Cisco QDD-4X100G-FR-S Transceiver Module

About Cisco QDD-4X100G-FR-S 400G QSFP-DD 4x100GBASE-FR1 2km Transceiver Module in Bangladesh

The Cisco QDD-4X100G-FR-S is a high-density 400G QSFP-DD optical transceiver designed to provide four independent 100GbE breakout connections over single-mode fiber. Supporting 4x 100GBASE-FR1 with a reach of up to 2km, it is designed for high-performance data center, cloud and enterprise networking environments.

The module uses an MPO-12 SMF APC connector and operates at a nominal 1310nm wavelength. Cisco specifies the module for 400GAUI-8/CEI-56G-VSR-PAM4 host signaling and IEEE 802.3cu 100GBASE-FR1 compliance. FEC is performed on the host platform. :contentReference[oaicite:2]{index=2}

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

Overview

The Cisco QDD-4X100G-FR-S enables a 400G QSFP-DD port to operate as four separate 100GbE breakout connections. This provides a practical way to connect a high-density 400G network interface with multiple 100G network interfaces.

Cisco specifies a maximum 100G breakout link length of up to 2km for this module. The optical interface uses four pairs of single-mode fiber with an MPO-12 connector. :contentReference[oaicite:3]{index=3}

Buy Cisco QDD-4X100G-FR-S in Bangladesh

Purchase the Cisco QDD-4X100G-FR-S QSFP-DD 4x100GBASE-FR1 2km Transceiver Module from Datacom Technologies (BD). We supply Cisco networking equipment, optical transceivers, data-center connectivity products and enterprise networking hardware in Bangladesh with competitive pricing, technical consultation and nationwide delivery.

Key Features

• 400Gbps QSFP-DD optical module
• 4 x 100GbE breakout capability
• 100GBASE-FR1 optical standard
• Up to 2km link reach
• 1310nm operating wavelength
• Single-mode fiber support
• MPO-12 SMF APC connector
• 400GAUI-8 host interface
• CEI-56G-VSR-PAM4 electrical signaling
• IEEE 802.3cu 100GBASE-FR1 compliant
• Designed for high-density data-center networking
• FEC performed on the host platform

Applications

• 400GbE Data Center Networks
• 4x100GbE Breakout Connectivity
• Cloud Infrastructure
• Enterprise Data Centers
• High-Performance Computing Networks
• Leaf-Spine Network Architecture
• Data Center Interconnects
• High-Density Network Uplinks
• Server and Storage Network Infrastructure

400Gbps QSFP-DD Connectivity

The QDD-4X100G-FR-S provides an aggregate 400Gbps optical interface in a QSFP-DD form factor. Its breakout architecture allows a compatible 400G port to provide four 100GbE connections.

This architecture can increase port density and simplify migration from 100GbE infrastructure toward 400GbE networking.

4x100GbE Breakout

The primary feature of the QDD-4X100G-FR-S is its ability to operate as a 4x100GbE breakout module. Cisco specifies interoperability with compatible QSFP-100G-DR, QSFP-100G-FR and QSFP-100G-LR modules for supported breakout configurations. :contentReference[oaicite:4]{index=4}

The breakout capability allows a high-density 400G switch port to connect with multiple 100G interfaces, making the module useful in modern data-center architectures.

100GBASE-FR1 Optical Standard

The QDD-4X100G-FR-S is compliant with the IEEE 802.3cu 100GBASE-FR1 standard. Cisco also specifies compliance with the 400GAUI-8/CEI-56G-VSR-PAM4 host-side standards. :contentReference[oaicite:5]{index=5}

The FR1 optical technology is intended for single-mode fiber links over distances of up to 2km with a 1310nm optical wavelength.

2km Single-Mode Fiber Reach

The Cisco QDD-4X100G-FR-S supports breakout link lengths of up to 2km over single-mode fiber. Cisco's datasheet identifies G.652 SMF as the applicable fiber type and 2km as the maximum specified reach. :contentReference[oaicite:6]{index=6}

Actual link performance depends on the fiber plant, connectors, patch panels, transceiver interoperability and network equipment.

1310nm Wavelength

The QDD-4X100G-FR-S operates at a nominal 1310nm wavelength. This optical wavelength is used for the parallel single-mode fiber lanes supporting the 100GBASE-FR1 breakout links. :contentReference[oaicite:7]{index=7}

MPO-12 SMF APC Connector

The optical interface uses an MPO-12 SMF APC connector. Cisco's current 400G transceiver datasheet identifies the QDD-4X100G-FR-S with an MPO-12 single-mode fiber APC interface. :contentReference[oaicite:8]{index=8}

Correct MPO polarity, fiber type, connector polish and cabling configuration are important when deploying the module.

400GAUI-8 Host Interface

The module uses the 400GAUI-8 / CEI-56G-VSR-PAM4 host electrical interface. Cisco specifies this host-side signaling for the QDD-4X100G-FR-S. :contentReference[oaicite:9]{index=9}

This enables the optical module to operate with compatible Cisco 400G QSFP-DD ports designed for the corresponding electrical interface.

