Auto configuration Ethernet switch from OT Systems

Hong Kong

OT Systems is, introducing the first self-configured Ethernet Switch, ET4222PpH, which has been designed for high reliability, high efficiency, and plug-and-play integration and is specifically for IP CCTV applications.  The ET4222PpH has been developed to provide users with increased bandwidth capacity, reduced video loss, and redundant power for security spanning long distances.

The OT Systems ET4222PpH supports IGMP with a simple click of a dip switch. In large IP CCTV surveillance systems, IP cameras employ multicast transmission to reduce the required bandwidth. However, an unmanaged Ethernet switch is often poorly equipped to receive multicast packets; it treats them as broadcast packets. The system then sends the 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, the whole network performance could be drastically reduced and, in some cases, could result in whole system failure. But, OT Systems has 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.

As it supports jumbo frame (9000 bytes), the OT Systems ET4222PpH significantly improves the network performance by providing less overheads and a higher payload capacity. 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 has 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 ET4222PpH 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 one of the power supplies has failed and the system requires attention. According to OT Systems this switch works especially well in high availability systems.


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