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GLC-BX35-U40-C
1000Base-BX40 SFP 1310 TX/1550 RX Cisco Compatible
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GLC-BX35-U40-C is an SFP transceiver designed to deliver reliable 1G Ethernet connectivity. It employs LC connectors and a dual-wavelength design—1310 nm for transmit and 1490 nm for receive—enabling long-range transmission over single-mode fiber. The product is engineered to support various Ethernet-based applications in data centers, enterprise networks, and telecom environments.
GLC-BX35-U40-C features a compact SFP form factor with dimensions optimized for high-density network installations. Built for robust performance and seamless integration, this transceiver meets the rigorous demands of long-distance connectivity (up to 40 km) while maintaining industry-standard operating conditions and compatibility with Cisco-based infrastructures.
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 GLC-BX35-U40-C |  WS-SFP-LX-C |  GLC-BX-U40-C |  10720-GE-SFP-LH-C |  GLC-ZX-SMD-C | |
|---|---|---|---|---|---|
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | SFP | SFP | SFP | SFP | SFP |
| Data Rate | 1G | 1G | 1G | 1G | 1G |
| Connector Type | LC | LC | LC | LC | LC |
| Wavelength | 1310/1490 nm | 1310 nm | 1310/1550 nm | 1310nm | 1550nm |
| Transmission Distance | Long-Range | Long-Range | Extended-Range | Long-Range | Long-Range |
| Fiber Type | Single-mode | Single-mode | Single-mode | Single-mode | Single-mode |
| Max Distance | 40 km | 10 km | 40 km | 10 km | 70 km |
| Supported Protocols | Ethernet | Ethernet | Ethernet | Ethernet | Ethernet |
| Network Interface | Fiber | Fiber | Fiber | Fiber | Fiber |
| Power Consumption | N/A | 1.5 W | N/A | N/A | N/A |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Compatibility | Cisco | Cisco / Juniper / Huawei / Arista | Cisco | Cisco | Cisco |
| Product Name | GLC-BX35-U40-C | WS-SFP-LX-C | GLC-BX-U40-C | 10720-GE-SFP-LH-C | GLC-ZX-SMD-C |
| Height | 0.3 inches | 0.6 inches | N/A | N/A | N/A |
| Width | 0.57 inches | 0.8 inches | N/A | N/A | N/A |
| Depth | 1.1 inches | 1.6 inches | N/A | N/A | N/A |
| Weight | 0.1 lbs | 0.1 lbs | N/A | N/A | N/A |
Flawless 40km reach on single fiber. The 1310nm TX signal is incredibly stable, saving us significant fiber cabling costs in our regional link.
Reliable BiDi performance. Immediately recognized by our Cisco chassis. Perfect for maximizing capacity on existing long-range single-mode infrastructure.
Solid build and performance. We've seen zero packet loss over the full 40km span. Highly cost-effective alternative for our network expansion.
Seamless integration. The BiDi technology is a lifesaver for our fiber-constrained environment. Throughput remains consistent under heavy load.
Professional grade SFP. Exceptional value for 40km distances. The 1310/1550 wavelength pairing works perfectly without any interference.
High-quality upstream module. It outperformed our expectations for stability. A very dependable choice for mission-critical long-haul connectivity.
Great reliability. This module provides the steady performance needed for our remote sites. Very satisfied with the plug-and-play simplicity.
The GLC-BX35-U40-C is a Cisco-compatible 1000Base-BX40 SFP transceiver module supporting 1Gbps over single-mode fiber with 1310nm TX and 1550nm RX wavelengths.
It supports a 1.25Gbps data rate, providing Gigabit Ethernet performance for high-speed networks.
It operates on single-mode fiber using a 1310nm transmit wavelength and a 1550nm receive wavelength.
The module supports up to 40 km reach over standard single-mode fiber at specified link budgets.