Cisco sb sf300-48pp-k9-eu Инструкция по эксплуатации онлайн [7/16] 180679

Cisco 300 Series Managed Switches 7

NOTE The switch can deliver a maximum of 15.4 Watts to any 10/100 or

Gigabit PoE port. The 24MP, 28MP, 52P and 52MP models of the switch

can deliver a maximum of 30 Watts to any PoE port.

WARNING The switch is to be connected only to PoE networks without

routing to the outside plant.

CAUTION Consider the following when connecting switches capable of

supplying PoE:

The PoE models of the switches are PSE (Power Sourcing

Equipment) that are capable of supplying DC power to

attaching PD (Powered Devices). These devices include VoIP

phones, IP cameras, and wireless access points. The PoE

switches can detect and supply power to pre-standard

legacy PoE Powered Devices. Due to the support of legacy

PoE, it is possible that a PoE switch acting as a PSE may

mistakenly detect and supply power to an attaching PSE,

including other PoE switches, as a legacy PD.

Even though PoE switches are PSE, and as such should be

by another PSE due to false detection. When this happens,

the PoE switch may not operate properly and may not be

able to properly supply power to its attaching PDs.

To prevent false detection, you should disable PoE on the

ports on the PoE switches that are used to connect to PSEs.

You should also first power up a PSE device before

connecting it to a PoE switch. When a device is being falsely

detected as a PD, you should disconnect the device from the

PoE port and power recycle the device with AC power

before reconnecting its PoE ports.