FINISAR FTLC9551REPM 100GBASE-SR4 QSFP28 Transceiver

About FINISAR FTLC9551REPM 100GBASE-SR4 100m QSFP28 Optical Transceiver in Bangladesh

The FINISAR FTLC9551REPM is a high-performance 100Gbps QSFP28 optical transceiver designed for 100G Ethernet connectivity over parallel multimode fiber. It supports the IEEE 802.3bm 100GBASE-SR4 standard and uses four parallel 25Gb/s optical channels operating around 850nm.

The module is designed for short-distance data center and enterprise networking applications, providing up to 100 meters of transmission over OM4 multimode fiber. It uses a high-density MPO12 optical interface for the parallel transmit and receive lanes.

Finisar specifies a 103.1Gb/s aggregate bit rate, 4×25G electrical interface, 850nm VCSEL-based optics, I²C management, less than 3.5W power dissipation and a commercial case operating temperature of 0°C to +70°C. :contentReference[oaicite:1]{index=1}

FINISAR FTLC9551REPM 100G SR4 Specifications & Features

Overview

The FINISAR FTLC9551REPM provides 100Gbps Ethernet connectivity using parallel multimode-fiber technology. Four independent optical lanes, each operating at approximately 25Gb/s, combine to provide the 100Gbps aggregate connection.

This architecture is optimized for high-density data center environments, including spine-to-leaf links, switch-to-switch interconnects, aggregation uplinks and high-speed server connectivity.

Buy FINISAR FTLC9551REPM 100G SR4 QSFP28 Transceiver in Bangladesh

Purchase the FINISAR FTLC9551REPM 100GBASE-SR4 QSFP28 Optical Transceiver from Datacom Technologies (BD). We supply FINISAR optical transceivers, QSFP28 modules, SFP/SFP+ optics, fiber connectivity products and enterprise networking equipment in Bangladesh with competitive pricing, technical consultation and nationwide delivery.

Key Features

• 100Gbps Ethernet connectivity
• FINISAR FTLC9551REPM part number
• 100GBASE-SR4 support
• QSFP28 hot-pluggable form factor
• 103.1Gb/s aggregate data rate
• 850nm VCSEL optical technology
• 4 × 25Gb/s parallel optical lanes
• Multimode fiber operation
• Up to 70m over OM3
• Up to 100m over OM4
• MPO/MTP-12 optical connector
• I²C digital management interface
• Less than 3.5W power dissipation
• 3.3V single power supply
• 0°C to +70°C operating temperature

Applications

• 100GbE Data Center Networks
• Spine-to-Leaf Connectivity
• Switch-to-Switch Interconnects
• Data Center Aggregation
• High-Speed Ethernet Uplinks
• Enterprise Core Networks
• High-Performance Computing
• Server-to-Switch Connectivity
• 100G-to-4×25G Breakout Applications

100GBASE-SR4 Technology

The FTLC9551REPM follows the IEEE 802.3bm 100GBASE-SR4 architecture. Four parallel optical lanes operate at approximately 25Gb/s each to provide the aggregate 100Gbps Ethernet connection.

The parallel SR4 architecture is designed specifically for short-distance multimode-fiber networking and is widely used for high-bandwidth data center interconnects.

850nm VCSEL Technology

The FTLC9551REPM uses 850nm VCSEL-based optical transmitters. VCSEL technology provides an efficient solution for high-speed short-reach multimode optical communication.

Four optical lanes provide the parallel transmit and receive channels required for 100GBASE-SR4 operation.

70m OM3 / 100m OM4 Reach

The FTLC9551REPM supports up to 100 meters over OM4 multimode fiber and up to 70 meters over OM3 multimode fiber. :contentReference[oaicite:2]{index=2}

Actual achievable distance depends on fiber quality, modal bandwidth, connector insertion loss, patch-panel losses and the optical characteristics of the complete link.

MPO/MTP-12 Connector

The FTLC9551REPM uses a single MPO12 optical receptacle for its parallel optical lanes. A typical 100GBASE-SR4 connection uses four transmit fibers and four receive fibers.

Correct MPO polarity and lane mapping are essential for reliable operation. Use compatible MPO/MTP-12 multimode fiber cabling designed for 100G SR4 applications.

Four 25Gb/s Optical Lanes

The module uses four parallel optical channels, each supporting approximately 25Gb/s. Together they provide the 103.1Gb/s aggregate signaling rate specified for the module.

