Wi-Fi Standard: IEEE 802.11ax (Wi-Fi 6/6E); legacy 802.11a/b/g/n/ac also supported
Spatial Streams (MIMO): 4x4:4 on each of the three radios (2.4 GHz, 5 GHz, 6 GHz); 12 spatial streams total for MU-MIMO
Aggregate Throughput: 7.78 Gbps tri-radio PHY maximum (4x4 160 MHz on 6 GHz, 4x4 80 MHz on 5 GHz, 4x4 20 MHz on 2.4 GHz); Cisco notes this is a radio frame-rate capability and may exceed 802.11ax-allowed rates, so real-world throughput is lower
Radios (bands): Tri-radio: 2.4 GHz 4x4, 5 GHz 4x4 plus a secondary XOR radio, 6 GHz 4x4 (LPI); dedicated Bluetooth 5.1 (BLE) radio
Uplink Port Speed: 1x multigigabit Ethernet RJ-45 (100M/1G/2.5G/5G)
Max Clients: Not published in Cisco datasheet (Cisco states higher client density than typical enterprise APs, without a number)
PoE Requirement: 802.3bt (UPOE) 30.5 W for full operation (USB 4.5 W); 802.3at 25.5 W (no USB, reduced operation); 802.3af 14.0 W for configuration staging only with radios off; optional 54 V DC input via MA-PWR-50WAC
Form Factor: Indoor ceiling/wall-mount AP; 9.5 x 9.5 x 2.2 in (241.3 x 241.3 x 56.9 mm) for CW9166I; 3.54 lb (1.60 kg)
Management: On-premises (IOS XE / Catalyst 9800) or cloud via Meraki Dashboard (CW9166I-MR / CW9166D1-MR)
Curation Review
✔ Pros:Tri-band Wi-Fi 6E with dedicated 6 GHz radio for less congested high-capacity spectrum; Four 4x4 spatial streams per band with 7.78 Gbps tri-radio PHY capability; Multigigabit uplink up to 5 Gbps for higher aggregate throughput than 1 GbE APs; Dedicated Bluetooth 5.1 radio for IoT and asset-tracking use; Cisco Trust Anchor, Secure Boot and image signing for hardware-level security; Flexible management: on-premises Catalyst 9800 or cloud-managed Meraki variant; Directional (D1) and omni (I) antenna SKUs for different coverage designs
✘ Cons:Full performance requires 802.3bt (30.5 W) PoE; 802.3at switches limit USB and radio operation; Max client count is not published, so capacity planning relies on third-party or community estimates; Uplink tops out at 5 Gbps, which can bottleneck a 7.78 Gbps radio capability at high load; Price is high relative to many 802.11ax APs, with reseller prices spanning roughly $1,100 to $3,300; Multiple SKUs (I vs D1, -ROW/regional, IOS XE vs Meraki-MR) complicate ordering and comparison; Minimum IOS XE version differs by SKU and reseller listings conflict
Est. Price:
$1,136 - $3,317
Compare Against
Cisco Catalyst 9178i
★ 4.3 Value Score
Technical Specifications
Wi-Fi Standard: Wi-Fi 7 (802.11be)
Spatial Streams (MIMO): 4x4 MU-MIMO per client-serving radio (4 spatial streams per radio)
Radios (bands): 4 client-serving radios: tri-band 2.4 GHz / 5 GHz / 6 GHz with a 4th radio (quad-radio design)
Uplink Port Speed: 2x 10 Gbps mGig ports (multi-gigabit Ethernet)
Max Clients: 1200 (400 per radio)
PoE Requirement: 802.3bt (PoE++) required for full operation; 802.3at/af supports reduced functionality; draws approx. 30-52 W
Curation Review
✔ Pros:Wi-Fi 7 with tri-band 2.4/5/6 GHz and 4x4 MU-MIMO on every radio; 24 Gbps aggregate throughput for high-density environments; dual 10 Gbps mGig uplinks avoid a 1 Gbps bottleneck; rated for up to 1200 clients; supports 802.3bt PoE on the mGig ports with at/af fallback; manageable from Catalyst 9800 WLC/Catalyst Center or Meraki cloud depending on SKU
✘ Cons:Requires 802.3bt PoE for full functionality, which raises switch and injector cost; needs Catalyst 9800 controller running IOS XE 17.15.2 or later for the Catalyst SKU; Wi-Fi 7 benefits need Wi-Fi 7 clients to be realized; list pricing varies widely by reseller and SKU (CFG vs Global vs RTG), and reseller spec figures differ in places; cloud-managed (Meraki) deployment requires separate licensing; premium cost compared with Wi-Fi 6E alternatives
