Are you encountering bottlenecks with your network due to exploding data demand and the inability to add more fiber? What if you could essentially double your fiber capacity without physically laying more fiber or messing with the ones you already have? The 25G BiDi SFP28 module accomplishes this, delivering high-capacity 25G Ethernet over a single fiber, running bidirectionally. In this post, we examine the benefits and technical specifications of 25G BiDi SFP28 technology to reduce fiber usage, reduce deployment costs, and even reduce the hassle of upgrading. Discover the benefits, technical specifications, and deployment ideas that will help you build your network for efficiency and affordability.
Why Choose 25G BiDi SFP28? What It Brings to Your Network
The 25G BiDi SFP28 module is a game-changer for deploying a 25G Ethernet network by delivering high-speed Ethernet through one fiber using bidirectional transmission of data. Traditional duplex modules deploy signals on two fibers—one fiber for transmit (Tx) and one for receiving (Rx)—but the BiDi module leverages Wavelength Division Multiplexing (WDM) technology to transmit and receive on different wavelengths concurrently through a single fiber. WDM was designed to carry signals in both directions over a single physical medium, which simplifies the optical network while compounding fiber utilization.
By eliminating fiber waste, the BiDi SFP28 module value proposition is founded on two different features: drastically reducing fiber usage and reduced capital expenditures on items like fiber leasing costs and installation labor by half compared to traditional Ethernet deployments. For networks where fiber availability is severely limited, such as urban areas and college campuses, the 25G BiDi SFP28 is an IT/Network leader’s best friend to implement when upgrading networks. In the past, this would take significant effort and time to deploy additional fiber, but this now is rapid and simple with only a lightweight module and patch cable in the transceiver space.
If you think of the BiDi as a single double-wide road that requires no fiber infrastructure. Two lanes flow in both directions on one road! Two lanes in one space, same highway speed and quality with less impact on available space. Read more about the BiDi ecosystem journey at the BiDi Optical Modules Guide. In conclusion, the 25G BiDi SFP28 is a powerful proposition for networks needing to quickly evolve to higher levels of bandwidth, while taking up less fiber and without the agonizing life cycle of laying additional fiber infrastructure.
Deep Dive into 25G BiDi SFP28 Features
For effective deployment, knowing the technical differences between a 25G BiDi SFP28 and a traditional 25G duplex SFP28 is critical. Your selection affects fiber consumption and utilization, installation complexity, OPEX/CAPEX, and applicable use cases.
25G BiDi SFP28 vs Traditional 25G Duplex SFP28
| Feature | 25G BiDi SFP28 | Traditional 25G Duplex SFP28 |
| Fiber Requirements | Single fiber for Tx and Rx | Two fibers (separate Tx and Rx) |
| Module Count | One module per device | One module per device |
| Installation Complexity | Simpler cabling, fewer fibers | More fiber management needed |
| Cost | Lower fiber infrastructure costs | Higher fiber and installation costs |
| Typical Use Cases | Fiber-constrained environments, metro, campus | Data centers, short-distance links |
| Tx/Rx Wavelength Pairs | Distinct paired wavelengths (e.g., 1270/1330 nm) | No WDM, uses separate fibers |
| Transmission Distance | Up to 10-20 km (varies by model) | Up to 10 km (varies by model) |
| Power Budget | Typically 0 to 5 dB depending on model | Similar range |
| Data Rate | 25 Gbps full duplex | 25 Gbps full duplex |
Clarifying Key Parameters
- Tx/Rx Wavelength Pair: 25G BiDi modules employ bidirectional wavelength division multiplexing, allocating distinct wavelengths for transmission (Tx) and reception (Rx) functions over one fiber. Through this Tx/Rx wavelength pairing, the signals are protected from interfering with each other, while allowing for full-duplex communication.
- Distance Transmission: The distance is the same for either module type, with both supporting up to 10-20 km, depending on the fiber quality and the exact specific model. The high efficiency enables BiDi modules to reduce fiber requirements by half when deploying them over long distances.
- Power Budget: A power budget is necessary to ensure the integrity of the signal over the distance you will be using it, including the required output from the transmitter and the receiver’s required sensitivity.
