No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

Configuration Guide - WLAN-AC

S5700 and S6720 V200R012C00

This document describes the configurations of WLAN, including WLAN Service Configuration, Radio Resource Management, Roaming, WLAN QoS, WLAN Security, WDS, Mesh, Location, Hotspot 2.0, Dual-Link Cold Backup, N+1 Backup.
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Understanding PoE

Understanding PoE

Components in a PoE System

A PoE system involves the following devices:
  • Power-sourcing equipment (PSE): The PSE provides power for powered devices (PDs) on the Ethernet, and supports detection, analysis, and intelligent power management.
  • PD: PDs are provided with power, such as wireless APs, portable device chargers, POS machines, and cameras. According to whether a PD conforms to an IEEE standard, PDs are classified into standard and non-standard PDs.
  • PoE power supply: The PoE power supply provides power for the PoE system. The number of PDs connected to the PSE is limited by power of the PoE power supply. According to whether a PoE power supply is swappable, PoE power supplies are classified into built-in and external power supplies.

PoE Power Supply Standards

PoE power supply standards include IEEE 802.3bt, IEEE 802.3at, and IEEE 802.3af. PoE technical specifications vary depending on the PoE power supply standard. For details, see Table 5-8.

APs are classified as follows by the supported PoE power supply standard:
  • 802.3bt AP: is also called UPoE AP, and supports IEEE 802.3bt and IEEE 802.3at. Functions supported by APs vary depending on the PoE power supply standard. For details, see Table 5-6.
  • 802.3at AP: supports IEEE 802.3at and IEEE 802.3af. Functions supported by APs vary depending on the PoE power supply standard. For details, see Table 5-7.
  • 802.3af AP: supports only IEEE 802.3af.

Function Comparison for APs in Different Power Supply Standards

802.3bt AP

802.3bt APs support IEEE 802.3bt and IEEE 802.3at. Table 5-6 compares the function support by 802.3bt APs in different power supply standards.
Table 5-6  Function support by 802.3bt APs

AP Model

802.3bt Power Supply

802.3at Power Supply

AP7050DN-E

The functions are not restricted when the AP is powered by 90 W 802.3bt.

  • When the AP is powered by 90 W 802.3bt, the functions are not restricted, and the maximum power supported by PoE out is 45 W.
  • When the AP is powered by 60 W 802.3bt, PoE out is not supported.

The USB function and PoE out are not supported.

  • The 2.4 GHz radio supports 2x2 MIMO, and the maximum transmit power of each spatial stream is adjusted to 20 dBm.
  • The 5 GHz radio supports 3x3 MIMO, and the maximum transmit power of each spatial stream is adjusted to 25 dBm.
AP7052DN and AP7152DN

The functions are not restricted.

The USB function is not supported. The radio power is managed in self-adaptive mode. The IoT card power is restricted within 0.5 W.

When the AP is powered by 802.3at through an Ethernet port, only this Ethernet port is enabled while other ports are shut down. When two Ethernet ports are used to power the AP, the two ports are both enabled.

AP6052DN

The functions are not restricted.

The USB function and GE port are not supported. The radio power is managed in self-adaptive mode.
AP7052DE

The functions are not restricted.

The USB function is not supported. The radio power is managed in self-adaptive mode.

When the AP is powered by 802.3at through an Ethernet port, only this Ethernet port is enabled while other ports are shut down. When two Ethernet ports are used to power the AP, the two ports are both enabled.

AP8082DN and AP8182DN
  • The functions are not restricted when the PoE_OUT port has no power output.
  • When the PoE_OUT port has power output, the 5GE/PoE_IN port and optical ports that go Up first can work. The radio power is reduced, and the 2.4 GHz and 5 GHz radios work in 3T4R mode.

    The 3T4R mode indicates that a radio transmits signals through three spatial streams and receives signals through four spatial streams.

PoE out is not supported. The 5GE and optical ports can work only in Up state. The GE/POE_OUT port is shut down. The radio power is reduced. The 2.4G radio works in 2T4R mode.