The host-side electrical interface is 4×25G CAUI-4, making the transceiver suitable for compatible 100GbE QSFP28 ports. :contentReference[oaicite:3]{index=3}

100G to 4×25G Breakout

Where supported by the host networking platform, the FTLC9551REPM can be used for 100G-to-4×25G breakout connectivity with appropriate MPO breakout cabling and compatible SFP28 endpoints.

Breakout support depends on the switch, firmware, port configuration, cable polarity and connected transceivers.

Digital Diagnostic Monitoring

The FTLC9551REPM provides digital diagnostic functions through its I²C management interface. Compatible networking equipment can retrieve transceiver identification and supported operational information through the management interface. :contentReference[oaicite:4]{index=4}

Power Consumption

Finisar specifies power dissipation of less than 3.5W, with operation from a single 3.3V power supply. :contentReference[oaicite:5]{index=5}

This makes the module suitable for high-density QSFP28 deployments in data center switches and routers.

Data Center Connectivity

The FTLC9551REPM is designed for short-distance 100GbE data center connectivity. Typical applications include spine-to-leaf links, switch uplinks, aggregation links and high-speed server infrastructure.

Its 100m OM4 capability is suitable for many intra-data-center optical connections without requiring long-distance single-mode optics.

Compatibility

The FTLC9551REPM is designed around the QSFP28 MSA and IEEE 802.3bm 100GBASE-SR4 / CAUI-4 specifications. :contentReference[oaicite:6]{index=6}

Nevertheless, verify the exact switch, router, server adapter or other host platform for supported 100G SR4 optics and vendor coding before installation.

A QSFP28 port supporting 100GbE does not necessarily guarantee acceptance of every vendor-coded QSFP28 module.

Optical Link Planning

For reliable 100G SR4 operation, check the complete optical path before deployment.

• OM3 or 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 Ethernet
• 100GBASE-SR4 support
• 850nm VCSEL technology
• Four parallel 25Gb/s optical lanes
• 70m OM3 reach
• 100m OM4 reach
• High-density MPO12 connectivity
• QSFP28 hot-pluggable form factor
• I²C digital diagnostics
• Less than 3.5W power dissipation
• Suitable for data center spine-leaf networks
• Supported 100G-to-4×25G breakout deployments

Why Buy from Datacom Technologies (BD)?

Datacom Technologies (BD) supplies FINISAR optical transceivers, QSFP28 modules, 100G SR4 optics, SFP/SFP+ modules, fiber 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 FINISAR FTLC9551REPM?
FTLC9551REPM is a 100Gbps QSFP28 optical transceiver designed for 100GBASE-SR4 Ethernet over parallel multimode fiber.

Q2: What is the maximum reach?
The module supports up to 100 meters over OM4 multimode fiber and 70 meters over OM3. :contentReference[oaicite:7]{index=7}

Q3: What wavelength does it use?
It uses 850nm VCSEL-based optical transmission.

Q4: What connector does it use?
It uses a single MPO12/MTP-12 optical receptacle.

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

Q6: How many optical lanes does it have?
It uses four parallel optical lanes at approximately 25Gb/s each.

Q7: Does it support digital diagnostics?
Yes. Digital diagnostics are available through the I²C management interface. :contentReference[oaicite:8]{index=8}

Q8: What is the power consumption?
Finisar specifies power dissipation below 3.5W.

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

Q10: Can it be used with OM3 fiber?
Yes. The specified OM3 reach is 70 meters, while OM4 supports up to 100 meters.

Q11: Can FTLC9551REPM be used for 100G-to-4×25G breakout?
It can be used in supported breakout configurations when the host switch supports 4×25G operation and compatible MPO breakout cabling and SFP28 modules are used.

Q12: Can it be used for a 10km link?
No. FTLC9551REPM is a short-range multimode SR4 optic. A suitable single-mode 100G optic such as CWDM4 or LR4 should be selected for longer links.

Q13: Is FTLC9551REPM compatible with every QSFP28 port?
No. The host platform must support 100GBASE-SR4 and any applicable vendor-coding or interoperability requirements.

Q14: Is FTLC9551REPM still manufactured?
The original FTLC9551REPM is now listed as obsolete by major component distributors. DigiKey identifies the part as no longer manufactured, while Mouser lists it as obsolete and shows newer Coherent alternatives. :contentReference[oaicite:9]{index=9}

Q15: Where can I buy FINISAR FTLC9551REPM in Bangladesh?
You can contact Datacom Technologies (BD) for genuine/remaining FINISAR FTLC9551REPM stock or compatible 100GBASE-SR4 QSFP28 alternatives.