- Data Rate: Both optical modules (bi-directional and duplex) support a data rate of 25 Gbps full duplex; a high throughput performance with low latency.
Importance of a Proper Tx and Rx Pairing
A proper pairing of the Tx and Rx wavelengths is critical for 25G BiDi SFP28. Improperly paired wavelengths will almost certainly lead to a failed link or loss of data. The reason for this is that the signals will either collide with each other or one will be filtered. The installation manual and the SFP module’s datasheet will outline the proper wavelength pair required for your installation, so if you need to redeploy the 25G BiDi SFP, it is going to be very costly.
To help visualize the importance of a proper Tx/Rx wavelength pairing, think of a pair in a dance performance matched with perfect rhythm and stride on the same stage (fiber). When the dance pair is properly matched, the performance is executed flawlessly and seamlessly. If they are out of sync, it will result in disaster.
Choosing between a 25G BiDi and a traditional duplex optical transceiver module depends primarily on the availability of fiber runs, desired cost savings, and simplicity of the network design. The single fiber infrastructure that a BiDi can offer to reduce physical infrastructure will work well if an operator has or will install fiber resources that are not completely tapped. If the current design has many long fiber runs that are minimal, there are plentiful fiber runs. Duplex transceiver modules will be an excellent option.
In conclusion, we have highlighted the various technical aspects of the above-mentioned content to make sure you understand the basics of selecting the proper 25G SFP28 transceiver and assigning it properly based on network cost, performance, and overall simplicity.
25G BiDi SFP28 Product Lineup: Find the Ideal Solution for Your Needs
The 25G BiDi SFP28 families deliver an extensive variety of options developed to accommodate many network environments while ensuring broad compatibility, quality, and stable, high performance. These modules are fully compatible with major industry brands, such as OEM switches and all types of top-tier network devices, and facilitate easily upgrading to the 25G Ethernet standard as a single fiber upgrade.
EMI detecting is a standardized event when discussing 25G BiDi SFP28 modules:
- Broad Compatibility: Support major brands and standards for truly reliable operations.
- High-Speed Transmission: Maintain consistent 25G throughput with low-latency packets.
- Fiber Efficiency: Single-fiber bidirectional transmission reduces the number of fibers and reduces the total overall infrastructure cost.
Ruggedized Design: Fully designed and performed at the highest level with quality components backed by a commitment to long-term stability.
BYXGD-25G-BIDI-SFP28-Tx1270Rx1330nm-2KM-LC: This 25G BiDi SFP28 module transmits data at a rate of 25 Gbps with the transmitting wavelength at 1270 nm and the receiving wavelength at 1330 nm, supports up to 2 km over single-mode fiber, and utilizes an LC interface for quickly transmitting a signal in two directions.
BYXGD-25G-BIDI-SFP28-Tx1350Rx1290nm-10KM-LC: The 25G BiDi SFP28 transceiver module has a data rate of 25 Gbps with a transmitter at 1350 nm and a receiver at 1290 nm, which is designed to transmit up to 10 km over single-mode fiber with an LC connector.
Sample Product List
| Model Number | Tx Wavelength (nm) | Rx Wavelength (nm) | Reach | Application |
| B25G-SFP28-1270 | 1270 | 1330 | Up to 2 km | Data Centers |
| B25G-SFP28-1330 | 1330 | 1270 | Up to 2 km | Enterprise Links |
| B25G-SFP28-1290 | 1290 | 1350 | Up to 10 km | Metro Networks |
| B25G-SFP28-1350 | 1350 | 1290 | Up to 10 km | Campus Networks |
Troubleshooting 25G BiDi SFP28: Common Issues and How to Fix Them
While 25G BiDi SFP28 modules provide good savings on fiber, they can also present some unique troubleshooting issues. Unfortunately, many of these issues involve common-sense types of problems: Tx/Rx wavelength mismatch, faults in a single-fiber cable, and module recognition failure.
Common BiDi-Specific Problems
- Tx and Rx Wavelength Mismatched: Most Tx/Rx wavelength mismatch problems boil down to pairing on either end of the link. No link or sporadic link performance will occur. Tx and Rx wavelengths on both ends must match precisely, even if the wavelength number is the same. Always double-check both ends.
