AIR-AP1840I-H-K9 Cisco Aironet 1840I Indoor 4x4:4 MU-MIMO Access Point

AIR-AP1840I-H-K9 H-Domain Deployment Gate

AIR-AP1840I-H-K9 is the H-domain Cisco Aironet 1840: an indoor dual-band 802.11ac Wave 2 AP with internal antennas, controller-based ordering and two Gigabit Ethernet interfaces.

H-domain radio evidence

The official 20 MHz table specifies thirteen channels at 2.412-2.472 GHz, eight at 5.180-5.320 GHz and five at 5.745-5.825 GHz. Use Cisco's current compliance tool for the installation address; a matching frequency range alone does not establish legal deployment.

Mounting and RF acceptance

The enclosure is 7 x 7 x 1.5 inches without brackets and weighs 0.94 lb. Cisco lists 4 dBi peak internal-antenna gain at 2.4 GHz and 5 dBi at 5 GHz. Preserve bracket PID, mounting orientation, ceiling material, survey target and post-install coverage results with the AP serial.

Power-path verification

Validate both switch-port cabling and power before controller testing. Cisco records 13.2W PSE draw with all features except USB and 17.8W with USB. If powered by 802.3af, USB is off; that constraint should appear in the acceptance report.

Controller and replacement status

This is -K9, so do not present it as the -K9C factory Mobility Express option. Confirm the supported controller release and regulatory country code. Cisco's sale ended 30 April 2022 and support ends 30 April 2027; Catalyst 9115AX is the documented migration family.

Use AIR-AP1840I-F-K9 or AIR-AP1840I-K-K9 only after the destination's regulatory approval and physical PID have been reconciled.

Official evidence: Cisco H-domain spectrum, antenna and power specifications, Cisco mounting and model-number guide, Cisco controller compatibility matrix and Cisco end-of-life bulletin.