Cisco QDD-4X100G-LR-S Transceiver Module

About Cisco QDD-4X100G-LR-S 400G QSFP-DD 4x100GBASE-LR1 10km Transceiver Module in Bangladesh

The Cisco QDD-4X100G-LR-S is a high-density 400G QSFP-DD optical transceiver designed to provide four independent 100GbE breakout connections over single-mode fiber. Supporting 100GBASE-LR1 over distances of up to 10km, this module is designed for data center, enterprise, cloud and high-performance networking environments that require long-reach 400G-to-100G connectivity.

The module uses four parallel single-mode fiber pairs and an MPO-12 APC optical connector. Cisco specifies a 1310nm optical wavelength and compliance with IEEE 802.3cu 100GBASE-LR1 and 400GAUI-8/CEI-56G-VSR-PAM4 electrical standards. FEC is performed on the host platform. :contentReference[oaicite:1]{index=1}

Cisco QDD-4X100G-LR-S Specifications & Features

Overview

The Cisco QDD-4X100G-LR-S provides a 400Gbps QSFP-DD interface that can operate as four 100GbE breakout links. This architecture allows a 400G-capable network platform to connect directly to multiple 100G devices, making it useful during network upgrades and high-density data center deployments.

Cisco specifies a maximum breakout link distance of 10km for the QDD-4X100G-LR-S. The module uses parallel single-mode fiber with an MPO-12 connector. :contentReference[oaicite:2]{index=2}

Buy Cisco QDD-4X100G-LR-S Transceiver in Bangladesh

Purchase the Cisco QDD-4X100G-LR-S 400G QSFP-DD 4x100GBASE-LR1 10km optical transceiver from Datacom Technologies (BD). We supply Cisco networking equipment, optical transceivers, enterprise switches, data center hardware and high-speed networking solutions in Bangladesh with competitive pricing, technical consultation and nationwide delivery.

Key Features

• 400Gbps aggregate network capacity
• 4 × 100GbE breakout capability
• 100GBASE-LR1 optical technology
• Up to 10km reach
• 1310nm wavelength
• Single-mode fiber support
• MPO-12 APC optical connector
• QSFP-DD form factor
• 400GAUI-8 electrical interface
• CEI-56G-VSR-PAM4 electrical technology
• Maximum power consumption of 12W
• Designed for high-density data center networking

Applications

• 400G Data Center Networking
• 4 × 100G Ethernet Breakout
• Cloud Data Centers
• Enterprise Core Networks
• High-Performance Computing
• AI Infrastructure Networks
• Data Center Spine-and-Leaf Architecture
• Long-Reach 100G Connectivity
• 400G Network Migration
• High-Density Ethernet Interconnects

400G to 4x100G Breakout

The key advantage of the QDD-4X100G-LR-S is its ability to provide four 100GbE breakout connections from a single 400G QSFP-DD port.

This allows organizations to deploy high-density 400G switching platforms while maintaining connectivity with existing 100G infrastructure. Cisco specifically identifies the module for 4×100G breakout applications to compatible 100G optical modules. :contentReference[oaicite:3]{index=3}

10km Long-Reach Connectivity

The QDD-4X100G-LR-S supports link lengths of up to 10km, making it appropriate for long-distance single-mode fiber connectivity between network switches, data center buildings and other network locations where short-reach multimode optics are insufficient.

Cisco's datasheet specifies 10km reach for 100GBASE-LR1 breakout operation and identifies the module as using parallel SMF. :contentReference[oaicite:4]{index=4}

100GBASE-LR1 Technology

The module uses four 100GBASE-LR1 optical lanes. Each 100G breakout connection is designed for long-reach single-mode fiber transmission.

Cisco specifies compliance with the IEEE 802.3cu 100GBASE-LR1 standard. :contentReference[oaicite:5]{index=5}

1310nm Optical Wavelength

The QDD-4X100G-LR-S operates at a nominal 1310nm wavelength over single-mode fiber. The 1310nm optical band is used for long-reach fiber networking applications.

