Huawei S37/27 500W AC 02130879 ユーザーズマニュアル

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 S3700 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 S3700 can transmit power together with data at a rate of up to
100 Mbit/s.

The S3700 supports the 250 W PoE power supply unit, as shown in 

, and 500 W PoE

power supply unit, as shown in 

. The power fan appearances of the two power supply

units are different.

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

1

2

3

5

4

1. Indicator

2. Handle

3. Fan

4. Switch

5. AC jack

Figure 2-5 Appearance of the 500 W AC PoE power supply unit

1 2

3

5

4

1. Indicator

2. Handle

3. Fan

4. Switch

5. AC jack

Quidway S3700 Series Ethernet Switches
Hardware Description

2 Power Supply Unit

Issue 03 (2012-07-20)

Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd.

16