- Faults in Single Fiber Cables: Since it is BiDi, both Tx and Rx share one fiber; any physical damage or contamination to the connector ends of the single fiber can cause a loss of signal altogether. Always physically inspect the connectors and clean fiber endfaces regularly. Monitor the long span of the cable continuity when needed.
- Module Recognition Failures: For the most part, modules not recognizing one another generally boil down to vendor compatibility or firmware compatibility of the SFP28 module and switch. Use the commands from the device CLI to try and identify the module and locate the specific problem as well.
Routine Maintenance Tips
- Regularly cleaning different modules periodically can help prevent any dust or contaminants from building up and perhaps attenuating the signal that is transferring over the module.
- Periodically check firmware updates that address and improve switch and module compatibility problems, or upgrade firmware overall for use in any 25G BiDi payload capacity.
- Try not to hot-swap modules often. While hot swapping is supported in SFP28 modules, it might wear down or stretch some of the mechanical aspects of the module, making it act sluggish.
Think of the BiDi system as being like a two-lane one-way bridge; both lanes need to be clear and communicating to avoid a crash or bottleneck. If you stay on top of monitoring and balancing your BiDi-covered link, it will help maintain continuous and successful data transfer over the one fiber.
Using these simple troubleshooting steps and practical tips for maintenance will help maintain the 25G BiDi SFP28 performance and network stability over a long period of time.
Successful 25G BiDi SFP28 Deployment in a Fiber-Limited Environment
A leading telecommunications provider was experiencing significant fiber cuts within its urban network. The challenge was to increase bandwidth within the limitations of existing fiber cabling without the costs and disruptions of installing new fiber cables. The solution lay in the use of 25G BiDi SFP28 modules.
The bandwidth increase came from the capabilities of single-fiber bidirectional transmission and a reduction in fiber usage of almost 50%, allowing a single fiber strand to operate as a full-duplex 25G link. The fiber leasing costs dropped, alongside fiber infrastructure changes to the physical network.
The company stole a march with the deployment of the 25G BiDi SFP28 modules as this was seamless and quick to deploy. The modules could be integrated readily with existing hardware with little change required to network configuration and network operation. Most importantly, the 25G BiDi SFP28 modules improved network performance with low latency, redundancy, and sustained reliability, ensuring they supported increasing data traffic across the network.
Notable benefits were the following:
- 50% fiber reduction, enabling future growth or capacity expansion
- 40% savings in fiber lease and installation costs
- Improved flexibility in the network, permitting time-saving provisioning of new services
The previous case study indicates that 25G BiDi SFP28 modules provide practical and economic solutions toward bandwidth increases in fiber-short scenarios, meeting the demand and allowing the telecom network to scale, without large capital investments. It was the equivalent of allowing you to access hidden lanes on the roadway without increasing the number of highways!
Frequently Asked Questions
Absolutely, the 25G BiDi SFP28 modules will work with standard single-mode fiber as long as the quality and fiber connectors are engineered to the performance standards you want to achieve for optimal transmission.
The BiDi modules run on a single fiber with separate Tx/Rx wavelengths for bi-directional communication, while duplex modules require two fibers, one for transmit and one for receive communication.
The distances will vary from model to model, but typically, the range of transceivers used for BiDi solutions will fall within the normal distances that most models fall under, which is typically between 2 km and 10 km, the same distance ranges for traditional duplex modules.
Make sure to check the vendor compatibility list and firmware versions for the vendor. You can also use CLI commands like “show interfaces transceiver” to confirm if the switch or device sees the SFP28 module as expected.
Contact Us For The Best Solution
25G BiDi SFP28 modules are an intelligent way to save fiber in your network, reduce deployment costs, and simplify your network infrastructure. Through single-fiber bidirectional transmission, you can enjoy high-speed performance with less physical cabling and equipment in your network.
Check out our wide range of 25G BiDi SFP28 products or speak with one of our technical experts to discuss customized options to fit your network needs. You can confidently deploy an upgraded, high-performance network with 25G BiDi SFP28 modules.