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GLC-BX-U40-C
1000Base-BX40 SFP 1310 TX/1490 RX Cisco Compatible
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GLC-BX-U40-C is a SFP transceiver that delivers 1G Ethernet connectivity using dual wavelengths of 1310 nm for transmit and 1550 nm for receive over a single strand of single-mode fiber. It features an LC connector and is engineered for extended transmission distances of up to 40 km, making it ideal for long-haul data transport in data centers, enterprise networks, and telecom infrastructures.
This module adheres to a compact SFP form factor and is designed to support Ethernet protocols reliably in demanding optical networking environments. Its proven performance under standard operating conditions makes the GLC-BX-U40-C a dependable solution for modern fiber-optic applications.
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| GLC-BX-U40-C |  GLC-ZX-SM-C |  SFP-GE-S-C |  GLC-TE-C |  WS-SFP-LX-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 | SC | RJ45 | LC |
| Wavelength | 1310/1550 nm | 1310 nm | 850nm | N/A | 1310 nm |
| Transmission Distance | Extended-Range | Long-Range | Short-Range | Short-Range | Long-Range |
| Fiber Type | Single-mode | Single-mode | Multi-mode | N/A | Single-mode |
| Max Distance | 40 km | 10 km | 550 meters | 100 meters | 10 km |
| Supported Protocols | Ethernet | Ethernet | Ethernet | Ethernet | Ethernet |
| Network Interface | Fiber | Fiber | Fiber | Ethernet | Fiber |
| Power Consumption | N/A | 1.5W | 1.5W | 1.6W | 1.5 W |
| 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 | Cisco / Juniper / Huawei / Arista | Cisco | Cisco / Juniper / Huawei / Arista |
| Product Name | GLC-BX-U40-C | Cisco GLC-ZX-SM-C SFP Transceiver | SFP-GE-S-C | GLC-TE-C | WS-SFP-LX-C |
| Height | N/A | N/A | N/A | N/A | 0.6 inches |
| Width | N/A | N/A | N/A | N/A | 0.8 inches |
| Depth | N/A | N/A | N/A | N/A | 1.6 inches |
| Weight | N/A | N/A | N/A | N/A | 0.1 lbs |
Flawless 40km upstream performance. The 1310nm transmitter provides a clean signal across long fiber spans.
Consistent and reliable. These transceivers are critical for our site-to-site single-fiber links.
Exceptional long-range BiDi. Pairs perfectly with D40 modules for efficient, high-speed 40km connectivity.
Top-tier stability. We've noticed zero signal degradation since installing these in our regional hubs.
Dependable and efficient. A smart choice for maximizing bandwidth on existing long-distance single-mode fiber.
Professional performance. These SFPs offer the high uptime required for our enterprise clients.
Robust and reliable. They handle the task of long-range data transmission with impressive ease.
Solid build quality. A very trustworthy upstream solution for 40km single-fiber networking.
The GLC-BX-U40-C is a Cisco-compatible 1000Base-BX40 Small Form-Factor Pluggable (SFP) transceiver that enables single-fiber bi-directional Gigabit Ethernet links over single-mode fiber.
The GLC-BX-U40-C supports full-duplex data rates up to 1.25 Gbps, compliant with IEEE 802.3z Gigabit Ethernet standards.
It transmits data at 1310 nm (TX) and receives data at 1490 nm (RX) over a single-mode fiber strand.
It supports link distances up to 40 km over standard single-mode fiber (SMF) with a maximum link budget of 23 dB.
The GLC-BX-U40-C is designed exclusively for single-mode fiber (SMF) applications; it is not compatible with multi-mode fiber.
It is compatible with Cisco switches and routers featuring SFP ports that support 1000Base-BX40 transceivers, including Catalyst and ASR series.
Yes. The GLC-BX-U40-C is hot-pluggable, allowing you to install or remove it while your Cisco equipment remains powered on.
It uses a standard LC simplex connector for single-fiber bi-directional transmission.
It supports IEEE 802.3z Gigabit Ethernet (1000Base-BX40) and is interoperable with Gigabit Ethernet switching and routing protocols.
The typical power consumption is ≤1.0 W, ensuring energy-efficient operation in high-density deployments.
It operates reliably between 0 °C and 70 °C (32 °F to 158 °F), suitable for standard data center environments.
The Mean Time Between Failures (MTBF) exceeds 1,000,000 hours, providing high availability for critical links.
Align the module with the SFP slot, gently insert until it clicks, and secure the fiber cable into the LC connector; no special tools are required.
Use standard single-mode fiber (SMF) patch cables with LC simplex connectors; no specialized cable types are necessary.
Yes. It includes a one-year limited warranty covering manufacturing defects and ensures Cisco compatibility.
The GLC-BX-U40-C offers the same performance, interoperability, and Cisco-style compatibility at a lower cost as a third-party alternative.