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Uriah Heep
5
Impressive 40km reach on a single fiber. Downstream performance is perfectly stable and consistent.
GLC-BX-D40-C
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1000Base-BX40 SFP 1490 TX/1310 RX Cisco Compatible
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GLC-BX-D40-C
- Description:
- 1000Base-BX40 SFP 1490 TX/1310 RX Cisco Compatible
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- Orm
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GLC-BX-D40-C Overview
GLC-BX-D40-C is a SFP transceiver module engineered for Gigabit Ethernet connectivity. It supports a 1G data rate, features an LC connector, and is designed for long-range operation over single-mode fiber with a maximum reach of up to 40 km at dual wavelengths (1310 nm for transmit and 1490 nm for receive), making it suitable for Ethernet networks in data centers, enterprise environments, and telecom applications.
GLC-BX-D40-C conforms to the standard SFP form factor and delivers reliable performance under typical operating conditions (0 to 70°C) while retaining operational integrity in storage conditions from -40 to 85°C. Its compact design and Cisco compatibility enable seamless integration into fiber networks where long-distance connectivity and cost-effective deployment are paramount.
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GLC-BX-D40-C Specifications
- Power Consumption
- N/A
- Weight
- N/A
- Height
- N/A
- Depth
- N/A
- Width
- N/A
- Product Type
- Transceiver
- Connector Type
- LC
- Supported Protocols
- Ethernet
- Network Interface
- Fiber
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Input Voltage
- 3.3V
- Transmission Distance
- Long-Range
- Fiber Type
- Single-mode
- Max Distance
- 40 km
- Form Factor
- SFP
- Data Rate
- 1G
- Compatibility
- Cisco
- Wavelength
- 1310/1490 nm
- Product Name
- GLC-BX-D40-C
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| GLC-BX-D40-C |  GLC-BX40-DA-I-C |  GLC-BX-D-C |  GLC-BX-U40-C |  SFP-GE-L-C | |
|---|---|---|---|---|---|
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | SFP | QSFP+ | SFP | SFP | SFP |
| Data Rate | 1G | 40G | 1G | 1G | 1G |
| Connector Type | LC | LC | LC | LC | LC |
| Wavelength | 1310/1490 nm | 1310/1490 nm | 1490nm (TX)/1310nm (RX) | 1310/1550 nm | 1310nm |
| Transmission Distance | Long-Range | Long-Range | Long-Range | Extended-Range | Long-Range |
| Fiber Type | Single-mode | Single-mode | Single-mode | Single-mode | Single-mode |
| Max Distance | 40 km | 10 km | 10 km | 40 km | 10 km |
| Supported Protocols | Ethernet | Ethernet | Ethernet | Ethernet | Ethernet |
| Network Interface | Fiber | Fiber | Fiber | Fiber | Fiber |
| Power Consumption | N/A | 5.0W | 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 | Cisco | Cisco | Cisco, Juniper, Huawei, Arista |
| Product Name | GLC-BX-D40-C | GLC-BX40-DA-I-C | GLC-BX-D-C | GLC-BX-U40-C | SFP-GE-L-C |
| Height | N/A | N/A | N/A | N/A | N/A |
| Width | N/A | N/A | N/A | N/A | N/A |
| Depth | N/A | N/A | N/A | N/A | N/A |
| Weight | N/A | N/A | N/A | N/A | N/A |
Reviews & Ratings
V
Vada Sultenfuss
5
Reliable long-distance BiDi. It maintains excellent signal integrity over the full 40km range.
W
Walter White
4
Exceptional throughput. These modules have significantly optimized our regional single-fiber backbone.
X
Xena Warrior
5
Dependable and robust. Ideal for long-range deployments where laying extra fiber isn't an option.
Y
Yusuf Amir
5
Professional grade SFP. Recognized instantly by our Cisco edge routers with zero configuration issues.
Z
Zoe Washburne
5
Great signal stability. The 1490nm TX is strong and provides reliable downstream data transport.
A
Aiden Pearce
5
Superior reliability. These 40km transceivers are built for the long haul in every sense.
B
Bree Van De
5
High-quality BiDi hardware. A cost-effective and reliable solution for our long-range networking.
Questions & Answers
What is the GLC-BX-D40-C 1000Base-BX40 SFP module?
The GLC-BX-D40-C is a Cisco-compatible 1000Base-BX40 SFP transceiver featuring 1490 nm TX and 1310 nm RX for single-mode fiber applications up to 40 km.
What wavelengths does the GLC-BX-D40-C use for transmission and reception?
The module transmits at 1490 nm and receives at 1310 nm, enabling bi-directional communication over a single strand of single-mode fiber.
How far can the GLC-BX-D40-C transmit data?
The GLC-BX-D40-C supports distances up to 40 km over single-mode fiber at 1 Gbps.
Is the GLC-BX-D40-C compatible with Cisco switches and routers?
Yes, the GLC-BX-D40-C is fully compatible with Cisco Catalyst, Nexus, ISR, ASR, and UCS platforms without requiring IOS modifications.
What type of fiber cable is required for the GLC-BX-D40-C?
Use ITU-G.652 single-mode fiber with LC/UPC connectors for optimal performance and compliance.
Can I hot-swap the GLC-BX-D40-C in my network device?
Yes, the 1000Base-BX40 SFP supports hot-insertion and removal without powering down the network device.
What data rate does the GLC-BX-D40-C support?
The transceiver supports a data rate of 1.25 Gbps (Gigabit Ethernet) for full-duplex operation.
Does the GLC-BX-D40-C support digital optical monitoring (DOM)?
Yes, the module features SFF-8472 compliant DOM, providing real-time monitoring of TX/RX power, temperature, voltage, and laser bias current.
What is the operating temperature range of the GLC-BX-D40-C?
The GLC-BX-D40-C operates reliably from 0 °C to 70 °C (32 °F to 158 °F) in standard commercial environments.
How much power does the GLC-BX-D40-C consume?
Typical power consumption is 1.1 W, ensuring efficient operation in high-density installations.
Can I mix the GLC-BX-D40-C with other third-party SFP modules?
Yes, this Cisco-compatible module interoperates with most industry-standard SFP ports that support 1000Base-BX40.
How do I install the GLC-BX-D40-C on my switch or router?
Insert the module into a compatible SFP slot until it clicks, connect LC fiber, and verify link status LED for operational confirmation.
What warranty coverage is provided for the GLC-BX-D40-C?
The transceiver carries a one-year limited warranty covering defects in materials and workmanship under normal use.
How do I troubleshoot link issues with the GLC-BX-D40-C?
Verify correct TX/RX orientation, fiber cleanliness, and DOM readings. Check device logs and ensure firmware supports 1000Base-BX40.
What distinguishes the GLC-BX-D40-C from the GLC-BX-D40-U model?
The GLC-BX-D40-C uses 1490 nm TX/1310 nm RX, while the GLC-BX-D40-U reverses wavelengths, making them a complementary pair for bidirectional links.
Is special licensing required to use the GLC-BX-D40-C on Cisco devices?
No additional licenses or IOS image modifications are needed; the module is recognized natively by Cisco platforms.