The 2T4R mode indicates that a radio transmits signals through two spatial streams and receives signals through four spatial streams.

The AP9430DN-12 supports only DC power supply through the matching power adapter.

802.3at AP

802.3at APs support IEEE 802.3at and IEEE 802.3af. Table 5-7 compares the function support by 802.3at APs in different power supply standards.
Table 5-7  Function support by 802.3at APs

AP Model

802.3at Power Supply

802.3af Power Supply

AP4050DN-HD
  • When the PoE_OUT port has no power output, the maximum transmit power is adjusted to 19 dBm (2.4 GHz and 5 GHz radios).
  • When the PoE_OUT port has power output, the maximum transmit power is adjusted to 13 dBm (2.4 GHz radio) and 17 dBm (5 GHz radio).

PoE out is not supported, and the maximum transmit power is adjusted to 13 dBm (2.4 GHz radio) and 17 dBm (5 GHz radio).

R250D-E and AP2050DN-E

The USB function and 10 W PoE out are supported.

The USB function is disabled, and PoE out is not supported.

AP2050DN, AP2050DN-S, AP4051DN, AP4151DN, and AP4051DN-S

The functions are not restricted.

The USB function is disabled.

AP8050DN, AP8150DN, AP8050DN-S, AP6510DN, AP7110DN, AP8030DN, AP8130DN, AP7030DE, AP9330DN, AP9131DN, and AP9132DN

The functions are not restricted.

All radios are disabled.

AP4030TN

The functions are not restricted.

The USB function and all radios are disabled.

AP4051TN

The functions are not restricted.

The USB function is not supported. All the three radios transmit signals through one spatial stream and receives signals through N spatial streams. N specifies the maximum number of spatial streams for receiving signals.

AP4050DN-E
  • When the AP has no IoT card connected and does not use the USB port, the maximum PoE out power is 7 W.
  • When the AP has an IoT card connected and does not use the USB port, the maximum PoE out power is 5.5 W.
  • When the AP has two or more IoT cards connected or uses the USB port, PoE out is disabled.

The USB function and all radios are disabled, and PoE out is not supported.

AP6050DN, AP6150DN, and AP7050DE
  • When the AP has a USB device connected, the 2.4 GHz radio supports 2x2 MIMO.
  • When the AP has no USB device connected, the 2.4 GHz radio supports 4x4 MIMO.

The USB function and all radios are disabled.

AP8050TN-HD

The functions are not restricted.

All the three radios transmit signals through one spatial stream and receives signals through two spatial streams.
R251D

The functions are not restricted.

The functions are not restricted.

AP2051DN

The functions are not restricted.

The USB function is disabled.

R251D-E, AP2051DN-E

The PoE out and USB functions are mutually exclusive. The PoE out function is enabled by default.

The USB function is disabled, and PoE out is not supported.

802.3af AP

802.3af APs support IEEE 802.3af, and their functions are not restricted.

All other APs support IEEE 802.3af except the 802.3bt and 802.3at APs listed in the preceding table.

Working Process of PoE Power Supply

802.3bt AP

Figure 5-2 shows the PoE working process of an 802.3bt AP.

Figure 5-2  PoE working process of an 802.3bt AP

The 802.3bt APs that support hardware detection include the AP7052DN, AP7152DN, AP6052DN, AP7052DE, AP8082DN, and AP8182DN.

802.3bt APs that do not support hardware detection include the AP7050DN-E.

802.3at AP

Figure 5-3 shows the PoE working process of an 802.3at AP.

Figure 5-3  PoE working process of an 802.3at AP

802.3at APs that support hardware detection include the AP4050DN-HD, R250D-E, AP2050DN, AP2050DN-S, AP2050DN-E, AP4051DN, AP4151DN, and AP4051DN-S.

