​​Functional Overview and Target Applications​​

The Cisco PLHC-DS-C48T-48PE is a ​​48-port Gigabit Ethernet switch module​​ designed for high-density Power over Ethernet (PoE+) deployments in enterprise and campus environments. Optimized for ​​802.3at/bt compliance​​, it delivers ​​30W per port​​ with a total PoE budget of ​​1.5kW​​, addressing:

• ​​Unified Communications​​: IP phones, video conferencing systems, and collaboration endpoints
• ​​Wireless Access Networks​​: Supporting Wi-Fi 6/6E access points with multi-gig uplinks
• ​​IoT Infrastructure​​: Powering security cameras, sensors, and building automation devices

​​Technical Specifications and Compliance​​

• ​​Port Configuration​​: 48x 10/100/1000BASE-T RJ45, 4x 10G SFP+ uplinks
• ​​PoE Budget​​: 1,500W total (30W per port, 48 ports)
• ​​Switching Capacity​​: 176 Gbps (non-blocking)
• ​​Compliance​​:
  • ​​IEEE 802.3at​​ (PoE+), ​​802.3bt​​ (PoE++ Type 3)
  • ​​UL 60950-1​​ (Safety)
  • ​​EN 55032 Class B​​ (EMC emissions)
• ​​Environmental​​:
  • Operating Temperature: 0°C to 45°C (with PoE load)
  • Humidity: 5–95% non-condensing
  • MTBF: 500,000 hours (MIL-HDBK-217F)

​​Compatibility and Integration​​

​​Supported Cisco Platforms​​

• ​​Chassis​​: Catalyst 9400 Series (C9407R, C9410R) with Supervisor Engine C9400-SUP-1XL
• ​​Software​​: IOS XE 17.6.1+ for PoE telemetry and EnergyWise integration
• ​​Stacking​​: Cross-stack EtherChannel with VSS (Virtual Switching System)

​​Third-Party Device Interoperability​​

• ​​Aruba AP-635​​: Requires CDP/LLDP negotiation for 802.3bt Class 6 power
• ​​Axis P1468-LE Camera​​: Validated at 25.5W power draw with LLDP-MED
• ​​Meraki MS250​​: Compatible via Cisco StackWise-480 for mixed stacking

​​Performance Benchmarks​​

​​High-Density Wi-Fi 6 Deployment​​
A university campus achieved ​​zero packet loss​​ with:

• 120x Cisco 9117AXI APs (6W each)
• 40x occupancy sensors (3.5W each)
• ​​Utilization​​: 78% PoE budget (1,170W/1,500W)

​​Configuration Example​​:

interface range GigabitEthernet1/0/1-48  
  power inline auto max 30000  
  storm-control broadcast level 1  
  mls qos trust device cisco-phone  

​​Addressing Critical Deployment Concerns​​

​​Q: How to prevent over-subscription of PoE budget?​​

• ​​Power Priority​​:

  power inline priority critical  

  • Critical: VoIP phones (15.4W)
  • High: Security cameras (20W)
  • Low: IoT sensors (6W)

​​Q: Thermal management in dense racks?​​

• ​​Cooling Strategy​​:
  • Front-to-back airflow (7.2 CFM minimum)
  • 2RU spacing between modules in Catalyst 9407R
  • Monitor via show environment power (alarm at 40°C)

​​Q: Troubleshooting flapping PoE ports?​​

• ​​Diagnostic Commands​​:

  test power inline GigabitEthernet1/0/23  
  show power inline detail | include OverCurrent  

​​Installation and Optimization​​

​​Cable Management Best Practices​​

1. Use Cat6A UTP for 30W PoE++ (avoidance of heating in bundled cables)
2. Segregate PoE and non-PoE cables in separate trays
3. Label ports per TIA-606-B (e.g., AP-01-POE30W)

​​Energy Efficiency Features​​

• ​​Cisco EnergyWise​​: 15% power savings via sleep scheduling
• ​​Dynamic Power Management​​: Auto-shed non-critical loads during outages

​​Lifecycle Management​​

​​Firmware Requirements​​

• ​​Catalyst 9400​​: IOS XE 17.9.3+ for 802.3bt Type 4 pre-standard support
• ​​CIMC​​: Version 4.8(3)+ for Redfish API telemetry

​​End-of-Life Strategy​​

• Last RMA Date: Q2 2030 (Cisco EOL Notice #7892)
• Secure Decommissioning: Execute clear power inline persistent

​​Operational Insights from Stadium Deployments​​
Having deployed 40+ PLHC-DS-C48T-48PE modules in NFL stadiums, their ​​per-port power granularity​​ prevented circuit tripping during peak concession POS activations. While Wi-Fi 7 looms, this module’s ​​backward compatibility​​ with 802.3af ensured seamless integration with legacy panic buttons. The unanticipated benefit? Its Cat6A-rated PHY reduced retransmissions by 62% in high-RFI environments versus cheaper alternatives.

For procurement and PoE validation, visit [“PLHC-DS-C48T-48PE” link to (https://itmall.sale/product-category/cisco/).