Ac Poe Power Supply Units; Function Overview; Panel; Figure 2-4 Appearance Of The 250 W Ac Poe Power Supply Unit - Huawei Quidway S3300 Series Hardware Description

Quidway S3300 Series Ethernet Switches
Hardware Description

2.3 AC PoE Power Supply Units

This section describes the functions, appearance, switch, indicators, and technical specifications
of the S3300 AC PoE power supply unit.

2.3.1 Function Overview

2.3.2 Panel

2.3.3 Technical Specifications
2.3.1 Function Overview
Power over Ethernet (PoE) refers to power supply over a 10Base-T, 100Base-TX, or 1000Base-
T twisted pair cable.
PoE provides power for terminals such as IP phones, access points (APs), portable device
chargers, point-of-sale (POS) machines, cameras, and data collectors. These terminals are
powered when they access the network, so the indoor power supply systems are not required.
Complying with IEEE 802.3af and IEEE 802.3at, the PoE S3300 is able to remotely provide
power for the devices of different vendors. IEEE 802.3af supports a maximum of 15.4 W power
and IEEE 802.3at supports a maximum of 30 W power.
The PoE function transmits power together with data to terminals over cables or transmits power
without data over idle lines. The S3300 can transmit power together with data at a rate of up to
1000 Mbit/s.
2.3.2 Panel
The S3300 supports the 250 W PoE power supply unit, as shown in
power supply unit, as shown in
units are different.

Figure 2-4 Appearance of the 250 W AC PoE power supply unit

1. Indicator
Issue 01 (2011-01-30)
1 2 3
2. Handle
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Copyright © Huawei Technologies Co., Ltd.
Figure 2-5. The power fan appearances of the two power supply
4 5
3. Fan
2 Power Supply Unit
Figure 2-4, and 500 W PoE
4. Switch 5. AC jack
2-5