SFP-10G-BX40D-I Cisco 10GBASE-BX40-D Bidirectional for 40km

Cisco SFP-10G-BX40D-I - 10GBASE-BX BiDi SFP+ Transceiver, 40 km, Downstream

The Cisco SFP-10G-BX40D-I is a 10 Gigabit Ethernet bidirectional (BiDi) SFP+ transceiver designed for long-reach single-fiber applications. It uses a single strand of single-mode fiber (SMF) to transmit and receive data, reducing fiber infrastructure costs while supporting transmission distances up to 40 km.

🔧 Key Specifications

• Model: SFP-10G-BX40D-I
• Form Factor: SFP+ (hot-swappable)
• Data Rate: 10 Gbps
• Reach: Up to 40 km over single-mode fiber (SMF)
• Connector: LC simplex (single-fiber bidirectional)
• Wavelengths:
  • Transmit (Tx): 1330 nm
  • Receive (Rx): 1270 nm
• Cable Type: Single-mode fiber (SMF)
• Features:
  • Bidirectional transmission over a single fiber strand
  • Digital Optical Monitoring (DOM) for real-time diagnostics
  • Hot-swappable for minimal downtime
  • Compatible with Cisco 10G-capable switches and routers

🧩 Ideal Use Cases

• Metro and enterprise networks requiring long-reach 10G connectivity
• Fiber-constrained environments where single-fiber BiDi optics reduce costs
• Service providers deploying 10G links over existing single-fiber infrastructure
• Data centers needing efficient long-haul interconnects

⚙️ Licensing & Expansion
No additional licensing required. Must be paired with the Cisco SFP-10G-BX40U-I (upstream module, Tx 1270 nm / Rx 1330 nm) for proper bidirectional operation.