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Technical Profile of the C1121-4P
The C1121-4P is a Cisco Industrial IoT Router engineered for environments demanding high availability and Power over Ethernet (PoE) in harsh conditions. It combines 4x Gigabit Ethernet PoE+ ports, dual LTE-Advanced cellular modems, and Cisco IOS-XE SD-WAN capabilities, making it a versatile solution for sites requiring both wired and wireless failover. Built to IP67 standards, it operates in temperatures from -40°C to 75°C and resists dust, moisture, and vibrations.
Key Features Addressing Industrial Demands
- Robust PoE+ Support: Delivers up to 120W total PoE power (30W per port), powering devices like industrial cameras, wireless APs, and sensors without external injectors.
- Dual LTE-A Connectivity: Ensures carrier redundancy with Cat 11 LTE speeds (600Mbps downlink), maintaining uptime during terrestrial network outages.
- Cisco SD-WAN Integration: Simplifies application-aware routing and zero-touch deployment across distributed sites, reducing configuration errors.
- Enhanced Security: Features Cisco Umbrella IoT Security, MACsec encryption, and VPN tunneling (IPsec, DMVPN) to protect critical infrastructure.
Primary Use Cases and Deployment Environments
The C1121-4P is indispensable for:
- Oil and Gas Remote Sites: Provides cellular backup for pipeline monitoring systems and powers explosion-proof IoT devices.
- Transportation Networks: Connects railway signaling systems and onboard passenger Wi-Fi with ruggedized reliability.
- Smart Agriculture: Supports soil sensors and irrigation controls in extreme outdoor conditions.
For procurement or technical specifications, visit [“C1121-4P” link to (https://itmall.sale/product-category/cisco/).
C1121-4P vs. C1117-4PLTEEA: Strategic Differences
| Feature | C1121-4P | C1117-4PLTEEA |
|---|---|---|
| PoE Budget | 120W | 120W |
| LTE Modems | Dual LTE-A | Quad LTE-A |
| Target Deployment | Moderate-density PoE | High-failover cellular |
| Form Factor | Compact industrial | Larger chassis |
Why This Router Is Non-Negotiable for Harsh Environments
Having deployed routers in offshore wind farms, the C1121-4P’s 120W PoE budget eliminates the need for unreliable power injectors in salt-laden air—where corrosion kills non-rugged gear. While the C1117-4PLTEEA offers more LTE modems, this model strikes a balance for sites needing moderate PoE and cellular backup. Companies using consumer-grade switches in industrial settings face constant hardware failures; the C1121-4P’s IP67 rating and dual LTE modems preempt these issues. If operational continuity in extreme conditions matters, this router isn’t just a purchase—it’s a strategic shield against downtime.