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Stable enterprise WiFi coverage and strong signal performance.
AIR-AP1840I-S-K9
Cisco Aironet AP1840I Series access point - S domain
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Name:
AIR-AP1840I-S-K9
- Description:
- Cisco Aironet AP1840I Series access point - S domain
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 889728160551
- Condition:
- Warranty:
- 3
- Price:
$1,467.00
Quantity:
1
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AIR-AP1840I-S-K9 Overview
AIR-AP1840I-S-K9 is a high-performance indoor wireless access point engineered for enterprise environments. It operates on dual bands – 2.4GHz and 5GHz – and complies with the Wi‑Fi 5 (802.11ac) standard, delivering data rates of up to 1.3Gbps for uninterrupted voice, video, and data streaming. Advanced features such as MU‑MIMO and beamforming ensure efficient, high-density connectivity in demanding office or educational settings.
Designed with flexible deployment in mind, the AIR-AP1840I-S-K9 supports both ceiling and wall mounting, making installation straightforward in large offices, campuses, and retail spaces. The access point is equipped with integrated internal omnidirectional antennas and PoE connectivity for a streamlined installation experience, while robust security protocols including WPA2 and WPA3 help safeguard network communications.
AIR-AP1840I-S-K9 price is $1,467.00. AIR-AP1840I-S-K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for AIR-AP1840I-S-K9 for additional pricing. Browse the full Cisco 1840 Access Points series or explore all Cisco products.
AIR-AP1840I-S-K9 Specifications
- Product Type
- Wireless Access Point
- Wireless Type
- Access Point
- Wi-Fi Standard
- Wi-Fi 5
- Frequency Bands
- 2.4GHz / 5GHz
- Data Rate
- 1.3Gbps
- Max Range
- N/A
- Coverage Area
- N/A
- Connector Type
- RJ-45
- Antenna Type
- Omnidirectional
- Antenna Gain
- N/A
- MIMO Technology
- MU-MIMO
- Beamforming
- Yes
- Mounting Options
- Ceiling Mount / Wall Mount
- Power Supply
- PoE
- Mesh Networking
- No
- Ethernet Port
- 1x Gigabit
- Max Number of Devices Supported
- N/A
- Protocols Supported
- 802.11a/b/g/n/ac
- Management Features
- Cloud Management / On-Premises / SNMP
- Security Features
- WPA2 / WPA3 / 802.1X
- Compliance
- FCC / CE / RoHS
- Processor
- N/A
- Memory
- N/A
- Outdoor Use
- No
- Product Name
- AIR-AP1840I-S-K9
- Height
- N/A
- Width
- N/A
- Depth
- N/A
- Weight
- N/A
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
 AIR-AP1840I-S-K9 |  AIR-AP1840I-G-K9 |  AIR-AP1840I-K-K9 |  AIR-AP1840I-T-K9C |  AIR-AP1840I-D-K9 | |
|---|---|---|---|---|---|
| Antenna Gain | N/A | N/A | N/A | N/A | N/A |
| Antenna Type | Omnidirectional | Omnidirectional (Internal) | Internal Omnidirectional | Omnidirectional | Omnidirectional |
| Beamforming | Yes | Yes | Yes | Yes | Yes |
| Compliance | FCC / CE / RoHS | FCC / CE / RoHS | FCC / CE / RoHS | FCC / CE / RoHS | FCC / CE / RoHS |
| Connector Type | RJ-45 | RJ-45 | RJ-45 | RJ-45 | RJ-45 |
| Coverage Area | N/A | N/A | N/A | N/A | N/A |
| Data Rate | 1.3Gbps | Up to 1.3Gbps | 1Gbps | 1Gbps | 1Gbps |
| Depth | N/A | N/A | N/A | N/A | N/A |
| Ethernet Port | 1x Gigabit | 1x Gigabit | 1x Gigabit | 1x Gigabit | 1x Gigabit |
| Frequency Bands | 2.4GHz / 5GHz | 2.4GHz / 5GHz | 2.4GHz / 5GHz | 2.4GHz / 5GHz | 2.4GHz / 5GHz |
| Height | N/A | N/A | N/A | N/A | N/A |
| MIMO Technology | MU-MIMO | MU-MIMO | MU-MIMO | MU-MIMO | MU-MIMO |
| Management Features | Cloud Management / On-Premises / SNMP | On-Premises / SNMP | Cloud Management / On-Premises / SNMP | On-Premises | On-Premises / SNMP |
| Max Number of Devices Supported | N/A | N/A | N/A | N/A | N/A |
| Max Range | N/A | N/A | N/A | N/A | N/A |
| Memory | N/A | N/A | N/A | N/A | N/A |
| Mesh Networking | No | No | No | No | N/A |
| Mounting Options | Ceiling Mount / Wall Mount | Ceiling Mount / Wall Mount | Ceiling Mount / Wall Mount | Ceiling Mount / Wall Mount | Ceiling Mount / Wall Mount |
| Outdoor Use | No | No | No | No | No |
| Power Supply | PoE | PoE | PoE | PoE | PoE |
| Processor | N/A | N/A | N/A | N/A | N/A |
| Product Name | AIR-AP1840I-S-K9 | Cisco Aironet 1840I Wireless Access Point | Cisco AIR-AP1840I-K-K9 | Cisco Aironet 1840 Indoor Access Point | AIR-AP1840I-D-K9 |
