FINISAR 100G QSFP28 Optical Transceiver Module

About FINISAR FTLC9555SEPM 100GBASE-SR4 100m QSFP28 Optical Transceiver in Bangladesh

The FINISAR FTLC9555SEPM is a high-performance 100Gbps QSFP28 optical transceiver designed for short-distance, high-bandwidth networking over multimode fiber. It supports 100GBASE-SR4 Ethernet and uses four parallel 25Gbps optical lanes operating around 850nm.

Designed for data center and enterprise networking environments, the FTLC9555SEPM provides up to 100 meters of transmission over OM4 multimode fiber. The module uses a high-density MPO12 optical interface and is suitable for switch-to-switch, spine-to-leaf and other short-reach 100GbE connections.

Finisar specifies the FTLC9555SEPM as a hot-pluggable QSFP28 module with less than 2.5W power dissipation, a commercial operating temperature range of 0°C to 70°C and I²C-based digital diagnostic functions. It also supports 128G Fibre Channel and 4×28G OTN applications. :contentReference[oaicite:2]{index=2}

FINISAR FTLC9555SEPM 100G QSFP28 Specifications & Features

Overview

The FINISAR FTLC9555SEPM is designed to deliver high-density 100Gbps optical connectivity using parallel multimode-fiber technology. Four independent optical lanes operate at approximately 25Gbps each to create a 100Gbps aggregate Ethernet connection.

Its short-reach 850nm architecture makes it particularly suitable for data center environments where OM3 or OM4 multimode fiber is already installed.

Buy FINISAR 100G QSFP28 Optical Transceiver in Bangladesh

Purchase the FINISAR FTLC9555SEPM 100GBASE-SR4 QSFP28 Optical Transceiver from Datacom Technologies (BD). We supply FINISAR optical transceivers, QSFP28 modules, SFP/SFP+ optics and data center networking products in Bangladesh with competitive pricing, technical consultation and nationwide delivery.

Key Features

• 100Gbps Ethernet connectivity
• FINISAR FTLC9555SEPM
• QSFP28 hot-pluggable form factor
• 100GBASE-SR4 support
• 850nm VCSEL technology
• 4 × 25Gbps parallel optical lanes
• Multimode fiber operation
• Up to 100m over OM4 fiber
• MPO12 optical connector
• I²C digital diagnostic interface
• Less than 2.5W power dissipation
• 0°C to +70°C commercial temperature range
• 3.3V single power supply
• 128G Fibre Channel support
• 4×28G OTN support

Applications

• 100GbE Data Center Networks
• Spine-to-Leaf Connectivity
• Switch-to-Switch Interconnects
• Data Center Aggregation
• High-Performance Computing
• Enterprise Core Networks
• 100G Ethernet Uplinks
• 128G Fibre Channel
• 4×28G OTN Client Links

100GBASE-SR4 Technology

The FTLC9555SEPM uses the 100GBASE-SR4 parallel optical architecture. Instead of carrying 100Gbps over a single optical wavelength, the module uses four independent optical lanes operating at approximately 25Gbps each.

This architecture is optimized for short-distance multimode-fiber connections and provides a compact, high-density solution for modern data center switching.

850nm VCSEL Technology

The FTLC9555SEPM uses four 25Gbps 850nm VCSEL-based transmitters. VCSEL technology is widely used for short-range multimode optical networking because of its suitability for high-speed data center links.

100m OM4 Multimode Reach

Finisar specifies a maximum link length of 100 meters on OM4 multimode fiber. The actual usable distance depends on fiber quality, modal bandwidth, connector losses, patch-panel losses and the complete optical budget. :contentReference[oaicite:3]{index=3}

For longer distances, a single-mode 100G optic such as LR4, FR or ER4 should be selected according to the required link distance.

MPO12 Connector

The FTLC9555SEPM uses a single MPO12 optical receptacle for its parallel optical lanes. This high-density connector is commonly used in structured data center cabling systems.

Correct MPO polarity and lane mapping are essential when deploying SR4 modules. The optical cable should be selected according to the transceiver's transmit and receive lane configuration.

Four 25Gbps Optical Lanes

The transceiver uses four parallel optical channels, each operating at approximately 25Gbps for 100G Ethernet applications.

This parallel architecture also makes compatible 100G-to-4×25G breakout applications possible when supported by the host switch and appropriate MPO breakout cabling.

