Technical Overview
Model: AIR-AP1840I-E-K9
Series: Cisco Aironet 1840
Regulatory Domain: E
Software Requirements
- Cisco Unified Wireless Network Software Release 8.8 MR2 or later
- Cisco IOS® XE Software Release 16.12 or later
Supported Wireless LAN Controllers
- Cisco Catalyst 9800 Series
- Cisco 3500, 5520, and 8540 Series Controllers
- Cisco Virtual Wireless Controller
- Cisco Mobility Express
Radio Capabilities
802.11n (Wi-Fi 4):
- 5 GHz: 4×4 MIMO with four spatial streams
- 2.4 GHz: 2×2 MIMO with two spatial streams
- Features: MRC, beamforming, DFS, CSD
- Channels: 20/40 MHz
- Data Rate: Up to 744 Mbps
- Aggregation: A-MPDU, A-MSDU
802.11ac (Wi-Fi 5):
- 4×4 MU-MIMO with four spatial streams
- Channels: 20/40/80 MHz
- Data Rate: Up to 1733 Mbps
- Features: Beamforming, MRC, DFS, CSD
- Aggregation: A-MPDU, A-MSDU
Antenna & Performance
Integrated Antennas:
- 2.4 GHz: 4 dBi peak gain
- 5 GHz: 5 dBi peak gain
- Pattern: Omnidirectional in azimuth
Interfaces
- 2x 10/100/1000BASE-T (RJ-45), PoE support
- 1x RJ-45 Console Port
- 1x USB 2.0 (enabled via future software update)
LED Indicator:
- Status for boot, association, and errors
Power Options
Input:
- 802.3at PoE+, Cisco UPOE
- Cisco Power Injector: AIR-PWRINJ6=
- 802.3af PoE (via AIR-PWRINJ5=; USB disabled under 802.3af)
Power Consumption:
- 13.2W at PSE (12.1W at PD) – USB off
- 17.8W at PSE (16.0W at PD) – USB on
Environmental Specifications
- Operating Temp: 0° to 50°C (32° to 122°F)
- Storage Temp: -30° to 70°C (-22° to 158°F)
- Operating Humidity: 10% to 90% (non-condensing)
- Altitude: Operating: up to 9843 ft at 40°C, Storage: up to 15,000 ft at 25°C
Memory
- 1 GB DRAM
- 256 MB Flash
Frequency Band & Channels (E Domain)
- 2.412–2.472 GHz: 13 channels
- 5.180–5.320 GHz: 8 channels
- 5.500–5.700 GHz: 8 channels (excluding 5.600–5.640 GHz)
