AIR-AP1852I-D-K9C Cisco Aironet 1852i 4x4 MIMO Access Point

AIR-AP1852I-D-K9C D-Domain Installation Record

AIR-AP1852I-D-K9C identifies the D-domain Mobility Express form of the internal-antenna Aironet 1852i. It supports three spatial streams at 2.4 GHz and four at 5 GHz, with one PoE Gigabit port plus an AUX Gigabit port.

D-domain avoids the middle DFS block

The D row in Cisco's table contains 2.412-2.462 GHz, eight 5 GHz channels from 5.180-5.320 GHz and five from 5.745-5.825 GHz. It does not list a 5.500-5.700 GHz block. Validate the controller country and local approval rather than copying the broader AIR-AP1852I-Z-K9C plan.

Mobility Express continuity test

Cisco identifies K9C models as factory-shipped with Mobility Express. For replacement stock, record image version, country, primary election, managed AP count, client count and backup checksum. Confirm that the unit can resume the intended primary role and that configuration rollback is understood.

Power-mode commissioning

The AUX and USB interfaces are unavailable when 802.3af supplies the 1852i. Check power negotiation before testing LAG, then log both link states, PoE source, radio status, bracket condition and coverage at the intended mounting position.

Support cutoff

This exact D-domain K9C PID appears in Cisco's retirement bulletin. Service-contract renewal ends 27 July 2026 and last support is 30 April 2027. Treat controller compatibility and migration to the Catalyst 9115AX family as purchase gates.

Official evidence: Cisco D-domain spectrum and reduced-power behavior, Cisco Mobility Express identity and mounting guide, Cisco exact D-domain retirement row and Cisco regulatory approval lookup.