SecurityWorldMarket

26/08/2019

Intelligent self-configured Ethernet IP CCTV switch

Hong Kong, China

OT Systems is introducing, what is thought to be the first self-configured Ethernet switch, designed to offer IP CCTV applications, increased reliability and efficiency with plug-and-play integration.

The transmission specialists developed the ET4222PpH to provide users with increased bandwidth capacity, reduced video loss, and redundant power for security systems spanning long distances.  Developed with four-part 1000M TX + two-part 1000M SFP , the ET4222PpH is an innovative switch that works in harsh environments, such as deserts, with operating temperature from -40℃ to 75℃.

With a single dip swich, the ET4222PpH can support IGMP and integrate efficiently with large IP CCTV application systems that employ multicast transmission to save network bandwidth. No PC is required and it easily configures to a managed switch. The ET4222PpH features a two-fibre, port-supported cascaded connection ideal for highway CCTV surveillance systems. It offers a high power PoE (30W max.) robust enough to support PTZ IP cameras.

OT Systems designed the ET4222PpH to support IGMP with a simple click of a dip switch. In large IP CCTV surveillance systems, IP cameras employ multicast transmission to reduce the needed bandwidth. However, an unmanaged Ethernet switch is poorly equipped to receive multicast packets; it converts them to broadcast packets. The system then sends broadcast packets to every port in the switch resulting in video loss or disconnection. OT Systems has eliminated that concern. By simply changing the dip switch, the ET4222PpH efficiently receives multicast packets and only forwards the data to the appropriate port. This innovative feature saves bandwidth and maximizes the switch performance, increasing the systems effectiveness and reliability.

The ET4222PpH supports broadcast storm control, preventing broadcast overload. If an Ethernet device, such as an IPC, inadvertently goes into an unstable state and continuously sends out broadcast packets, whole network performance is drastically reduced and, in some cases, results in whole system failure. But, OT Systems developed the ET4222PpH to detect broadcast packet flooding the ports and automatically suppress them to the minimum level (1% of Ethernet Port Speed.) The system automatically makes the adjustment without impact to the network performance.

It supports jumbo frame which significantly improves the network performance by providing less overhead and a higher payload capacity. The above figure shows the difference between standard frame (1522 bytes) and jumbo frame (9000 bytes). The jumbo frame has less than five times the overhead when compared to standard frame and 5 times more payload (the actual data.) This enhanced payload capacity results in better, more efficient channel utilisation. This structure is best suited for IP CCTV surveillance as the video stream is continuous every second.

OT Systems designed the ET4222PpH to support daisy-chain connection, allowing the switches to be cascaded with each other. This system feature is most suited for highway applications where the cameras or the stations are located in a line along the highway. This reduces fibre costs and provides a simpler installation.

The Ethernet Switch supports two 48VDC power supply inputs. The two supplies share the load, providing constant redundancy. If one power supply fails, the other input will take over power and fully supply the entire switch eliminating the risk of packet loss.

Additionally, the closed failure alarm contact activates the alarm device, alerting the operator that the system requires attention. This switch works especially well in high availability systems.


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