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Cisco

Cisco SFP-50G-BX40U-I | 50G BiDi Transceiver, 1289nm TX/1314nm RX, 40km SMF

SFP-50G-BX40U-I

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Description

The Cisco SFP-50G-BX40U-I is a 50GBASE-BR40 bidirectional SFP56 transceiver designed for single-fiber deployments up to 40 kilometers over single-mode fiber. This upstream industrial temperature module transmits at 1289nm and receives at 1314nm, enabling cost-effective long-reach connectivity using a single fiber strand. Ideal for data center interconnects, metro networks, and harsh industrial environments requiring extended temperature operation.

Features

Bidirectional transmission over single fiber strand reduces fiber infrastructure costs
- 40km reach on standard G.652 single-mode fiber for metro and campus interconnects
- Dual-rate operation supports both 50Gbps and 25Gbps data rates
- Industrial temperature rating for deployment in harsh environments and outdoor applications
- Hot-swappable SFP56 form factor for flexible installation and maintenance
- Digital Optical Monitoring (DOM) for real-time performance tracking and diagnostics
- Standards-compliant design ensures interoperability with IEEE 802.3 Ethernet specifications
- CPRI V7.0 support for wireless fronthaul and mobile network applications
- Low power consumption for energy-efficient high-density deployments
- Upstream wavelength pairing (1289nm TX / 1314nm RX) for single-fiber bidirectional links
- KP1-FEC and KR1-FEC support for enhanced signal integrity at extended distances

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

Form Factor: SFP56 (Small Form-Factor Pluggable 56)
- Data Rate: 50Gbps (50GBASE-BR40) / 25Gbps (25GBASE-BR40) dual-rate
- Wavelength: TX 1289nm / RX 1314nm (upstream bidirectional)
- Fiber Type: Single-Mode Fiber (SMF) G.652
- Reach: Up to 40 kilometers on single fiber strand
- Connector: Single LC simplex
- FEC Requirement: KP1-FEC for 50G mode, KR1-FEC for 25G mode
- Operating Temperature: Industrial temperature range (-40°C to 85°C)
- Standards Compliance: IEEE 802.3cc, IEEE 802.3cn, IEEE 802.3cd, IEEE 802.3by, CPRI V7.0
- Power Consumption: Low-power SFP56 design
- Digital Diagnostics: DOM/DDM support for real-time monitoring
- Deployment: Must be paired with SFP-50G-BX40D-I downstream module

FAQs

Q: What makes this transceiver bidirectional?
A: The SFP-50G-BX40U-I uses BiDi (bidirectional) technology to transmit and receive over a single fiber strand by separating wavelengths. It transmits at 1289nm and receives at 1314nm, and must be paired with the complementary SFP-50G-BX40D-I module on the opposite end that operates at the reverse wavelengths.

Q: What is the industrial temperature rating?
A: This module is rated for industrial temperature operation, typically -40°C to 85°C, making it suitable for outdoor installations, industrial facilities, and harsh environments where standard commercial temperature transceivers may not be reliable.

Q: Does this transceiver support both 50G and 25G speeds?
A: Yes, the SFP-50G-BX40U-I is a dual-rate module supporting both 50GBASE-BR40 and 25GBASE-BR40. For 50G operation it requires KP1-FEC on the host port, and for 25G mode it requires KR1-FEC on the host ports.

Q: What equipment is this transceiver compatible with?
A: This SFP56 module is compatible with Cisco switches, routers, and network devices featuring SFP56 ports that support 50G or 25G operation. Always verify compatibility with your specific Cisco platform and software version before deployment.

Q: Can I use this transceiver alone for a fiber link?
A: No, BiDi transceivers must be deployed in complementary pairs. The SFP-50G-BX40U-I (upstream) must be paired with an SFP-50G-BX40D-I (downstream) module on the opposite end to establish a working 40km bidirectional link over a single fiber strand.

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