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1000BASE-BX40-D SFP ensures stable 40 km single-fiber bidirectional connections.
GLC-BX40-D-I
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1000BASE-BX40-D for 40km Single-Fiber Bidirectional Applicat...
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GLC-BX40-D-I
- Description:
- 1000BASE-BX40-D for 40km Single-Fiber Bidirectional Applications; with DOM
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- Brand:
- Cisco
- GTIN:
- 8809020389568
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- Warranty:
- 3
- List Price:
$3,111.32
- Price:
$1,275.6559% off
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GLC-BX40-D-I Overview
GLC-BX40-D-I is an SFP transceiver engineered for long-range data transmission over single-mode fiber. It supports a 1G data rate with an LC duplex connector, delivering robust Ethernet connectivity over distances up to 40 km.
GLC-BX40-D-I features a compact SFP form factor with precise physical dimensions tailored for high-density network environments. Ideal for data centers, enterprise networks, and telecom applications, this module meets stringent performance standards while enabling efficient, reliable connectivity.
GLC-BX40-D-I price is $1,275.65, a 59% saving from the Cisco list price of $3,111.32. GLC-BX40-D-I is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for GLC-BX40-D-I for additional pricing. Browse the full Sfp series or explore all Cisco products.
GLC-BX40-D-I 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
- 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
- Network Interface
- Ethernet
- Data Rate
- 1G
- Compatibility
- Cisco
- Wavelength
- 1310/1490 nm
- Product Name
- GLC-BX40-D-I
GLC-BX40-D-I Use Case
Metro Ethernet Aggregation over 40 km Single-Fiber with GLC-BX40-D-I-1000BASE-BX40-D
A service provider extends Metro Ethernet between central office and edge aggregation sites up to 40 km using a single-fiber bidirectional link. The GLC-BX40-D-I-1000BASE-BX40-D module slashes fiber counts by 50 %, supports DOM for real-time optical health monitoring, and ensures SLA-grade 1 Gbps throughput—delivering robust bandwidth growth while minimizing capex and operational overhead.
Enterprise Campus Backbone & DR Link via Single-Fiber Bidirectional Module
An enterprise IT team interconnects headquarters and a remote data center campus over a 40 km span on a single fiber to establish primary and disaster-recovery paths. By deploying GLC-BX40-D-I-1000BASE-BX40-D transceivers, they reduce fiber infrastructure costs, enable DOM-driven fault detection for proactive maintenance, and achieve seamless 1 Gbps connectivity that meets strict RPO/RTO requirements.
Industrial SCADA & Remote Site Control with 1000BASE-BX40-D Single-Fiber
An oil & gas operator links a remote pump station 35 km from the control center over a single-fiber bidirectional circuit. The GLC-BX40-D-I-1000BASE-BX40-D module delivers resilient 1 Gbps transmission in harsh environments, while DOM provides continuous optical diagnostics. This solution reduces field fiber deployment, accelerates troubleshooting, and guarantees high-availability SCADA control for critical infrastructure.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| GLC-BX40-D-I |  SFP-OC3-IR1 |  SFP-OC12-SR= |  GLC-2BX-D |  GLC-LX-NID-0= | |
|---|---|---|---|---|---|
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | SFP | SFP | SFP | SFP | SFP |
| Data Rate | 1G | OC-3 (155 Mbps) | OC-12 | 1G | 1G |
| Connector Type | LC | LC | LC | LC | LC |
| Wavelength | 1310/1490 nm | 1310 nm | 1310 nm | 1310/1550 nm | 1310 nm |
| Transmission Distance | Long-Range | Intermediate-Range | Short-Range | Long-Range | Long-Range |
| Fiber Type | Single-mode | Single-mode | Single-mode | Single-mode | Single-mode |
| Max Distance | 40 km | 80 km | 10 km | 20 km | 10 km |
| Supported Protocols | Ethernet | SONET/OC-3 | SONET, OC-12 | Ethernet | Ethernet |
| Network Interface | Ethernet | Fiber | Fiber | Fiber | Ethernet |
| Power Consumption | N/A | 1.5 W | 1.5W | 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, Juniper, Huawei, Arista | Cisco | Cisco |
| Product Name | GLC-BX40-D-I | SFP-OC3-IR1 | SFP-OC12-SR= | GLC-2BX-D | Cisco GLC-LX-NID-0= |
| Height | N/A | 0.30 inches | 0.30 inches | 0.59 in | N/A |
| Width | N/A | 0.65 inches | 0.55 inches | 0.33 in | N/A |
| Depth | N/A | 1.5 inches | 0.75 inches | 2.11 in | N/A |
| Weight | N/A | 0.2 lbs | 0.08 lbs | 0.028 lbs | N/A |
Reviews & Ratings
J
Jude Nash
4
Durable transceiver with DOM support for enterprise reliability.
K
Kieran Ross
5
Professional-grade module with consistent performance.
L
Lydia Ford
4
Easy installation and minimal maintenance required.
M
Marcus Blake
5
Stable and reliable for long-distance fiber links.
Questions & Answers
What is the GLC-BX40-D-I 1000BASE-BX40-D SFP module?
The GLC-BX40-D-I is a 1 Gbps SFP transceiver for single-fiber bidirectional transmission up to 40 km, featuring Digital Optical Monitoring (DOM).
Which wavelength does the GLC-BX40-D-I operate on?
It transmits at 1310 nm and receives at 1490 nm for downstream and upstream data on a single fiber.
What type of fiber does this SFP module support?
It supports single-mode fiber (SMF) compliant with ITU-T G.652 and G.655 standards.
What is the maximum reach of the GLC-BX40-D-I module?
It provides reliable links up to 40 km over single-mode fiber.
Is Digital Optical Monitoring (DOM) supported?
Yes, DOM monitors real-time parameters like optical power, temperature, and voltage via the I²C interface.
Which networking devices are compatible with this SFP?
It is compatible with a wide range of switches, routers, and media converters supporting 1000BASE-BX40-D.
How do I install the GLC-BX40-D-I in my switch?
Insert the SFP into a compatible 1 Gbps port until it clicks, then configure the port for 1000BASE-BX40-D mode.
Does this module require external cooling?
No, it uses a compact metal housing with built-in heat dissipation suitable for standard operating temperatures (–40 °C to 85 °C).
What power budget does the GLC-BX40-D-I offer?
It provides a transmitter power of 0 to +5 dBm and a receiver sensitivity of –24 dBm, yielding a power budget of at least 19 dB.
Can I use this module in a CWDM or DWDM network?
No, it is designed specifically for single-fiber bidirectional applications, not for CWDM or DWDM wavelength grids.
Is the GLC-BX40-D-I hot-pluggable?
Yes, it supports hot-plug functionality for seamless installation and removal without powering down the host device.
What safety standards does this SFP comply with?
It meets FDA 21 CFR 1040.10, IEC 60825-1 and EN 60825-1 laser safety standards.
How do I troubleshoot a link failure with this module?
Verify fiber polarity, check DOM optical thresholds, ensure proper port configuration and clean the fiber connectors.
Does the GLC-BX40-D-I come with warranty support?
Yes, it includes a one-year limited warranty covering defects in materials and workmanship.
Can I mix this SFP with other vendors’ transceivers?
Interoperability is generally supported, but compatibility with specific vendor firmware should be validated.
What are the key applications for the GLC-BX40-D-I?
Ideal for metro, access, and enterprise networks requiring cost-effective 40 km single-fiber bidirectional links.