Cisco Catalyst 9120AXI Wi-Fi 6 4x4 Access Point, Internal Antenna
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PRODUCT DESCRIPTION
Cisco Catalyst 9120AX Series Wi-Fi 6 Access Point, Internal Antenna (C9120AXI-S) — Local Warranty
Enterprise Wi-Fi 6 for busy indoor spaces
The Cisco Catalyst 9120AXI (C9120AXI-S) is a Wi-Fi 6 (802.11ax) indoor access point with internal antennas, built for offices, classrooms, clinics and other mid- to high-density environments. Cisco rates it at PHY data rates up to 5.38 Gbps (160 MHz on 5 GHz plus 20 MHz on 2.4 GHz), using 4x4 MIMO radios on both bands.
4x4:4 radios with Flexible Radio Assignment
Both radios support four spatial streams. With Flexible Radio Assignment, the AP can run in standard 2.4 GHz + 5 GHz mode or switch to dual 5 GHz mode, where both radios serve clients on 5 GHz; Cisco quotes 5.2 Gbps (2 x 2.6 Gbps) over-the-air in dual 5 GHz mode. The radio role can be set by the controller based on the RF environment.
Wi-Fi 6 efficiency features
Uplink and downlink OFDMA, downlink MU-MIMO, BSS colouring, spatial reuse and Target Wake Time (TWT) let the AP serve many clients at once and help battery-powered devices save power. 802.11a/b/g/n/ac clients continue to connect normally.
Cisco RF ASIC and CleanAir
A dedicated Cisco RF ASIC acts as a software-defined radio for spectrum analysis, giving CleanAir interference detection, wireless intrusion prevention and off-channel RF monitoring without taking a client-serving radio offline. Intelligent Capture can provide packet-level analysis to Cisco Catalyst Center (formerly DNA Center).
Multigigabit uplink, IoT ready
A single 100/1000/2500 Mbps multigigabit Ethernet port lets the AP pass more than 1 Gbps to a compatible mGig switch over existing Cat5e/Cat6 cabling. An integrated Bluetooth Low Energy 5 radio and a USB 2.0 port (4.5 W) support location services and IoT add-ons.
Singapore regulatory domain (-S)
This is the -S variant, the Cisco regulatory domain supplied for Singapore, so channels and transmit power match local rules when joined to a correctly configured controller.
Cisco Catalyst 9120AX Datasheet — Technical Specifications
Radios
| Wireless standard | IEEE 802.11ax (Wi-Fi 6), backward compatible with 802.11a/b/g/n/ac |
| 2.4 GHz radio | 4x4 MIMO, four spatial streams (flexible radio) |
| 5 GHz radio | 4x4 MIMO, four spatial streams |
| Flexible Radio Assignment | 2.4 GHz + 5 GHz mode, or dual 5 GHz mode (both radios serving clients on 5 GHz) |
| Maximum PHY data rate | Up to 5.38 Gbps (160 MHz on 5 GHz + 20 MHz on 2.4 GHz) |
| Dual 5 GHz over-the-air rate | 5.2 Gbps (2 x 2.6 Gbps) |
| Channel widths | 20, 40, 80 and 160 MHz |
| 802.11ax features | UL/DL OFDMA, MU-MIMO, BSS colouring, spatial reuse, Target Wake Time |
Antennas
| Type | Internal (C9120AXI) |
| 2.4 GHz peak gain | 4 dBi, omnidirectional in azimuth |
| 5 GHz peak gain | 5 dBi, omnidirectional in azimuth |
RF Intelligence
| Cisco RF ASIC | Integrated software-defined radio for spectrum analysis |
| CleanAir | Supported via RF ASIC |
| Intelligent Capture | Supported with Cisco Catalyst Center (formerly DNA Center) |
| Bluetooth | Integrated Bluetooth Low Energy 5 radio |
Interfaces
| Ethernet | 1 x 100/1000/2500 Mbps multigigabit Ethernet (RJ-45), auto-MDIX |
| Console | RJ-45 management console port |
| USB | USB 2.0 at 4.5 W |
Power
| 802.3at PoE+ | Full function, 4x4 on both radios, 2.5G link; max 25.5 W |
| 802.3af PoE | Reduced operation, 1G link, USB off; max 13.4 W |
| Thermal note | Above 40°C ambient the AP shifts from 4x4 to 2x2 on both radios |
| Power injectors | AIR-PWRINJ6= (802.3at), AIR-PWRINJ5= (802.3af only), sold separately |
Physical & Environmental
| Dimensions (W x L x H) | 21.6 x 21.6 x 4.3 cm (8.5 x 8.5 x 1.7 in.) |
| Weight | 1.3 kg (2.87 lb) |
| Operating temperature | 0° to 50°C (32° to 122°F) |
| Operating humidity | 10% to 90% non-condensing |
| Memory | 2048 MB DRAM, 1024 MB flash |
Compatibility & Software Support
Controllers and management
Cisco Catalyst 9800 Series Wireless Controllers (Cisco IOS XE 16.11 with AP Device Pack or later). Cisco's datasheet also lists AireOS 8.9.x or later on the Cisco 3504, 5520 and 8540 controllers. Assurance and Intelligent Capture use Cisco Catalyst Center (formerly DNA Center).
