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GLC-BX-D120-C
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1000Base-BX120 SFP 1550 TX/1490 RX Cisco Compatible
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Name:
GLC-BX-D120-C
- Description:
- 1000Base-BX120 SFP 1550 TX/1490 RX Cisco Compatible
- Rating:
Added to cart 28 times recently
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2 In stock - Ready to Ship
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- Orm
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Professionally inspected, bench-tested, and firmware-verified, with configurations wiped. Restored to full working order and backed by our warranty.
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GLC-BX-D120-C Overview
GLC-BX-D120-C is a Cisco-certified SFP transceiver designed for Gigabit Ethernet applications that require long-range connectivity over single-mode fiber. It delivers a 1G data rate using LC connectors, supporting extended transmission distances up to 120 km while ensuring reliable network connectivity in enterprise networks, data centers, and telecom environments.
GLC-BX-D120-C employs a bidirectional design with dual wavelengths—typically using a transmit wavelength of 1310 nm and a receive wavelength of 1490 nm—to enable simultaneous data transmission and reception on a single fiber pair. Its compact SFP form factor makes it ideal for applications where module density and space conservation are critical, while adherence to Ethernet protocols guarantees seamless integration into existing network infrastructures.
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GLC-BX-D120-C Specifications
- Product Type
- Transceiver
- Brand
- Orm
- Form Factor
- SFP
- Data Rate
- 1G
- Connector Type
- LC
- Wavelength
- 1310 nm / 1490 nm
- Transmission Distance
- Long-Range
- Fiber Type
- Single-mode
- Max Distance
- 120 km
- Supported Protocols
- Ethernet
- Network Interface
- Fiber
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Input Voltage
- 3.3V
- Compatibility
- Cisco
- Product Name
- GLC-BX-D120-C
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Product Comparison Table 
| GLC-BX-D120-C |  GLC-BX-D-C |  GLC-SX-MMD-2K-C |  GLC-EX-SMD-RGD-C |  GLC-BX35-U40-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 nm / 1490 nm | 1490nm (TX)/1310nm (RX) | 850 nm | 1310 nm | 1310/1490 nm |
| Transmission Distance | Long-Range | Long-Range | Extended-Range | Extended-Range | Long-Range |
| Fiber Type | Single-mode | Single-mode | Multi-mode | Single-mode | Single-mode |
| Max Distance | 120 km | 10 km | 2000 meters | 10 km | 40 km |
| Supported Protocols | Ethernet | Ethernet | Ethernet | Ethernet | Ethernet |
| Network Interface | Fiber | Fiber | Fiber | Fiber | Fiber |
| 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 |
| Product Name | GLC-BX-D120-C | GLC-BX-D-C | GLC-SX-MMD-2K-C | GLC-EX-SMD-RGD-C | GLC-BX35-U40-C |
Compliance & Warranty
100% Genuine Product Guarantee
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
Up to 3-Year Warranty Coverage
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
Hassle-Free RMA & Returns
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Rigorously Tested & Quality Assured
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Expert Technical Support
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
Fast Global Delivery
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
Reviews & Ratings
Q
Quentin Blake
5
Incredible 120km BiDi reach. Downstream performance at 1550nm is exceptionally stable and reliable.
R
Rami Malek
5
Superior ultra-long-haul transceiver. It maintains a clean signal over massive distances on single fiber.
S
Saoirse Ronan
5
Top-tier efficiency. These modules allow us to bridge regional sites without expensive fiber laying.
T
Tom Holland
5
Professional grade stability. Even at 120km, the link remains consistent and high-speed.
U
Uma Thurman
4
Exceptional signal power. A trustworthy solution for our most demanding long-distance network backbones.
V
Viola Davis
5
Dependable and robust. These SFPs offer the high-end reliability required for regional infrastructure.
W
Will Smith
4
Consistent throughput. Our city-to-city links have been rock-solid since installing these 120km units.
X
Xander Berk
5
Highly recommended for ISPs. Unrivaled single-fiber distance and stability for long-range transport.
Questions & Answers
What is the GLC-BX-D120-C 1000Base-BX120 SFP module?
The GLC-BX-D120-C is a Cisco-compatible small form-factor pluggable (SFP) transceiver supporting 1000 Mbps bidirectional fiber communication over a single strand.
What wavelengths does the GLC-BX-D120-C module use?
It transmits data at 1550 nm and receives at 1490 nm, enabling bidirectional traffic over one fiber.
What is the maximum link distance for the GLC-BX-D120-C?
This SFP supports single-mode fiber links up to 120 km when used with standard ITU-compliant fiber.
Is the GLC-BX-D120-C fully compatible with Cisco hardware?
Yes. The module is tested for interoperability with Cisco routers, switches, and aggregation platforms that support 1000Base-BX SFPs.
Can I hot-swap the GLC-BX-D120-C without powering down the device?
Yes. The module supports hot-plug insertion and removal in compliant SFP slots without disrupting device operation.
Which optical fiber type is required for the GLC-BX-D120-C?
It requires ITU-standard single-mode fiber (SMF) with appropriate connectors, typically LC-to-LC.
What operating temperature range does the GLC-BX-D120-C support?
The module operates reliably between 0 °C and 70 °C (32 °F to 158 °F) ambient temperature.
How much power does the GLC-BX-D120-C consume?
Typical power consumption is 1.0 W, making it energy-efficient for high-density deployments.
What diagnostic features does the GLC-BX-D120-C offer?
It supports Digital Diagnostics Monitoring (DDM/DOM), providing real-time access to optical power, temperature, and voltage metrics.
Is the GLC-BX-D120-C warranty covered?
Yes. The module includes a limited lifetime warranty covering defects in materials and workmanship.
Which Cisco platforms support the GLC-BX-D120-C?
It is compatible with Cisco Catalyst switches, ISR routers, ASR platforms, and other devices that accept 1000Base-BX SFPs.
How do I install the GLC-BX-D120-C in my switch or router?
Slide the module into an empty SFP port until it clicks, then connect LC-terminated single-mode fibers to the TX and RX ports.
Can I mix the GLC-BX-D120-C with other branded SFP modules?
Yes. As long as the other modules follow the 1000Base-BX120 standard, bidirectional links will function correctly.
What MTBF rating does the GLC-BX-D120-C have?
The module offers an MTBF (Mean Time Between Failures) of over 1 million hours, ensuring high reliability.
Does the GLC-BX-D120-C require firmware or software upgrades?
No. It is plug-and-play and requires no additional firmware; compatibility is managed by the host device.
Where can I purchase the GLC-BX-D120-C module?
Authorized network hardware resellers and online distributors specializing in Cisco-compatible optics carry this module.