Cisco Systems AIR-CT2504-5-K9, 2500 manual Green or Blinking Green-Link activity

Callout	Port and LEDs	State and Description
1	GigE port and LED	The Gigabit Ethernet port is an RJ-45 connector
		form-factor. This port is designed so that 1500 VAC rms
		isolation (per the 802.3 specification) is met between
		chassis ground and any 48V/Ethernet signal.
		LED description:
		• Green or Blinking Green—Link activity
		•	Off—No link
2	GigE port and LED	The Gigabit Ethernet port is an RJ-45 connector
		form-factor. This port is designed so that 1500 VAC rms
		isolation (per the 802.3 specification) is met between
		chassis ground and any 48V/Ethernet signal.
		LED description:
		• Green or Blinking Green—Link activity
		•	Off—No link
3 & 4 POE GigE Power-over-Ethernet		The Gigabit POE ports are RJ-45 connector
	(POE) ports	form-factor. They provide a I2C communications
		channel between the PSE controller and host CPU TWSI
		bus #1. This interface supports the proper voltage
		isolation as defined by 802.3. The POE controller is
		configured to I2C address 0x40/41 (0100 000r/w).
		The POE controller reset is driven from system reset. If
		software needs to reset the POE controller, it can do so
		over I2C.
		LED description:
		• Green or Blinking Green—Link activity
		•	Off—No link

Note Ports 3 and 4 are PoE only ports; do not connect access point devices to these ports. The ports can be used for infra-switch connection using multiple an AP-Manager or data interface.

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