order for security personnel to moni- tor video coverage from a remote location in real time, and to provide immediate responses when needed, the project required a highly robust solution with a high bandwidth.
Jet power
JetNet 5310G PoE (Power over Ethernet) switches from Korenix were selected and deployed across the city in order to optimise the transfer of high resolution video images from megapixel PTZ cameras back to the city control centre that is responsible for monitoring city security. Up to eight cameras are installed in each location which transmit video images across distances of up to five kilome- tres at high capacity 50Mbps, with zero latency. The JetNet 5310G switches are successfully providing a reliable surveillance network. Each JetNet 5310G switch delivers 30W of power with up to eight high power applications in PoE enabled devices, such as IP cameras and multi- media displays, which are accessed through the eight PoE ports, while simultaneously collecting the captured video streams and other data with supe-
rior image quality over long distances. As a result, this significantly reduced installation and cabling costs. To transfer recorded video images and other important messages - such as administration announcements, advertisements and emergency evacu- ation alerts - from the PoE switch in the control room back to the station on LED/LCD displays, the uplink gigabit fibre SFP ports of the switches are used to transfer data over a fibre optic network. The JetNet 5310G switches support Korenix’s patented Multiple Super Ring (MSR) redun- dancy protocol, which allows administrators to form a fibre ring network for transferring video images in real time with no loss or system collision.
The JetNet 5310G PoE switches, which operate in ambient temper- atures from -40°C to 75°C, with- stand extremely high temperatures and harsh city conditions such as non-line-of-sight, high interfer- ence and extreme environmental conditions such as strong winds, fog, dust and high humidity.
Benefits of choosing JetNet 5310G System reliability in terms of PSE (Power Sourcing Equipment) relia- bility, PD (Powered Device) reliabil- ity and link reliability (the connection between the PSE and the PD i.e. the switch and camera, ensur- ing maximum up-time), were key factors in the customer selecting the JetNet 5310G switches.
Above: Korenix provided its JetNet 5310G PoE (Power over Ethernet) switches to a video surveillance project in Tel Aviv, Israel
Left: Korenix IP surveillance
network solutions are utilised in a wide range of industry sectors, including transportation, traffic
management, airports, oil and gas installations, and city surveillance system
In addition, the switches comply with LPLD (Link Partner Line Detect), a Korenix protocol that sends a simple ‘hello’ message to check that the PD is still responding. If it fails to receive a reply in a specified time limit, it will power cycle the PoE power on the port to see if it can bring the PD back online. The switches also provide video transmission by opti- mised IGMP, as well as stable high power PoE delivery across a wide operating temperature range. Korenix’s PoE switches are being deployed globally in surveillance net- works due to their uplink capabilities and patented ring system redun- dancy protocols. Korenix’s range of IP surveillance network solu- tions are compatible with the leading IP camera product suppli- ers, including Axis, Mobotix, Sony, Bosch and Pelco.
This range includes 12V and 24V power boost technologies that bring PoE to vehicle, bus and rail applications, making mobile IP surveillance more practical, cost effective and reliable. Korenix’s patented MSR (Multiple Super Ring) technology provides a continuous IP network for critical video transmissions, and any network failures can be recovered within just 5ms on break and on reconnection 0ms, minimising network redun- dancy and improving video quality. Santos Muro, business develop- ment manager at Korenix UK com- mented, “Korenix IP surveillance network solutions are being utilised in a wide range of industry sectors, including transportation, traffic man- agement, airports, oil and gas installa- tions, and city surveillance systems. Korenix’s MSR guarantees that the failure recovery time of the network is within five milliseconds, which means that video streams are pro- tected from any network failures and so can be resumed instantaneously. Compared to other protocols, MSR offers the most reliable, high quality IP surveillance network solution.”
Korenix
www.korenix.co.uk T: 01527 529 774
Automation NOVEMBER/DECEMBER 2013
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