• Pink and silver qsfp-100g-s20d4 bcc transceiver module with metallic connector housing for 100gb bidi single-mode 20km use
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Blue Cable Co

QSFP-100G-B20D4-I-BCC | Cisco Compatible 100GB BiDi Single-Mode 20km (LC Simplex, Downstream)

QSFP-100G-B20D4-I-BCC

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$2,964.50 inc. GST
$2,695.00 ex. GST
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Description

The QSFP-100G-B20D4-I-BCC is a drop-in compatible replacement for the Cisco QSFP-100G-B20D4-I. This transceiver provides plug-and-play 100 Gigabit Ethernet connectivity over a single strand of G.652 single-mode fibre at distances up to 20km on Cisco QSFP28 platforms. - QSFP28 MSA compliance per IEEE 802.3cu (CAUI-4) and SFF-8679 specifications guarantees electrical and physical interoperability with Cisco QSFP 100G ports - 100Gbps over single LC simplex fibre using O-band wavelengths: Tx 1274/1278/1282/1287 nm, Rx 1296/1300/1304/1309 nm - Downstream BiDi unit operating as matched pair with QSFP-100G-B20U4-I upstream transceiver, enabling full-duplex transmission on one fibre strand via diplexer wavelength separation - Four 25Gbps lanes per direction using NRZ modulation over LAN WDM grid spacing, requires host-based RS-FEC for 20km reach - Industrial temperature rating of -40°C cold start and -20°C to +85°C mission mode operation for deployment in environmentally challenging locations - Digital Optical Monitoring (DOM) provides real-time access to transmit power, receive power, temperature, bias current, and supply voltage parameters

Features

• QSFP28 MSA and IEEE 802.3cu compliance ensures the CAUI-4 electrical interface meets specification for seamless operation in Cisco QSFP 100G ports across switches and routers
• Four-lane architecture with each lane transmitting 25Gbps NRZ modulated signals over LAN WDM wavelengths spaced 4.5nm apart in O-band spectrum where chromatic dispersion is minimal
• Bidirectional diplexer filter technology multiplexes four Tx channels onto single fibre while simultaneously demultiplexing four Rx channels from opposite wavelength group, enabling full-duplex 100Gbps on one strand
• Host-based RS-FEC requirement (Reed-Solomon Forward Error Correction) provides error correction necessary to achieve 20km reach over G.652 single-mode fibre; without FEC enabled reach will be reduced
• Industrial temperature operation from -40°C cold start through -20°C to +85°C mission mode makes this transceiver suitable for outdoor cabinets, wireless backhaul, and other thermally demanding 5G and enterprise deployments
• Hot-swappable installation into QSFP28 ports with DOM monitoring accessible via I2C interface for proactive link health management and troubleshooting optical power budgets
• Single-fibre BiDi topology reduces fibre infrastructure cost and port density requirements compared to duplex LR4 solutions while maintaining equivalent 20km reach and 100Gbps throughput

Warranty

5-Year Advanced Warranty on All Blue Cable Co® Products

Blue Cable Co® offers a comprehensive 5-Year Advanced Warranty on all our branded products. Our advanced warranty ensures fast, hassle-free replacements to keep your network running smoothly. If a fault occurs, we’ll deliver a replacement part before you return the faulty item—minimising downtime and giving you complete peace of mind.

Choose Blue Cable Co® for reliable, high-quality network components backed by industry-leading warranty support.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

Also Known As

FAQs

Compatible SFP Selector

Technical Specifications

Brand: Blue Cable Co
BCC SKU: QSFP-100G-B20D4-I-BCC
Compatible Replacement For: QSFP-100G-B20D4-I
Compatibility: Cisco compatible
Lab Testing: Tested in Sydney, Australia
Warranty: 5-year advanced hardware replacement (Blue Cable Co)
Form Factor: QSFP28
Data Rate: 100Gbps
Fibre Type: Single-Mode (G.652)
Connector Type: LC Simplex
Direction: Downstream (pairs with QSFP-100G-B20U4-I upstream unit)
Tx Wavelengths: 1274, 1278, 1282, 1287 nm
Rx Wavelengths: 1296, 1300, 1304, 1309 nm
Spectral Band: O-band
Max Reach: Up to 20km (per datasheet, subject to fibre and link conditions)
Modulation: NRZ (Non-Return to Zero)
Forward Error Correction: Host-based RS-FEC required
DOM Support: Yes
Operating Temperature: -40°C cold start; -20°C mission mode to +85°C (industrial)
Power Consumption: 5W (-40 to 85°C range); 4.5W (0 to 70°C range)
Standards: QSFP28 MSA, IEEE 802.3cu (CAUI-4), SFF-8679, SFF-8665, SFF-8636

Also Known As

QSFP-100G-B20D4-I=

FAQs

Q: Will this work in place of the Cisco QSFP-100G-B20D4-I?
A: Yes. This transceiver is built to QSFP28 MSA specifications with the same CAUI-4 electrical interface, 100Gbps data rate, O-band wavelengths, and LC simplex connector as the Cisco QSFP-100G-B20D4-I. It is plug-and-play compatible and requires host-based RS-FEC to be enabled on the Cisco platform for 20km operation.

Q: What Cisco platforms support this transceiver?
A: This transceiver is compatible with Cisco switches and routers that support QSFP 100G ports and provide host-based RS-FEC. Refer to the Cisco 100 Gigabit Ethernet Transceiver Modules Compatibility Matrix for platform-specific confirmation. It has been tested in our Sydney lab against Cisco QSFP-compatible equipment.

Q: What is the difference between the downstream (B20D4-I) and upstream (B20U4-I) units and do I need both?
A: Yes, both are required. BiDi transceivers operate as a matched pair with opposite wavelength assignments. The downstream unit (QSFP-100G-B20D4-I-BCC) transmits at 1274/1278/1282/1287 nm and receives at 1296/1300/1304/1309 nm. The upstream unit (QSFP-100G-B20U4-I-BCC) has the reverse mapping. One unit must be installed at each end of the single-fibre link for bidirectional communication.

Q: Why does this transceiver require RS-FEC and what happens if FEC is not enabled?
A: The QSFP-100G-B20D4-I relies on host-based Reed-Solomon Forward Error Correction to achieve the specified 20km reach over G.652 single-mode fibre. RS-FEC corrects bit errors introduced by optical noise, dispersion, and attenuation across the link. Without RS-FEC enabled on both ends, maximum reach will be significantly reduced and bit error rate may exceed acceptable thresholds for stable 100Gbps operation.

Q: Can I mix this downstream transceiver with a different vendor's upstream BiDi transceiver?
A: BiDi transceivers must use matching wavelength pairs and diplexer filter specifications to interoperate. While industry-standard wavelength assignments improve cross-vendor compatibility, behaviour is not guaranteed. For best results, pair this downstream unit with the corresponding QSFP-100G-B20U4-I-BCC upstream transceiver or verify wavelength and MSA compliance with the alternate vendor before deployment.

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Coded and tested in our state of the art lab in Sydney

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Tested on real vendor hardware in Sydney

Every Blue Cable Co transceiver is coded for your platform and tested in our Sydney test rack on real vendor switches and firewalls before it ships. We check it is recognised and links up the same way the OEM optic does, so you don't find an "unsupported transceiver" error after it's installed.

Brands tested: Cisco, Meraki, Arista, Aruba, HPE, Juniper, Dell, Fortinet, Palo Alto, Check Point, Sophos, Moxa and NVIDIA. Speeds up to 100Gb.

  • 5 year replacement warranty
  • Sydney stock
  • Re-coding if you need it

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