AIR-AP1852E-Z-K9C Cisco Aironet 1852e Indoor Controller-based AP

AIR-AP1852E-Z-K9C exact order identity

AIR-AP1852E-Z-K9C is a 1852e indoor access point for separately purchased external antennas in the Cisco Aironet 1850 Series. This exact SKU combines regulatory-domain token Z with a single-unit configurable K9C order. The platform is a dual-band 802.11ac Wave 2 access point with four 5 GHz spatial streams in single-user operation and three in multiuser operation.

Antenna and environmental boundary

Cisco states that external antennas are sold separately and certifies the platform for antenna gains up to 6 dBi at both 2.4 and 5 GHz. Record the approved Cisco antenna part numbers, four radio paths, gain, pattern, cable loss, connectors and mounting orientation. A compatible connector alone is not regulatory or RF-design evidence.

Order and controller boundary

Cisco lists K9C as a configurable controller-based order, and its lifecycle table describes affected K9C lines as Mobility Express products. Retain the final domain and software role on the quotation and received unit. Prove the intended controller or Mobility Express state instead of inferring it from the suffix alone.

Z regulatory-domain evidence

Cisco lists this profile as 2.4 GHz channels 1-11; 5 GHz blocks at 5.180-5.320, 5.500-5.700 excluding 5.600-5.640, and 5.745-5.825 GHz. The Z profile spans lower, middle and upper 5 GHz groups while retaining a documented gap in the middle group. That exclusion must survive controller template changes. Compare the live channel list with the Z-domain evidence after every initial join or controller migration. Treat an enabled channel inside the excluded range as a release blocker.

Procurement inference: lower, middle and upper groups provide broad planning options, but the documented middle gap remains a hard evidence point. Create a channel-list comparison that highlights the excluded range and retain it with the country lookup. After automatic channel changes or controller migration, repeat that comparison. Stable client service alone does not prove that the Z-domain constraints are still being enforced.

Power and interface boundary

The 1852 provides a PoE Gigabit uplink and a Gigabit AUX port for link aggregation. Cisco states that 802.3af disables AUX and USB on both antenna forms and reduces the 1852e 2.4 GHz radio from 3x4 to 2x3. Record negotiated power before promising the complete interface and radio state.

Deployment evidence worksheet

Controller join evidence

Stage the access point on the controller release intended for production. Retain the controller model, software version, discovery path, authorization method and first successful CAPWAP join. Confirm that configuration download completes and that both radios reach an expected operational state. Remove any temporary staging authorization before handover. This evidence separates an orderable access point from a unit that has actually been proven compatible with the planned controller environment. For this 1852 order, include the AireOS or Catalyst 9800 release actually used and note whether the unit is controller-managed or operating in an approved Mobility Express role.

Ethernet and cabling proof

Preserve the permanent-link test, patch-lead identities, switch port, negotiated Ethernet rate and error counters. Investigate pair faults, excessive length or rate fallback before wireless acceptance begins. A link light only proves connectivity at some rate; it does not demonstrate the intended uplink performance. Tie the cable result to the AP serial so a later throughput problem can be separated from radio, controller and wired-path causes. The platform has one PoE Gigabit interface and one Gigabit AUX interface used for link aggregation, so preserve both link states and the power condition under which AUX is available.

Survey-to-install reconciliation

Attach the approved RF survey location, mounting height, orientation, expected client density, channel width and neighboring-radio assumptions to the order. After installation, compare measured coverage and interference with that design. If ceiling construction, antenna placement or obstructions changed, document the deviation and repeat the affected measurements. This provides a site-specific acceptance reason for the exact unit instead of relying on a family data sheet alone. Relate the survey result to the 1852's 4x4:4 single-user and 4x4:3 multiuser 5 GHz design rather than treating the published 1.7 Gbps PHY rate as measured site throughput.

Serial-level asset control

Capture chassis serial, base MAC address, carton reference, deployment site, controller assignment and asset owner. Reconcile the identifiers against the purchase line before activation. Multi-unit cartons require an entry for every physical access point; a carton SKU alone cannot show which unit was installed, held as a spare or returned. This record is also needed to trace support entitlement, replacement history and monitoring ownership. If the product came from a ten-unit pack, the 1852 carton identity must be expanded into ten individual records before support, return or replacement handling.

Authentication path test

Commission representative clients through association, authentication, address assignment, DNS and application reachability. Preserve the identity policy used, test client type, result and relevant controller logs. An access point that joins its controller has not yet demonstrated the user path. Repeat the test after any controller, certificate or authentication-service change and retain failures separately from RF or switch-port evidence. Test the complete user path after the 1852 joins; the controller relationship alone does not prove client authentication, DHCP, DNS or application reachability.

Capacity observation

Define the expected concurrent clients, application mix, airtime utilization and channel-width assumptions for this location. After commissioning, capture radio utilization, retry behavior and representative throughput during a meaningful load period. Compare the observation with the survey design and state any shortfall. A peak link rate from a data sheet is not a site capacity result and should not replace measured operating evidence. Capacity acceptance should show actual client mix, airtime and retries under the available regulatory-domain channels, not only a maximum PHY figure.

Replacement dependency map

Map this unit to controller, licenses, authentication services, switch power, cable, bracket, antenna design and monitoring objects. For an end-of-sale platform, state which dependencies can be reused by the planned Catalyst migration and which require change. A nominal access-point replacement can fail when the surrounding platform was never inventoried. Keep the map with the asset rather than only in a one-time project file. Cisco names the Catalyst 9115AX family as the migration option in the lifecycle bulletin; map controller, power, cabling, mount and antenna changes before replacement.

Handover completeness

The handover package should include exact order identity, destination approval, serial record, controller evidence, switch port, mounting or antenna record, user-path tests and named operational owners. Review the package with the receiving team and list unresolved exceptions. A unit is not operationally accepted when important evidence remains only in installer notes, email attachments or an unowned temporary dashboard. The final handover should include the exact PID, regulatory approval, serial, antenna or mounting record, power mode, both Ethernet interfaces and lifecycle owner.

Lifecycle decision

Cisco ended sale of the Aironet 1850 Series on 1 May 2022, ended software maintenance on 1 May 2023 and lists 30 April 2027 as the last support date. Cisco identifies Catalyst 9115AX as the migration family. Available inventory does not extend those milestones.

Related Aironet 1852 order records

• AIR-AP1852I-Z-K9 - compare antenna form and domain evidence.
• AIR-AP1852I-C-K9 - compare antenna form and domain evidence.
• AIR-AP1852I-SK910C - compare antenna form and domain evidence.

Official evidence: Cisco Aironet 1850 Series data sheet; Cisco Aironet 1850 hardware guide; Cisco Aironet 1850 lifecycle bulletin; and Cisco wireless compliance tool.