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1. Introduction

"Inline power" is a feature offered on some Ethernet switches. It is a means by which the switch

can supply power to a network device within the same cable that carries the Ethernet signaling.

This simplifies network installation and powering design, removing the need for a separate

power supply for each IP telephone in the network. IEEE 802.3af-2003 defines a standard

protocol to be used by powering and powered devices.

The 3Com SuperStack 3 Switch 4400-PWR is a 24-port (24 10/100Base-TX) Ethernet switch. It

supplies 150 watts of power for PoE applications compatible with the IEEE 802.3af-2003

standard. Avaya 4600 Series IP telephones, Avaya wireless LAN access points, and the 3Com

SuperStack 3 Switch 4400-PWR comply with this standard. These Application Notes show how

Avaya IP telephones and wireless LAN access points can be connected to the 3Com SuperStack

3 Switch 4400-PWR. Web-based configuration that display and control powering status of the

switch ports are also demonstrated.

The Avaya product configurations addressed by these Application Notes are shown in Figure 1.

The following Avaya products are directly connected to the switch:

• 4602 and 4602SW IP Telephones

• 4610SW IP Telephone

• 4620 and 4620SW IP Telephones (including the optional EU24 Button Expansion

Module)

• 4630SW IP Screenphone

• Gen-2 4606, 4612, and 4624 IP Telephones

• Gen-1 4612 and 4624 IP Telephones with 30A Ethernet Switch Base

• AP 3 and AP 5 Access Points

The Gen-1 Avaya 4612 and 4624 IP Telephones require the Avaya 30A Switch Base if power

over Ethernet is required. Figure 2 shows the connections for the 30A switch base. The 4612

and 4624 telephones can be identified as Gen-1 or Gen-2 by inspecting the model number. "1A"

in the model number indicates Gen-1; "2A" indicates Gen-2. The model number can be found

by:

• Inspecting the label attached to the bottom of the telephone.

• Pressing Mute, V, I, E, W, # on the keypad and then pressing * until the model number

appears. Press # to exit.

Examples of model numbers are "4612D01A-003" (Gen-1) and 4612D02A-003 (Gen-2).

The powering tests included verification of the following after each product was connected to the

switch:

SZ; Reviewed:

WCH 3/19/2004

Solution & Interoperability Test Lab Application Notes

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3com-PoE-Config.doc