802.3at APs that do not support hardware detection include the AP6510DN, AP7110DN, AP8030DN, AP8130DN, AP7030DE, AP9330DN, AP9131DN, AP9132DN, AP4030TN, AP4050DN-E, AP6050DN, AP6150DN, AP7050DE, AP4051TN, AP8050TN-HD, AP8050DN, AP8150DN, and AP8050DN-S.

802.3af AP

APs always work in 802.3af power supply mode after being started.

PoE Power Management Mode

When PDs connected to the PSE increase, the PoE power supply cannot provide power for all PDs. Therefore, the PSE should manage the power supply. Power management is classified into two modes: automatic and manual.

  • Automatic mode: The PSE automatically powers on or powers off PDs based on power priorities. You can configure a power priority of each port as Critical, High, or Low based on the importance of the PD connected to each port. When providing power nearly at full capacity, the PSE provides power first for the PD connected to the port of Critical priority and then provides power for the PD connected to the port of High priority. If multiple PoE ports have the same priority, the system first supply power to the PDs connected to the ports with smaller port numbers.

  • Manual mode: You can manually power on or power off ports. In manual mode, the PSE provides power for a port without considering the priority. Powering on or powering off a single port does not affect the power supply status. When providing power nearly at full capacity, the PSE cannot continue to power on a new PD.

Power Supply Mode of PSEs

As defined in IEEE standard, PSEs provide power for PDs and are classified into MidSpan (the PoE module is installed out of the device) and Endpoint (the PoE module is integrated to device) PSEs. Huawei's PoE modules are Endpoint PSEs. The Endpoint PSE is compatible with 1000Base-T, 100Base-TX, and 10Base-T ports. The Endpoint PSE is more widely used than the Midspan PSE.

Endpoint PSEs can work in Alternative A (line pair 1/2 and line pair 3/6) and Alternative B (Line pair 4/5 and line pair 7/8) power supply modes according to different copper line pairs.
  • Alternative A mode: Power is transmitted over pairs of lines that transmit data.

    The PSE provides power for the PD over copper line pairs connected to pins 1 and 2 and pins 3 and 6. Pins 1 and 2 use the positive voltage and pins 3 and 6 use the negative voltage.

    10Base-T and 100Base-TX ports use copper line pairs connected to pins 1 and 2 and pins 3 and 6 to transmit data, and 1000Base-T ports use four line pairs to transmit data. DC power and data frequency are independent. Therefore, the power and data can be transmitted in one pair of lines.

  • Alternative B mode: Power is transmitted over idle pairs of lines.

    The PSE provides power for the PD over copper line pairs connected to pins 4 and 5 and pins 7 and 8. Pins 4 and 5 use the positive voltage and pins 7 and 8 use the negative voltage.

Generally, a standard PD supports the two modes, whereas the PSE only needs to support one mode. Huawei PSE supports only Alternative A.

PoE Technical Specifications

PoE technical specifications vary depending on PoE technologies. You can select the required PoE technology to power on PDs according to PD requirements.

Table 5-8  PoE technical specifications

Power supply technology

PoE

PoE+

PoE++

Power supply distance

100 m

100 m

100 m

Power class

0-3

0-4

0-8

Maximum current

350 mA

600 mA

1730 mA

PSE output voltage

44 V DC-57 V DC

50 V DC-57 V DC

50 V DC-57 V DC

PSE output power

≤ 15400 mW

≤ 30000 mW

≤ 90000 mW

PD input voltage

36 V DC-57 V DC

42.5 V DC-57 V DC

42.5 V DC-57 V DC

Maximum PD power

12950 mW

25500 mW

81600 mW

Cable requirements

Unstructured

CAT-5e or better

CAT-5e or better

Power supply cable pairs

2

2

4

  • PoE technology complies with IEEE 802.3af.
  • PoE+ technology complies with IEEE 802.3at.
  • PoE++ technology complies with IEEE 802.3bt.
Translation
Download
Updated: 2018-12-24

Document ID: EDOC1100038361

Views: 158827

Downloads: 436

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next