Video and IoT solutions provider Dahua Technology USA is rolling out a new generation of Power over Ethernet (PoE) transmission devices, designed to provide higher power and protection, further transmission distances, and smarter management features. These PoE 2.0 switches, now available through all authorized Dahua distributors in North America, come in 16-port and 24-port gigabit models, both designed for field transmission applications and high-definition video.

“Our slogan for PoE 2.0 is ‘higher, further, smarter,’” said Damon Chou, solutions product manager for Dahua USA. “This represents the features Dahua has built into the new PoE devices that make them well-suited for a wide range of applications and integrations.”

The new switches support the IEEE 802.3bt standard, which supports up to 90 watts on the red labeled ports — ideal for IoT devices with higher power requirements. The 90W ports are backward compatible so users can connect devices that still use old PoE standard, if necessary. The 8-wire PoE transmission offers a more stable connection than previous models and has a transmission distance of approximately 820 feet. Features for smarter management include PoE Watchdog, Intelligent PoE, and non-blocking video transmission.

PoE Watchdog is a “self-healing” function by which the switch detects signals from cameras on the network. “If it doesn’t receive any signal, it will do an automatic power cycle to restart the camera,” Chou added. “This is a great feature that keeps installers from having to physically go on site to check whether cables are okay or whether they’re physically connected.” Dahua’s testing shows that PoE Watchdog auto-detects and recovers 99 percent of faulty cameras.

Intelligent PoE is a power consumption management tool that guarantees power to ports designated as top priority. This ensures that mission-critical devices won’t lose power or data after power fluctuations. “Unlike typical switches that shut down all ports at once, this switch shuts down the largest number port first, then the next largest, until it detects the power consumption is below the PoE budget,” Chou said. “For example, if the switch has eight PoE ports and each port is connected to a network camera, the switch disables port number eight first, then subsequent ports, until the power budget is below the threshold wattage.”

Both the 16-port switch (DH-PFS4218-16GT2GF-240) and the 24-port switch (DH-PFS4226-24GT2GF-360) have two gigabit uplink combo ports in addition to the PoE ports, and support Layer 2 PoE, PoE+, Hi-PoE, and PoE++.

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