Embedded Wireless Controller
Cisco has separately announced end-of-sale for the Embedded Wireless Controller (EWC) software running on Catalyst 9100 Wi-Fi 6 access points: end-of-sale 29 November 2024, last date of support 30 November 2029, with IOS XE 17.15.x as the final supported release. This affects the controller-on-AP capability only, not the access point hardware; Cisco's recommended path is to run the AP in lightweight (CAPWAP) mode with a Catalyst 9800 controller, or move to a Meraki cloud-managed deployment.
Regulatory domain
The -S suffix is the Cisco regulatory-domain variant supplied for Singapore. The regulatory domain fixes the permitted channels and transmit power, so the unit must join a controller configured for the matching country code; Cisco does not support moving an AP to a different regulatory domain.
End-of-Sale notice
Cisco has published the "End-of-Sale and End-of-Life Announcement for the Cisco and Meraki Wi-Fi 6 Indoor Access Points" (announced 30 March 2026), which covers C9120AXI-S. Milestones: End-of-Sale 31 December 2026; Last Ship Date 31 March 2027; End of SW Maintenance Releases 31 December 2027; End of Vulnerability/Security Support 31 December 2031; Last Date of Support 31 December 2031. Cisco names the Cisco Wireless 9176I Access Point as the migration product. Units bought before end-of-sale remain covered by Cisco support until the last date of support.
Warranty
Local Singapore unit with local warranty. Cisco's datasheet lists a limited lifetime hardware warranty for the Catalyst 9100 access points. For warranty claims, keep your SourceIT invoice as proof of purchase.
Package Contents & Catalyst 9100 Access Point Ordering Information
What the Part Number Covers
C9120AXI-S is the access point with internal antennas for the -S regulatory domain. Cisco lists mounting hardware, PoE injectors and controller licensing as separate orderable items, and does not publish an in-the-box list in the datasheet.
Catalyst 9100 Access Point Family
| Model | Key difference |
| Catalyst 9105AXI (C9105AXI-S) | 2x2:2 on both bands, 1 GbE uplink, 802.3af PoE, compact 150 mm housing |
| Catalyst 9115AXI (C9115AXI-S) | 4x4:4 on both bands, 2.5 GbE mGig uplink, BLE 5, USB 2.0 |
| Catalyst 9120AXI (C9120AXI-S) (this listing) | 4x4:4, Cisco RF ASIC with CleanAir, Flexible Radio Assignment (dual 5 GHz), 2.5 GbE mGig |
| Catalyst 9130AXI (C9130AXI-S) | 8x8:8 on 5 GHz plus 4x4:4 on 2.4 GHz, tri-radio mode, 5 GbE mGig, Cisco RF ASIC |
| Cisco Wireless 9171I / 9174I / 9176I | Wi-Fi 7 successors named in the Cisco end-of-sale notice (not listed on SourceIT) |
Datasheet & Downloads
Frequently Asked Questions — Cisco Catalyst 9120AX
Does the C9120AXI-S need a wireless controller?
Yes for new deployments. Cisco's supported path is a Catalyst 9800 Series controller (appliance, embedded on a Catalyst 9000 switch, or virtual 9800-CL). The on-AP Embedded Wireless Controller option reached end-of-sale on 29 November 2024.
Will it run at full speed on standard PoE?
Full 4x4 operation on both radios with the 2.5G link needs 802.3at PoE+ (max 25.5 W). On 802.3af the AP runs in reduced mode with a 1G link and the USB port disabled.
What switch port should I use?
A multigigabit (2.5 GbE) PoE+ port lets the AP pass more than 1 Gbps; a standard Gigabit PoE+ port also works, capped at 1 Gbps uplink.
Is the Catalyst 9120AX end-of-sale?
Cisco has announced end-of-sale for C9120AXI-S on 31 December 2026, with support until 31 December 2031. Cisco names the Wireless 9176I as the migration product.
Can I use this AP outside Singapore?
The -S unit is built for its regulatory domain. Cisco does not support changing an AP's regulatory domain, so order the correct suffix for the country of installation.
