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The Cisco QSFP-BX20-100G Compatible LINK-PP module is a high-performance 100G BiDi QSFP28 optical transceiver designed for efficient single-fiber bidirectional networking. It features a 106.25Gb/s PAM4 optical signal rate alongside a 4x25.78Gb/s NRZ CAUI-4 electrical interface. With integrated KP4 FEC and a low power consumption of under 4W, this commercial-grade module ensures exceptional stability for high-density architectures.
| Cisco Part Number | QSFP-BX20-100G | Vendor Name | LINK-PP |
| Form Factor | QSFP28 | Max Data Rate | 106.25Gbps |
| Wavelength | 1311nm-TX/1291nm-RX | Max Cable Distance | 20km |
| Connector | Simplex LC | Media | SMF |
| Transmitter Type | EML | Receiver Type | PIN |
| Modulation (Electrical) | 4x 25G-NRZ | Modulation (Optical) | 1x 100G-PAM4 |
| DDM/DOM | Supported | Operating Temperature Range | 0°C to +70°C |
| Protocols | QSFP28 MSA | Warranty | 5 Years |
This robust 100GBASE-LR1 BiDi single-mode fiber transceiver delivers high-speed connectivity while cutting cabling infrastructure costs in half. Easily identifiable by its red pull tab, it seamlessly integrates advanced EML laser technology and PIN receivers to guarantee superior optical signal integrity across demanding data center interconnects.
Engineered for next-generation networks, this 100G bidirectional optical module is fully compliant with 100G Lambda MSA specifications. It provides an innovative approach to scaling bandwidth capacity efficiently without the need to deploy additional expensive fiber optic cables.
Addressing the high-capacity needs of edge data center networking, this transceiver is an ideal choice for localized 100G DCI solutions and enterprise backhaul. Its robust architecture guarantees seamless and uninterrupted data flow across modern cloud computing environments.
Utilizing advanced WDM technology, this device operates using a precise 1311nm transmitter paired with a sensitive 1291nm receiver. This specific wavelength configuration requires pairing with the complementary purple-latched BLA module to establish a complete synchronized communication link.
Built for extended reach, this long-reach 100G optics solution seamlessly supports up to 20km SMF transmission distances. It easily bridges geographically separated facilities, ensuring reliable and high-fidelity long-haul data transport for metropolitan area network expansions.
Featuring a standard simplex LC connector, this hardware simplifies single-fiber networking deployments. Network administrators can quickly plug in standard LC patch cords, maximizing existing cabling infrastructure efficiency while significantly reducing physical space requirements within high-density server racks.
Integrated Digital Optical Monitoring through a standard I2C interface empowers administrators with real-time optical transceiver DOM capabilities. Network operators can accurately track temperature, voltage, laser bias current, and optical power levels to preemptively identify potential system anomalies.
Industry-leading optical module compliance is guaranteed through strict adherence to global regulatory standards. Every unit is engineered to meet critical safety, environmental, and performance benchmarks worldwide.
A comprehensive factory quality assurance program governs our transceiver reliability testing. We subject every module to intensive automated verification to ensure zero defects before final packaging.
This product holds globally recognized CE, FCC, UKCA, UL, and REACH approvals. Furthermore, it utilizes RoHS compliant optics to ensure environmentally responsible and safe manufacturing practices.
As a fully MSA compliant transceiver adhering to SFF-8636 protocols, it delivers flawless multi-vendor interoperability. This ensures plug-and-play compatibility across a wide range of branded switches and routers.
Advanced optical performance validation processes are executed in our labs, ensuring every QSFP28 module maintains peak operational integrity under high-demand network traffic.
Precise wavelength stability is confirmed to prevent signal overlap and ensure optimal laser functioning.
Detailed mask margin analysis validates PAM4 signal integrity for distortion-free high-speed data transmission.
Long-duration stress testing verifies zero packet loss and confirms the reliability of onboard FEC.
Modules undergo cyclical thermal evaluation to guarantee commercial thermal tolerance from 0°C to 70°C.
We utilize a highly secure optical module distribution network, ensuring your mission-critical networking hardware arrives quickly and safely at any global destination.
Specialized ESD safe transit bags prevent electrical damage during manual handling.
Custom-molded secure foam packaging shields delicate optics from unexpected impact drops.
Streamlined warehouse operations guarantee expedited warehouse fulfillment for urgent hardware upgrades.
We partner with top carriers for reliable worldwide courier shipping solutions.
Deploying this hot-swappable optical module is incredibly straightforward. Simply insert the transceiver into a compatible QSFP28 port, engage the red latch, connect your simplex single-mode fiber, and the system will automatically initialize the link within ten seconds.
LINK-PP provides professional technical support, including pre-sales consultation, compatibility verification, and post-deployment troubleshooting to ensure smooth network operation.
Professional technical guidance to help customers select the most suitable QSFP-BX20-100G modules based on network architecture and application requirements.
Compatibility checks and validation to ensure seamless operation with Cisco switches and other supported networking platforms.
Step-by-step support for installation, configuration, and initial deployment to ensure stable and correct operation.
Ongoing technical support throughout the product lifecycle to ensure reliable performance in enterprise and carrier-grade networks.