MPO-12 APC Connector

The optical interface uses an MPO-12 APC connector. Cisco specifically identifies the QDD-4X100G-LR-S as requiring MPO-12 APC connectivity. :contentReference[oaicite:6]{index=6}

Correct polarity, fiber type and connector configuration are essential when installing parallel-fiber 400G/100G breakout links. Cisco's documentation specifically notes that the QDD-4X100G-FR-S and QDD-4X100G-LR-S require patch cords with Angled Physical Contact (APC) MPO connectors. :contentReference[oaicite:7]{index=7}

Single-Mode Fiber Support

The QDD-4X100G-LR-S is designed for single-mode fiber (SMF). Cisco's optical specifications identify G.652 fiber for this module and a maximum reach of 10km. :contentReference[oaicite:8]{index=8}

400GAUI-8 Electrical Interface

The module uses a 400GAUI-8 / CEI-56G-VSR-PAM4 host electrical interface. Cisco identifies this electrical architecture for the QDD-4X100G-LR-S and notes that the 400G Ethernet signal is carried over four parallel optical lanes, with one wavelength per lane. :contentReference[oaicite:9]{index=9}

FEC and Host Platform

For the QDD-4X100G-LR-S, FEC is performed on the host platform. This is an important consideration when verifying compatibility with a specific Cisco switch, router or networking platform. :contentReference[oaicite:10]{index=10}

Network Migration to 400G

The QDD-4X100G-LR-S can help organizations migrate from 100G to 400G networking. A single 400G port can provide four 100G breakout connections, allowing newer high-density switching platforms to connect to existing 100G infrastructure.

Cisco's documentation describes QSFP-DD breakout capability as a way to use newer 400G platforms while maintaining connectivity to existing 100G platforms. :contentReference[oaicite:11]{index=11}

Data Center and AI Infrastructure

High-density 400G optical modules are increasingly useful in modern data center and high-performance networking environments. The QDD-4X100G-LR-S provides long-reach 4×100G connectivity from a single QSFP-DD port, making it suitable for network architectures requiring high port density and long-distance fiber connectivity.

Optical Performance

Cisco's published optical specifications list 1310nm operation, G.652 SMF and a 10km maximum reach. :contentReference[oaicite:12]{index=12}

Power Consumption

The Cisco QDD-4X100G-LR-S has a specified maximum power consumption of 12W. This should be considered when planning switch power budgets and thermal capacity for high-density 400G deployments. :contentReference[oaicite:13]{index=13}

Standards Compliance

• IEEE 802.3cu 100GBASE-LR1
• 400GAUI-8
• CEI-56G-VSR-PAM4

Cisco identifies the QDD-4X100G-LR-S as compliant with IEEE 802.3cu for 100GBASE-LR1 and the 400GAUI-8/CEI-56G-VSR-PAM4 electrical standards. :contentReference[oaicite:14]{index=14}

Cisco QDD-4X100G-LR-S vs 400G-LR4

Compatibility Considerations

The QDD-4X100G-LR-S should be installed only in Cisco platforms and configurations that support this specific QSFP-DD module and its breakout functionality.

• Verify Cisco platform compatibility
• Verify QSFP-DD port support
• Verify 4×100G breakout support
• Use compatible MPO-12 APC cabling
• Use appropriate single-mode fiber
• Verify 100GBASE-LR1 interoperability
• Verify host-platform FEC requirements
• Confirm supported firmware/software

Cisco notes that QSFP-DD modules can interoperate with Cisco and third-party modules that comply with the same applicable standards, but exact platform and module compatibility should be checked using Cisco's interoperability and compatibility documentation. :contentReference[oaicite:15]{index=15}

Benefits

• 400Gbps aggregate bandwidth
• Four independent 100GbE breakout connections
• 10km long-reach connectivity
• 1310nm single-mode fiber transmission
• IEEE 802.3cu 100GBASE-LR1 compliance
• QSFP-DD high-density form factor
• MPO-12 APC connectivity
• Ideal for 400G network migration
• Suitable for data center and cloud networks
• Useful for high-density 100G connectivity

Why Buy from Datacom Technologies (BD)?

