About Ciena QSFP28-SR4 100GBASE-SR4 100m QSFP28 Optical Transceiver in Bangladesh
The Ciena QSFP28-SR4 is a 100Gbps short-range optical transceiver designed for high-speed Ethernet connectivity over multimode fiber. Based on the 100GBASE-SR4 standard, the module uses four parallel 25Gbps optical lanes at 850nm and provides up to 100 meters of reach over OM4 multimode fiber.
The QSFP28-SR4 uses an MTP/MPO-12 optical connector and is designed for short-distance 100GbE applications such as data center interconnects, server rooms, enterprise core networks and switch-to-switch connectivity.
Ciena-compatible versions of the QSFP28-SR4 are specified with 850nm VCSEL transmitters, PIN receivers, DDM support and QSFP28 form-factor compatibility. Current compatibility listings specify 100m over OM4 and 70m over OM3 multimode fiber. ([Ciena-compatible QSFP28-SR4](https://edgeoptic.com/products/ciena/qsfp28-sr4))
Ciena QSFP28-SR4 100G Transceiver Specifications & Features
| Specification | Details |
|---|
| Brand | Ciena |
| Model | QSFP28-SR4 |
| Data Rate | 100Gbps |
| Ethernet Standard | 100GBASE-SR4 |
| Form Factor | QSFP28 |
| Wavelength | 850nm |
| Fiber Type | Multimode Fiber (MMF) |
| Reach | 70m over OM3 / 100m over OM4 |
| Connector | MTP/MPO-12 |
| Optical Channels | 4 × 25Gbps |
| Transmitter | 850nm VCSEL |
| Receiver | PIN photodiode |
| DDM / DOM | Supported |
| Modulation | NRZ |
| Electrical Interface | CAUI-4 |
| Operating Temperature | Typically 0°C to +70°C |
Overview
The Ciena QSFP28-SR4 provides high-density 100GbE connectivity for short optical links. Its four-lane architecture carries four 25Gbps channels in parallel, delivering an aggregate 100Gbps data rate.
The module is optimized for multimode fiber infrastructure commonly used inside data centers and enterprise server rooms. With a reach of up to 100m over OM4, it is suitable for switch-to-switch, switch-to-server and spine-to-leaf connectivity within short-distance environments.
Buy Ciena QSFP28-SR4 100G Module in Bangladesh
Purchase the Ciena QSFP28-SR4 100GBASE-SR4 QSFP28 Optical Transceiver from Datacom Technologies (BD). We supply Ciena-compatible optical transceivers, QSFP28 modules, SFP/SFP+ optics and enterprise networking equipment in Bangladesh with competitive pricing, technical consultation and nationwide delivery.
Key Features
- 100Gbps high-speed Ethernet connectivity
- 100GBASE-SR4 optical standard
- QSFP28 compact form factor
- 850nm VCSEL optical technology
- 4 × 25Gbps parallel optical channels
- Multimode fiber support
- 70m reach over OM3
- 100m reach over OM4
- MTP/MPO-12 optical connector
- PIN photodiode receiver
- Digital Diagnostic Monitoring
- NRZ modulation
- QSFP28 MSA compatibility
- Suitable for high-density data center networking
Applications
- 100GbE Data Center Networks
- Spine-to-Leaf Connectivity
- Top-of-Rack Switch Interconnects
- Enterprise Core Networks
- Server Room Networks
- High-Performance Computing
- Campus Network Core Connectivity
- Switch-to-Switch Links
- 100G to 4 × 25G Breakout Applications
100GBASE-SR4 Technology
The QSFP28-SR4 follows the 100GBASE-SR4 architecture, using four parallel optical lanes. Each lane carries approximately 25Gbps, producing a total aggregate bandwidth of 100Gbps.
The short-reach SR4 architecture is optimized for multimode fiber and is particularly useful inside data centers where fiber runs are generally much shorter than metro or long-haul connections.
850nm Optical Wavelength
The module operates at a nominal wavelength of 850nm using VCSEL technology. The 850nm wavelength is widely used for short-distance multimode-fiber networking because of its suitability for high-speed data center optical links.
Each of the four optical lanes operates independently at approximately 25Gbps before being combined into the 100Gbps aggregate interface.
Multimode Fiber Support
The Ciena QSFP28-SR4 is designed for multimode fiber rather than single-mode fiber.
Current Ciena-compatible specifications identify a maximum distance of 70m on OM3 and 100m on OM4. Actual distance depends on fiber quality, connector losses, installation conditions and the optical specifications of the connected modules. :contentReference[oaicite:1]{index=1}
MTP/MPO-12 Connector
The QSFP28-SR4 uses an MTP/MPO-12 connector for its parallel optical lanes. The MPO interface allows multiple transmit and receive fibers to be carried through a single high-density connector.
