Huawei AirEngine 5773 PoE Requirements by Model: 802.3af vs 802.3at and the 5773-23WP PoE++ Exception

Quick Answer

Most Huawei AirEngine 5773 access points do not require an IEEE 802.3bt PoE++ port. However, the correct power requirement depends on the exact model.

• AirEngine 5773-21, 5773-22P, 5773-23HW, and 5773-23W are officially listed as supporting IEEE 802.3at and 802.3af.
• AirEngine 5773-23WP is officially listed as supporting IEEE 802.3bt, 802.3at, and 802.3af.
• Huawei states that some models operate with restrictions when powered through 802.3af. USB unavailability is one documented example, but it should not be treated as a complete restriction list for every model and firmware version.
• For a new deployment, 802.3at PoE+ is the appropriate default for the 802.3at/af models.
• For the 5773-23WP, check the model-specific datasheet and required wired or PoE output functions before deciding that an 802.3at port is sufficient.

You can compare currently available models in the Huawei indoor Wi-Fi 7 access point collection.

Why We Changed the Original PoE Assumption

Our initial content plan treated the AirEngine 5773 family as a uniform 802.3af/at product line and assumed that 802.3bt was not relevant to any model. A model-by-model verification showed that this was too broad.

Huawei's official specifications list 802.3at/af for the 5773-21, 5773-22P, 5773-23HW, and 5773-23W. The same official model table lists 802.3bt/at/af for the 5773-23WP.

We therefore replaced the series-wide claim with a model-specific power matrix. This matters because a technically correct statement about one 5773 model may be wrong when applied to another model with different ports and power functions.

AirEngine 5773 PoE Requirements by Model

For projects using hybrid optical-electrical cabling, also compare the AirEngine 5773-23H with the 5773-23HW before finalizing the bill of materials.

802.3af vs 802.3at vs 802.3bt

The powered-device values are standardized power budgets, not a prediction of what an AP will continuously consume. A switch may allocate more power than the AP is using at a particular moment.

When selecting equipment, evaluate both the per-port PoE standard and the switch's total PoE power pool. A switch may have many PoE+ ports but still lack enough total power to operate all ports at their maximum allocation simultaneously.

What Huawei Confirms About 802.3af Restricted Operation

Huawei documentation states that an AP may operate with restrictions when powered by 802.3af and gives an unavailable USB port as an example.

The phrase "for example" is important. It means USB unavailability is a confirmed restriction, but it does not establish that USB is the only possible restriction for every AirEngine 5773 model, hardware revision, and software release.

The available manufacturer documentation does not, by itself, prove that 802.3af will:

• Disable the 5 GHz radio
• Reduce the number of spatial streams
• Reduce channel width
• Disable Multi-Link Operation
• Reduce transmit power
• Reduce wireless throughput
• Increase packet loss
• Cause the AP to restart

Those behaviors should only be reported after they have been reproduced on the exact AP model, firmware version, PSE, cable, controller, configuration, and client used in the test.

Which PoE Standard Should You Specify?

For the 5773-21, 5773-22P, 5773-23HW, and 5773-23W

Specify 802.3at PoE+ for a new installation. It is the higher of the two officially listed input standards and provides substantially more power headroom than 802.3af.

An existing 802.3af switch may power the AP, but the installation should not be approved simply because the AP starts and broadcasts an SSID. Confirm the required USB, IoT, radio, uplink, and stability functions before accepting restricted operation.

For the 5773-23WP

The 5773-23WP requires separate consideration because Huawei explicitly lists 802.3bt, 802.3at, and 802.3af.

The official product page does not justify a blanket statement that all 5773-23WP functions are identical under all three input standards. Review the current datasheet and verify the AP's required downlink, USB, and power functions before choosing the access switch.

Projects that need a higher-power access layer can compare Huawei PoE switches or the broader collection of PoE, PoE+, and PoE++ network switches.

Can a Huawei S5735 Switch Power an AirEngine 5773?

It depends on the exact S5735 model, its per-port PoE capability, installed power supplies, and total available PoE budget.

When comparing Huawei CloudEngine S5735 series switches, check all of the following:

• Whether the selected ports support 802.3at or 802.3bt
• The maximum power available on each AP-facing port
• The total PoE power pool with the installed power supplies
• The remaining budget after IP phones, cameras, and other devices are included
• The power budget after a power-supply failure
• The Ethernet speed supported on the AP-facing port
• PoE monitoring, port priority, and remote restart capability

Do not select a switch only by the number of PoE ports. A 48-port model may not have enough total budget to provide the maximum negotiated power to 48 access points at the same time.

