KEY FEATURES
• Up to 5.37Gbps combined peak datarate
• WPA3 and Enhanced Open security
• Built-in technology that resolves sticky client issues for Wi-Fi 6 and Wi-Fi 5 devices
• OFDMA and MU-MIMO for enhanced multi-user efficiency
• IoT-ready Bluetooth 5, NFC, and Zigbee support
• Optional tri-radio mode with two 5GHz and one 2.4Ghz radio (4x4 MIMO)
• Embedded ranging technology for accurate indoor location measurements
ANTENNA PATTERNS
Horizontal planes (top view)
Showing azimuth (0 degrees) and 30 degrees downtilt patterns (averaged patterns for all applicable antennas)

Hardware variants
AP-555: Internal antenna models
Wi-Fi radio specifications
AP type: Indoor, dual/tri-radio, 5GHz and 2.4GHz 802.11ax 4x4 MIMO
5GHz radio (dual-radio operation): Eight spatial stream HE80 (or 4SS HE160) MIMO for up to 4.8Gbps wireless data rate
5GHz radio (tri-radio operation): Four spatial stream HE80 (or 2SS HE160) MIMO for up to 2.4Gbps wireless data rate
2.4GHz radio: Four spatial stream HE40 (HE20) MIMO for up to 1,150Mbps wireless data rate
Support for up to 1,024 associated client devices per radio, and up to 16 BSSIDs per radio
Supported frequency bands (country-specific restrictions apply):

• 2.400 to 2.4835GHz (radio 1) ISM
• 5.150 to 5.250GHz (radio 0 and 0L) U-NII-1
• 5.250 to 5.350GHz (radio 0 and 0L) U-NII-2A
• 5.470 to 5.725GHz (radio 0 and 0U) U-NII-2C
• 5.725 to 5.850GHz (radio 0 and 0U) U-NII-3
• 5.850 to 5.895GHz (radio 0 and 0U) U-NII-4

Available channels: Dependent on configured regulatory domain
Dynamic frequency selection (DFS) optimizes the use of available RF spectrum

• Including Zero-Wait DFS (ZWDFS) to accelerate channel changes

Transmit power: Configurable in increments of 0.5dBm
Maximum (aggregate, conducted total) transmit power (limited by local regulatory requirements):
2.4GHz band: +24dBm (18dBm per chain)
5GHz band: +27dBm in dual-radio mode, +24dBm in tri- radio mode (18dBm per chain)
Note: conducted transmit power levels exclude antenna gain. For total (EIRP) transmit power, add antenna gain.
Advanced Cellular Coexistence (ACC) minimizes the impact of interference from cellular networks
Maximum ratio combining (MRC) for improved receiver performance
Cyclic delay/shift diversity (CDD/CSD) for improved downlink RF performance
Space-time block coding (STBC) for increased range and improved reception
Low-density parity check (LDPC) for high-efficiency error correction and increased throughput
Transmit beam-forming (TxBF) for increased signal reliability and range
Wi-Fi antennas
Integrated downtilt omni-directional antennas for 4x4 MIMO in 2.4GHz with peak antenna gain of 4.3dBi, and 8x8 MIMO in 5GHz with peak antenna gain of 5.8dBi in 5GHz. In tri-radio mode, the peak gain of the antennas for each of the 4x4 5GHz radios is 5.5dBi (radio 0L, lower half of 5GHz) and 5.6dBi (radio 0U, upper half of 5GHz). Built-in antennas are optimized for horizontal ceiling mounted orientation of the AP. The downtilt angle for maximum gain is roughly 30 degrees.
A mix of horizontally and vertically polarized antenna elements is used
Combining the patterns of each of the antennas of the MIMO radios, the peak gain of the combined, average pattern is 2.4dBi in 2.4GHz and 0.7dBi in 5GHz (dual- radio mode).
In tri-radio mode, the peak gain of the combined, average pattern is 1.1dBi (radio 0L, lower half of 5GHz) and 3.6dBi (radio 0U, upper half of 5GHz)
Other interfaces
E0, E1: HPE SmartRate port (RJ-45, maximum negotiated speed 5Gbps)
Auto-sensing link speed (100/1000/2500/5000BASE-T) and MDI/MDX
2.5Gbps and 5Gbps speeds comply with NBase-T and 802.3bz specifications
POE-PD: 48Vdc (nominal) 802.3af/at/bt POE (class 3 or higher)
802.3az Energy Efficient Ethernet (EEE)
Link aggregation (LACP) support between both network ports for redundancy and increased capacity
POE power can be drawn from either port (single source, or set to prioritize) or both ports simultaneously (set to combine). When set to prioritize, the AP draws power from E0 and may failover to E1.
DC power interface: 48Vdc (nominal, +/- 5%), accepts 1.35mm/3.5mm center-positive circular plug with 9.5mm length
USB 2.0 host interface (Type A connector)
Capable of sourcing up to 1A / 5W to an attached device
Bluetooth Low Energy (BLE5.0) and Zigbee (802.15.4)* radio
BLE: up to 8dBm transmit power (class 1) and -99dBm receive sensitivity (125kbps)
Zigbee: up to 8dBm transmit power and -97dBm receive sensitivity
A pair of integrated omnidirectional antennas (polarization diversity) with roughly 30 degrees downtilt and peak gain of 4.5dBi
Visual indictors (two multi-color LEDs): for System and Radio status
Reset button: factory reset, LED mode control (normal/off)
Serial console interface (proprietary, micro-B USB physical jack)
Kensington security slot
Mounting details
A mounting bracket has been pre-installed on the back of the AP. This bracket is used to secure the AP to any of the Aruba mount kits (sold separately); see the ordering Information section below for details.
Mechanical specifications
Dimensions/weight (AP-555; unit, excluding mount bracket):
260mm (W) x 260mm (D) x 61mm (H) / 10.2" (W) x 10.2" (D) x 2.3" (H)
1,570g / 55.4oz
Dimensions/weight (AP-555; shipping):
320mm (W) x 303mm (D) x 108mm (H) / 12.6" (W) x 11.9" (D) x 4.3" (H)
2,230g / 78.7oz
Certifications
UL2043 plenum rating
Wi-Fi Alliance:
Wi-Fi CERTIFIED a, b, g, n, ac
Wi-Fi CERTIFIED ax1
WPA, WPA2 and WPA3 – Enterprise with CNSA option, Personal (SAE), Enhanced Open (OWE)
WMM, WMM-PS, W-Fi Agile Multiband
Wi-Fi Location*
Passpoint (release 2)
Bluetooth SIG
Ethernet Alliance (POE, PD device, class 4)
Warranty
Aruba's hardware limited lifetime warranty