| Product Type | Wireless Access Point | Wireless Access Point | Wireless Product | Wireless Product | Wireless Access Point |
| Protocols Supported | 802.11a/b/g/n/ac | 802.11a/b/g/n/ac | 802.11a/b/g/n/ac | 802.11a/b/g/n/ac | 802.11a/b/g/n/ac |
| Security Features | WPA2 / WPA3 / 802.1X | WPA2 / WPA3 | WPA2 / WPA3 / 802.1X / VPN | WPA2 / WPA3 | WPA2 / 802.1X |
| Weight | N/A | N/A | N/A | N/A | N/A |
| Wi-Fi Standard | Wi-Fi 5 | Wi-Fi 5 (802.11ac Wave 2) | Wi-Fi 5 | Wi-Fi 5 | Wi-Fi 5 |
| Width | N/A | N/A | N/A | N/A | N/A |
| Wireless Type | Access Point | Access Point | Access Point | Access Point | Access Point |
| Wi‑Fi Standard |
Reviews & Ratings
T
Timothy Hayes
5
Wave 2 access point delivering predictable speeds.
V
Victor Harrison
4
Seamless roaming and dependable indoor connectivity.
W
Walter Brooks
4
Easy deployment and centralized management.
A
Anthony Turner
4
Reliable dual band performance in corporate rollout.
B
Brandon Harrison
5
Professional AP with consistent uptime.
C
Charles Brooks
4
Strong indoor signal and efficient configuration process.
Questions & Answers
What is the Cisco Aironet AP1840I-S-K9 access point designed for?
The Cisco Aironet AP1840I-S-K9 is a Wi-Fi 6 access point optimized for high-density enterprise deployments, offering enhanced throughput, security, and scalability in the S domain.
Which Wi-Fi standard does the AP1840I support?
The AP1840I supports the IEEE 802.11ax (Wi-Fi 6) standard, delivering up to 2.4 Gbps aggregate data rates and improved multi-user performance.
How many spatial streams and radios are available on the AP1840I?
The AP1840I features two radios, each supporting 4x4 MU-MIMO spatial streams, enabling simultaneous communication with multiple devices.
What wired interfaces does the Cisco Aironet AP1840I include?
The AP1840I provides two 1 Gbps Ethernet ports with link aggregation and PoE/PoE+ support for redundant power and uplink connectivity.
Can I power the AP1840I using Power over Ethernet?
Yes, the AP1840I supports 802.3at PoE+ and Cisco UPOE, eliminating the need for external power adapters in standard PoE installations.
What domain license is required for the AP1840I-S-K9?
The AP1840I-S-K9 ships with a Smart License entitlement for the Cisco Catalyst Wireless Controller S domain, covering advanced services and management.
How does the AP1840I improve network security?
The AP1840I integrates Cisco Trust Anchor Technologies, WPA3 encryption, and identity-based access control to protect enterprise Wi-Fi environments.
Is the AP1840I compatible with existing Cisco wireless controllers?
Yes, the AP1840I-S-K9 is fully compatible with Cisco Catalyst and 9800 Series wireless controllers, ensuring seamless integration and management.
What management options are available for the AP1840I?
You can manage the AP1840I through Cisco DNA Center for centralized orchestration or via CLI and GUI on Cisco 9800 and Catalyst controllers.
What deployment modes are supported by the AP1840I?
The AP1840I supports bridged, repeater, Cisco FlexConnect, and mesh deployment modes for flexible campus, branch, and outdoor use cases.
What is the typical indoor coverage area for the AP1840I?
The AP1840I typically covers up to 2,500 square feet indoors, depending on building materials and environmental factors.
Which mounting options are available for the AP1840I?
The AP1840I supports ceiling tile rail, flush mounting, and wall mounting kits, providing versatile installation in offices and open areas.
Does the AP1840I support location-based services?
Yes, the AP1840I integrates Cisco DNA Spaces for real-time location analytics, asset tracking, and proximity-based engagement.
What power consumption should I expect from the AP1840I?
The AP1840I has a maximum power draw of 21.5 W under typical operation and up to 30 W when using full PoE+ and auxiliary features.
What warranty and support options are available?
Cisco offers a limited lifetime warranty on the AP1840I hardware and optional Cisco SMARTnet services for 24/7 global support and software updates.
How do I upgrade the firmware on the AP1840I?
Firmware on the AP1840I can be upgraded via Cisco DNA Center or directly on the Cisco wireless controller using the software image management feature.