Datacom Technologies (BD) supplies Cisco networking equipment, optical transceivers, switches, routers, data center hardware and high-speed networking solutions in Bangladesh. Customers can receive competitive pricing, technical consultation, deployment assistance and nationwide delivery.

• Call/WhatsApp: +8801748173213
• Email: sales@datacom.com.bd
• Alternative Email: datacomtechnologiesbd@gmail.com
• Office: Tropical Center, 218, Dr. Kudroti Khuda Road, New Elephant Road, Dhaka-1205, Bangladesh

Frequently Asked Questions (FAQ)

Q1: What is the Cisco QDD-4X100G-LR-S?
The Cisco QDD-4X100G-LR-S is a QSFP-DD optical transceiver that provides 4×100GbE breakout from a 400G host port using 100GBASE-LR1 optics.

Q2: What is the total bandwidth?
The module provides an aggregate 400Gbps capacity through four 100GbE breakout connections.

Q3: What is the maximum transmission distance?
The QDD-4X100G-LR-S supports link lengths of up to 10km. :contentReference[oaicite:16]{index=16}

Q4: What optical standard does it support?
It supports 100GBASE-LR1 and complies with IEEE 802.3cu requirements. :contentReference[oaicite:17]{index=17}

Q5: What wavelength does it use?
The module operates at 1310nm. :contentReference[oaicite:18]{index=18}

Q6: What fiber does QDD-4X100G-LR-S use?
It uses single-mode fiber (SMF), with Cisco specifying G.652 fiber for the module. :contentReference[oaicite:19]{index=19}

Q7: What connector does it use?
It uses an MPO-12 APC optical connector. Cisco specifically requires APC MPO patch-cord connectivity for this module. :contentReference[oaicite:20]{index=20}

Q8: Can it connect a 400G port to four 100G ports?
Yes. The QDD-4X100G-LR-S is specifically designed for 4×100G breakout operation. :contentReference[oaicite:21]{index=21}

Q9: What is the maximum power consumption?
Cisco specifies maximum power consumption of 12W. :contentReference[oaicite:22]{index=22}

Q10: Is FEC performed inside the transceiver?
For this module, Cisco states that FEC is performed on the host platform. :contentReference[oaicite:23]{index=23}

Q11: Is QDD-4X100G-LR-S the same as a 400G-LR4 module?
No. Both can support 10km-class 400G connectivity, but QDD-4X100G-LR-S is designed for four 100GBASE-LR1 breakout links and uses MPO-12 APC, while QDD-400G-LR4-S is a native 400G-LR4 module using duplex LC.

Q12: Is QDD-4X100G-LR-S suitable for data centers?
Yes. Its 400G QSFP-DD form factor, 4×100G breakout capability and 10km SMF reach make it suitable for high-density data center networking.

Q13: Can it be used with third-party optics?
Cisco states that its QSFP-DD modules can interoperate with Cisco and third-party modules that comply with the same applicable standards, subject to platform compatibility. :contentReference[oaicite:24]{index=24}

Q14: What should I verify before purchasing?
Verify the Cisco host platform, QSFP-DD port support, 4×100G breakout capability, firmware/software compatibility, MPO-12 APC cabling and 100GBASE-LR1 interoperability.

Q15: Where can I buy Cisco QDD-4X100G-LR-S in Bangladesh?
You can contact Datacom Technologies (BD) for Cisco optical transceivers, networking equipment, data center hardware and high-speed Ethernet solutions with competitive pricing and nationwide delivery.