Digital Diagnostic Monitoring

Finisar provides digital diagnostic functions through the module's I²C management interface. Compatible network equipment can retrieve transceiver identification and operational monitoring information through this interface. :contentReference[oaicite:4]{index=4}

Low Power Consumption

The FTLC9555SEPM has specified power dissipation of less than 2.5W. This makes it suitable for high-density QSFP28 deployments where multiple 100G optical modules operate within the same switch or networking platform. :contentReference[oaicite:5]{index=5}

Data Center Connectivity

The FTLC9555SEPM is particularly well suited to data center environments. Typical applications include spine-to-leaf connections, switch uplinks, aggregation links and high-speed server infrastructure.

Its 100m OM4 reach is appropriate for many intra-data-center fiber runs while its compact QSFP28 form factor allows high port density.

100G Ethernet and Fibre Channel

Unlike a single-purpose 100GbE module, the FTLC9555SEPM is a multirate optical platform. Finisar specifies support for 100GBASE-SR4 Ethernet, 128G Fibre Channel and 4×28G OTN applications. :contentReference[oaicite:6]{index=6}

FINISAR 100G QSFP28 Family

FINISAR has produced multiple 100G QSFP28 optical modules, so the exact part number should always be checked before ordering.

These examples demonstrate why the exact FINISAR part number matters. For example, FTLC1154RDPL is a 10km 1310nm LR4 module, while FTLC4353RHPL is a 500m 1311nm DR module. :contentReference[oaicite:7]{index=7}

Compatibility

The FTLC9555SEPM is a standardized QSFP28 optical module, but host-device compatibility should still be verified before purchase.

Check the exact switch, router, server adapter or storage platform for supported QSFP28 transceiver coding, optical standard, firmware and port configuration.

Optical Link Planning

For reliable 100G SR4 operation, the complete optical path should be considered before deployment.

• OM3/OM4 fiber grade
• Fiber length
• Modal bandwidth
• MPO insertion loss
• MPO polarity
• Fiber lane mapping
• Patch-panel losses
• Optical power budget
• Host-device compatibility

Benefits

• 100Gbps high-speed connectivity
• QSFP28 high-density form factor
• 100GBASE-SR4 support
• 850nm VCSEL technology
• Four parallel 25Gbps optical lanes
• Up to 100m over OM4 MMF
• MPO12 high-density connector
• I²C digital diagnostics
• Less than 2.5W power dissipation
• 100G Ethernet support
• 128G Fibre Channel support
• 4×28G OTN support

Why Buy from Datacom Technologies (BD)?

Datacom Technologies (BD) supplies FINISAR optical transceivers, QSFP28 modules, SFP/SFP+ optics, data center connectivity products and enterprise networking equipment 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 FINISAR FTLC9555SEPM?
It is a multirate 100G QSFP28 optical transceiver supporting 100GBASE-SR4 over multimode fiber.

Q2: What is the maximum reach?
Finisar specifies up to 100 meters on OM4 multimode fiber. :contentReference[oaicite:8]{index=8}

Q3: What wavelength does it use?
The module uses 850nm VCSEL-based optical transmitters.

Q4: What connector does it use?
It uses an MPO12 optical receptacle.

Q5: Does it use single-mode or multimode fiber?
The FTLC9555SEPM is designed for multimode fiber.

Q6: How many optical lanes does it use?
It uses four parallel optical lanes for 100G Ethernet, with approximately 25Gbps per lane.

Q7: Does it support digital diagnostics?
Yes. Digital diagnostic functions are available through the I²C management interface.

Q8: What is the power consumption?
Finisar specifies power dissipation of less than 2.5W.

Q9: What is the operating temperature?
The commercial case temperature range is 0°C to +70°C.

Q10: Can it be used with OM3 fiber?
The module is specified for 100m on OM4. OM3 can be used for shorter SR4 links, with the actual maximum distance determined by the fiber's optical characteristics and link budget.

Q11: Can it be used for 100G-to-4×25G breakout?
Compatible 100GBASE-SR4 deployments can support 4×25G breakout when the host switch, port configuration and MPO breakout cable support this mode.

Q12: Is every FINISAR 100G QSFP28 module the same?
No. FINISAR has multiple 100G QSFP28 variants, including SR4, LR4, CWDM4, DR and FR models with different wavelengths, fiber types, connectors and transmission distances. :contentReference[oaicite:9]{index=9}

Q13: Where can I buy FINISAR 100G QSFP28 modules in Bangladesh?
You can contact Datacom Technologies (BD) for FINISAR 100G QSFP28 optical transceivers, including SR4, LR4 and other compatible variants.