LINK-PP provides after-sales support for the smooth deployment and reliable operation of the optical modules.
15-day no-reason return and refund
Free replacement for dead-on-arrival (DOA) or defective items within the initial period
Free repair services for manufacturing defects throughout the warranty period
Warranty exclusions and conditions apply
Compatible | Cisco | Cisco | Cisco | Cisco | Cisco | Cisco |
Data Rate (Max) | 106.25Gbps | 106.25Gbps | 106.25Gbps | 106.25Gbps | 106.25Gbps | 106.25Gbps |
Wavelength | 1311nm-TX/1291nm-RX | 1331nm-TX/1271nm-RX | 1309.14nm-TX/1304.58nm-RX | 1291nm-TX/1311nm-RX | 1271nm-TX/1331nm-RX | 1304.58nm-TX/1309.14nm-RX |
Connector | Simplex LC | Simplex LC | Simplex LC | Simplex LC | Simplex LC | Simplex LC |
Cable Distance (Max) | 20km | 10km | 40km | 20km | 10km | 40km |
Cable Type | SMF | SMF | SMF | SMF | SMF | SMF |
Operating Temperature | 0°C to +70°C | 0°C to +70°C | 0°C to +70°C | 0°C to +70°C | 0°C to +70°C | 0°C to +70°C |
Vendor Name | LINK-PP | LINK-PP | LINK-PP | LINK-PP | LINK-PP | LINK-PP |
Form Factor | QSFP28 | QSFP28 | QSFP28 | QSFP28 | QSFP28 | QSFP28 |
Transmitter Type | EML | EML | EML | EML | EML | EML |
Receiver Type | PIN | PIN | APD | PIN | PIN | APD |
Modulation (Electrical) | 4x 25G-NRZ | 4x 25G NRZ | 4x 25G-NRZ | 4x 25G-NRZ | 4x 25G NRZ | 4x 25G-NRZ |
Modulation (Optical) | 1x 100G-PAM4 | 1x 100G PAM4 | 1x 100G-PAM4 | 1x 100G-PAM4 | 1x 100G PAM4 | 1x 100G-PAM4 |
DDM/DOM | Supported | Supported | Supported | Supported | Supported | Supported |
Protocols | QSFP28 MSA | QSFP28 MSA, SFF-8636, IEEE 802.3bs, CAUI-4 | QSFP28 MSA, IEEE 802.3bs, 100G Lambda MSA | QSFP28 MSA | QSFP28 MSA, SFF-8636,IEEE 802.3bs , CAUI-4 | QSFP28 MSA, IEEE 802.3bs, 100G Lambda MSA |
Warranty | 5 Years | 5 Years | 5 Years | 5 Years | 5 Years | 5 Years |
| Pictures | ID# | Description | Price | Stock | Add to Cart |
Q: Which exact fiber patch cord and paired module do I need to establish a working 100G link? By D***n on 2025-11-22
A: This module uses a Simplex LC connector over standard single-mode fiber (SMF / OS2 9/125μm) up to 20km. Since this unit transmits at 1311nm and receives at 1291nm (Red pull tab), the opposite end of the fiber strand must be equipped with the complementary LQ-BLA100-L21C module (1291nm-TX / 1311nm-RX, Purple pull tab) to establish a synchronized bidirectional link. By admin on 2025-11-22
Q: How does the optical performance and packet error rate of this BiDi optic compare against original brand 100GBASE-BX20 modules? By D***g on 2025-06-19
A: This module delivers identical carrier-grade performance to OEM equivalents. Equipped with an industry-grade 1311nm EML transmitter, high-sensitivity PIN receiver, integrated DSP with KP4 FEC, and power consumption under 4W, it guarantees zero-packet-loss transmission over 20km single-mode fiber at a fraction of the OEM cost. By admin on 2025-06-19
Q: Can this QSFP28 BiDi optic operate in harsh outdoor telecom cabinets, or is an industrial wide-temperature version available? By C***n on 2025-05-02
A: The standard LQ-BLB100-L21C is rated for commercial operating temperatures (0°C to +70°C). If you are deploying in non-climate-controlled outdoor enclosures or 5G cell tower base stations, please contact our engineering team to request the industrial wide-temperature version (-40°C to +85°C). By admin on 2025-05-02
Q: Does this transceiver comply with international telecommunications and environmental standards? By E***l on 2025-04-24
A: Yes, the module complies with IEEE 802.3cd/100GBASE-LR1, QSFP28 MSA, and SFF-8636 management specifications. It is fully certified under CE, FCC, RoHS, and REACH directives, meeting Class 1 Laser Safety standards (IEC 60825-1). By admin on 2025-04-24
Q: Can this LQ-BLB100-L21C module interoperate smoothly between a Cisco Nexus switch on one end and an Arista or Juniper switch on the other? By E***n on 2024-12-30
A: Yes. The module is engineered in full compliance with QSFP28 MSA and 100G Lambda MSA standards. We offer custom EEPROM vendor coding for Cisco, Arista, Juniper, Dell, Mellanox/NVIDIA, and Generic platforms to guarantee 100% host recognition, DDM functionality, and seamless cross-platform optical interoperability. By admin on 2024-12-30
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