FEC and Host Platform

Cisco specifies that FEC is performed on the host platform for the QDD-4X100G-FR-S. The network device and its software configuration therefore play an important role in maintaining a compliant and stable optical link. :contentReference[oaicite:10]{index=10}

Data Center Networking

The QDD-4X100G-FR-S is well suited to high-density data-center networks where 400G uplinks need to connect with multiple 100G interfaces.

It can be deployed in leaf-spine architectures, aggregation networks, high-performance computing environments and other applications requiring high-bandwidth optical connectivity.

400G to 100G Migration

One of the major benefits of the QDD-4X100G-FR-S is its breakout architecture. Cisco describes QSFP-DD breakout modules as enabling newer 400G platforms to connect to existing 100G platforms, supporting gradual migration toward 400GbE infrastructure. :contentReference[oaicite:11]{index=11}

This approach can increase network port density while allowing existing 100GbE equipment to remain part of the infrastructure.

Optical Breakout Interoperability

Cisco documents the QDD-4X100G-FR-S as interoperating in supported breakout configurations with QSFP-100G-DR, QSFP-100G-FR and QSFP-100G-LR optical modules. The specified reach for the QDD-4X100G-FR-S breakout is up to 2km. :contentReference[oaicite:12]{index=12}

Always verify the Cisco Module Interoperability Matrix and the target platform's supported transceiver list before deployment.

Cisco QDD-4X100G-FR-S vs QDD-4X100G-LR-S

The key difference is reach: FR1 is specified for up to 2km, while LR1 supports up to 10km. :contentReference[oaicite:13]{index=13}

Compatibility Considerations

The QDD-4X100G-FR-S should only be installed in Cisco platforms that explicitly support this transceiver or an equivalent supported module.

• Compatible Cisco 400G QSFP-DD port
• Supported Cisco software and firmware
• Compatible 400GAUI-8 host interface
• Single-mode fiber infrastructure
• MPO-12 APC-compatible cabling
• Correct MPO polarity
• Compatible 100GbE breakout transceivers

Transceiver compatibility should be verified against the exact Cisco platform and software release before deployment.

Benefits

• 400Gbps aggregate bandwidth
• Four independent 100GbE breakout links
• 2km single-mode fiber reach
• 100GBASE-FR1 compliance
• 1310nm optical wavelength
• MPO-12 SMF APC connectivity
• High-density QSFP-DD form factor
• Supports 400G-to-100G network migration
• Designed for enterprise and data-center networks
• Compatible breakout ecosystem with supported Cisco optics

Why Buy from Datacom Technologies (BD)?

Datacom Technologies (BD) supplies Cisco networking equipment, optical transceivers, data-center connectivity products and enterprise network hardware 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-FR-S?
The Cisco QDD-4X100G-FR-S is a 400G QSFP-DD optical transceiver that supports four 100GbE breakout connections using 100GBASE-FR1 over single-mode fiber.

Q2: What is the aggregate speed?
The module provides an aggregate 400Gbps interface and supports 4x100GbE breakout operation.

Q3: What is the maximum reach?
Cisco specifies a maximum breakout link reach of 2km. :contentReference[oaicite:14]{index=14}

Q4: What fiber does QDD-4X100G-FR-S use?
It uses single-mode fiber (SMF), with Cisco specifying G.652 fiber for the module. :contentReference[oaicite:15]{index=15}

Q5: What connector does it use?
The module uses an MPO-12 SMF APC connector. :contentReference[oaicite:16]{index=16}

Q6: What wavelength does it use?
The specified optical wavelength is 1310nm. :contentReference[oaicite:17]{index=17}

Q7: What optical standard does it support?
It supports 100GBASE-FR1 and is compliant with IEEE 802.3cu. :contentReference[oaicite:18]{index=18}

Q8: Can it be used as 4x100G breakout?
Yes. Cisco specifically identifies QDD-4X100G-FR-S as a 4x100G breakout module. :contentReference[oaicite:19]{index=19}

Q9: Can QDD-4X100G-FR-S connect to 100G-FR modules?
Yes. Cisco documents supported interoperability with QSFP-100G-DR, QSFP-100G-FR and QSFP-100G-LR modules in breakout configurations. :contentReference[oaicite:20]{index=20}

Q10: Is QDD-4X100G-FR-S suitable for data centers?
Yes. Its 400G QSFP-DD form factor and 4x100G breakout capability make it suitable for high-density data-center and cloud networking environments.

Q11: Is it the same as QDD-4X100G-LR-S?
No. Both provide 4x100G breakout, but FR-S is specified for up to 2km, while LR-S is specified for up to 10km. :contentReference[oaicite:21]{index=21}

Q12: Where can I buy Cisco QDD-4X100G-FR-S in Bangladesh?
You can contact Datacom Technologies (BD) for Cisco optical transceivers, switches, routers and data-center networking equipment with competitive pricing and nationwide delivery.