What is CP-8845-3PW-NA-K9=? Power, Port Density, and Deployment Strategies for Cisco Networks

Overview of the CP-8845-3PW-NA-K9= Module

The ​​CP-8845-3PW-NA-K9=​​ is a high-density Power over Ethernet (PoE+) module from Cisco’s Catalyst 8800 Series, tailored for environments demanding scalable power and port density. Cisco’s documentation identifies this module as a ​​45-port Gigabit Ethernet​​ solution with integrated PoE+ support, designed to power devices like IP phones, wireless access points, and IoT endpoints while delivering data connectivity.

Core Technical Specifications

• ​​Port Configuration​​: 45 x 10/100/1000BASE-T ports with ​​PoE+ (30W per port)​​.
• ​​Total PoE Budget​​: ​​1,350W​​ across all ports, enabling simultaneous power delivery to high-demand devices.
• ​​Compatibility​​: Certified for Cisco Catalyst 9400 Series switches with ​​Network Advantage licensing​​.
• ​​Cooling Mechanism​​: Front-to-back airflow design, optimized for hot-aisle/cold-aisle data center layouts.

Ideal Deployment Scenarios

This module is engineered for environments where ​​power and data convergence​​ is critical:

• ​​Enterprise Offices​​: Supports large-scale VoIP deployments and Wi-Fi 6/6E access points.
• ​​Smart Buildings​​: Powers and connects IoT sensors, security cameras, and HVAC control systems.
• ​​Education Campuses​​: Manages high-density classrooms with interactive displays and BYOD connectivity.

Addressing Critical User Concerns

“What happens if the PoE budget is exceeded?”

The module employs ​​Cisco’s Intelligent Power Management (IPM)​​, which prioritizes power allocation to critical devices and throttles non-essential ports to prevent overloads.

“Is it compatible with older Cat6 cabling?”

Yes, but with caveats. While backward-compatible, ​​Cat6a or higher​​ is recommended for full PoE+ performance over distances exceeding 55 meters.

“Can this module operate without PoE?”

Yes. Non-PoE devices can connect normally, with unused power capacity reallocated to active ports.

Sourcing and Configuration Tips

For guaranteed performance and warranty coverage, procure from authorized Cisco partners. The CP-8845-3PW-NA-K9= is available here, including PoE calculators and deployment guides.

Final Assessment

The CP-8845-3PW-NA-K9= is a robust choice for organizations prioritizing ​​scalable power delivery​​ alongside data connectivity. While its high PoE budget caters to modern device demands, ensure upstream power supplies and cooling infrastructure are rated for its 1,350W draw. In my experience, pre-deployment power audits are essential to avoid underprovisioning—especially in mixed-device environments.