Korenix JetNet 5728G series, Руководство пользователя

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4.4.2 Emergency Power Management
The JetNet 5728G series is offered with dual 48VDC power inputs for providing true
network redundancy. An alarm relay output signals when a power input fails or other critical
events occur. To ensure reliable power delivery, other advanced PoE power management
features include individual port status monitoring, emergency power management (3 power
supply indication inputs for quick shutdown of ports according to pre-defined priority table in
cases where power supply failure occurs) and voltage/current monitoring and regulation.
Power management allows the JetNet 5728G series to determine the exact power draw per
port and to balance each port PoE power output accordingly. This, in turn, allows the switch
to power higher and lower wattage devices according to user-definable parameters such as
maximum available power, port priority (critical, high, low), and maximum allowable power
per port. For the same level priority, the priority order is decided by port number. The port
number sequence of JetNet 5728G-24P from high priority to low priority is 3-4-1-2-7-8-5-6-
11-12-9-10-15-16-13-14-19-20-17-18-23-24-21-22-27-28-25-26. For JetNet 5728G-16P,
the priority sequence is 3-4-1-2-7-8-5-6-11-12-9-10-15-16-13-14. For JetNet 5720G-8P,
the priority sequence is 3-4-1-2-7-8-5-6.
You can configure the power budget of DC Power 1 and 2 by following Web GUI. The valid
range of budget is 1 – 480 Watts. And the default power budget of inside AC power supply
is 300 Watts.
4.4.3 PD Status Detection
JetNet 5728G delivers a useful function – PD Status Detection. This provides automatic
detection of a remote device powered by JetNet 5728G. If the remote system crashes or is
unstable, JetNet 5728G will perform a system reboot by turning off and on again to trigger
the remote device. The following figure shows the Web configure interface for Power over
Ethernet PD Status Detection.