Exact-SKU evidence examples (Huawei hardware descriptions): The S5735S-L24P4X-A1 has 24 PoE+ ports and a built-in 380 W PoE power pool, sufficient for 12 ports at full 802.3at allocation. The S5735I-L8P4X-A-V2 has a built-in 125 W PoE power pool, sufficient for four ports at full 802.3at allocation. These two examples show why model-specific budgeting matters; they do not establish 802.3bt output support or suitability for every 5773-23WP feature. Verify the exact switch PID, software release, input power, PSU configuration, and AP function requirements before approval.

How to Estimate the PoE Budget

Use the maximum consumption listed for the exact AP part number rather than one generic number for the entire 5773 family.

A basic planning formula is:

Required PoE budget = number of APs × model-specific maximum power + connected accessory power + engineering reserve

The engineering reserve should account for:

• Simultaneous AP startup
• USB or IoT accessories
• PoE-out devices where supported
• Cable loss
• Measurement tolerance
• Future AP additions
• Power-supply redundancy
• Other powered devices sharing the same switch

For model-specific procurement records, compare the current Huawei document with the files available in the network-switch.com datasheet library.

Existing 802.3af Switch, PoE+ Injector, or Switch Upgrade?

Continue Using the Existing 802.3af Switch

This has the lowest immediate cost but the greatest functional uncertainty. Use it only after verifying the exact AP model and all functions required by the project.

Add an 802.3at Injector

An 802.3at injector can be practical for one or two APs where replacing the access switch is not economical. Confirm that the injector supports the required Ethernet link speed as well as the required PoE standard.

An injector also adds another powered device, another cable connection, and another failure point. It normally provides less centralized monitoring and remote control than a managed PoE switch.

Upgrade the Access Switch

For a multi-AP deployment, a managed PoE switch is usually the cleaner operational design. It provides centralized power monitoring, per-port restart, alarm visibility, power priority, and simpler capacity planning.

Small and medium-sized organizations can review the wireless network solution for SMEs for a broader design that includes switching, wireless coverage, routing, and management.

Larger Huawei deployments can also review the Huawei intelligent campus office network solution. Organizations comparing multiple vendors can use the enterprise office network solution as a vendor-neutral starting point.

How to Verify the Actual Power Mode

A valid verification should record the exact AP identity and compare the device state under controlled power conditions.

1. Record the AP model, part number, hardware revision, and firmware version.
2. Record the switch or injector model and software version.
3. Confirm the PoE type and class requested by the AP.
4. Confirm the power allocated by the PSE.
5. Record the switch-port power reading.
6. Check the AP and controller for restricted-power warnings.
7. Verify the USB, IoT, wired downlink, and PoE-out functions required by the project.
8. Record the active radios, channel width, spatial streams, and negotiated client rate.
9. Repeat the same test without changing the cable, RF configuration, client, or traffic path.
10. Change only one variable at a time when diagnosing a difference.

If the AP shows restricted power, unstable negotiation, or unexpected interface behavior, send the AP model, firmware version, switch model, and PoE status output to the network-switch.com technical support team.

Buying Checklist

• Exact AirEngine 5773 model and part number
• Official PoE standards for that model
• Whether USB or IoT expansion is required
• Whether PoE-out or wired downlink functions are required
• Per-port PoE standard of the selected switch
• Total switch PoE budget
• PoE budget after a power-supply failure
• AP uplink speed and switch-port speed
• Cable type and maximum cable length
• Controller and firmware compatibility
• Current AP quantity and future expansion
• Other PoE devices on the same switch

After confirming the model and power design, check current inventory and request a project quotation for the APs, PoE switches, injectors, cables, and spare units.

Conclusion

The AirEngine 5773 family should not be assigned one universal PoE requirement. Most models reviewed here use 802.3at/af, while the 5773-23WP also supports 802.3bt.

Use 802.3at as the normal design standard for the at/af models, treat 802.3af as a potentially restricted mode, and evaluate the 5773-23WP separately. Most importantly, do not publish a radio, throughput, stability, or power conclusion unless it has been measured on the exact device and configuration being discussed.

For a complete bill of materials covering AirEngine APs, Huawei switches, injectors, cabling, controllers, and spares, contact the network-switch.com project team.

Official Sources

• Huawei AirEngine 5773-21 official product page
• Huawei AirEngine 5773-21 official datasheet
• Huawei AirEngine 5773-22P official product page
• Huawei AirEngine 5773-22P official datasheet
• Huawei AirEngine 5773-23HW official product page
• Huawei AirEngine 5773-23HW official datasheet
• Huawei AirEngine 5773-23WP and 5773-23W official product page
• Huawei AirEngine 5773-23WP and 5773-23W official datasheet
• IEEE 802.3-2022 Standard for Ethernet
• IEEE 802.3 Ethernet Working Group
• Huawei S5735S-L24P4X-A1 hardware description
• Huawei S5735I-L8P4X-A-V2 hardware description

This article is based on a model-by-model review of Huawei product pages and datasheets. It does not present laboratory throughput, power-meter, packet-loss, or radio-performance results as first-hand measurements.