For a standard 100G SR4 point-to-point link, four fibers are used for transmit and four for receive, while the remaining positions in an MPO-12 connector may remain unused depending on the cabling design. :contentReference[oaicite:2]{index=2}
Four 25Gbps Optical Lanes
The QSFP28-SR4 contains four parallel optical channels, each operating at approximately 25Gbps. This parallel architecture provides the 100Gbps aggregate Ethernet data rate.
The module can also be used in supported breakout configurations to connect one 100GbE QSFP28 port to four 25GbE interfaces, subject to switch, transceiver and cabling compatibility.
VCSEL Transmitter and PIN Receiver
The optical transmitter uses an 850nm VCSEL array, while the receiver uses PIN photodetectors. This combination is commonly used for short-range 100G multimode-fiber networking.
VCSEL technology provides an efficient optical solution for the short distances targeted by 100GBASE-SR4.
Digital Diagnostic Monitoring
The QSFP28-SR4 supports Digital Diagnostic Monitoring (DDM/DOM), allowing compatible Ciena networking equipment to monitor transceiver operating parameters.
Available monitoring information can include optical transmit and receive power, temperature, voltage and other module diagnostics depending on the host platform and software.
Data Center Connectivity
The Ciena QSFP28-SR4 is particularly suitable for high-density data center environments where 100Gbps connectivity is required across relatively short distances.
Typical deployments include spine-to-leaf connections, leaf-to-leaf links, aggregation links and other high-bandwidth switch interconnects.
100G to 4 × 25G Breakout
Supported 100GBASE-SR4 QSFP28 modules can be used for breakout connectivity between one 100GbE port and four 25GbE ports using appropriate MPO breakout cabling.
Breakout operation depends on the connected switch hardware, network operating system, port configuration and supported transceiver modes.
Ciena QSFP28-SR4 vs LR4
| Feature |
QSFP28-SR4 |
QSFP28-LR4 |
| Data Rate |
100Gbps |
100Gbps |
| Wavelength |
850nm |
1310nm LAN-WDM |
| Fiber |
MMF |
SMF |
| Typical Reach |
70m OM3 / 100m OM4 |
Up to 10km |
| Connector |
MTP/MPO-12 |
Duplex LC |
| Typical Application |
Data center / short reach |
Longer campus / metro links |
The SR4 should be selected for short-distance multimode-fiber links, while LR4 is intended for substantially longer single-mode-fiber connections.
Optical Link Planning
The advertised 100m OM4 distance assumes suitable compliant multimode fiber and optical conditions. Actual link performance depends on the complete fiber path.
- Fiber grade
- Fiber length
- Connector quality
- MPO insertion loss
- Fiber polarity
- Patch-panel configuration
- Transceiver optical budget
- Host-device compatibility
For data center installations, ensure the MPO polarity and fiber lane mapping are correct before bringing the 100GbE link online.
Benefits
- 100Gbps high-speed connectivity
- Compact QSFP28 form factor
- 850nm VCSEL technology
- Four 25Gbps parallel optical lanes
- Up to 100m over OM4
- Up to 70m over OM3
- High-density MTP/MPO connectivity
- DDM/DOM monitoring
- Suitable for data center spine-leaf networks
- Supports compatible 100G-to-4×25G breakout applications
Why Buy from Datacom Technologies (BD)?
Datacom Technologies (BD) supplies Ciena-compatible optical transceivers, QSFP28 modules, SFP/SFP+ optics, 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 the Ciena QSFP28-SR4?
The Ciena QSFP28-SR4 is a 100Gbps QSFP28 optical transceiver designed for 100GBASE-SR4 short-range Ethernet links over multimode fiber.
Q2: What wavelength does the QSFP28-SR4 use?
It uses an 850nm optical wavelength.
Q3: What is the maximum reach?
The commonly specified reach is up to 100m over OM4 multimode fiber and 70m over OM3. :contentReference[oaicite:3]{index=3}
Q4: What connector does it use?
The standard SR4 implementation uses an MTP/MPO-12 connector.
Q5: Does it use single-mode or multimode fiber?
It uses multimode fiber (MMF), typically OM3 or OM4.
Q6: How many optical lanes does it have?
It has four parallel optical lanes, each carrying approximately 25Gbps.
Q7: Does it support DDM?
Yes. Ciena-compatible QSFP28-SR4 listings specify Digital Diagnostic Monitoring support. :contentReference[oaicite:4]{index=4}
Q8: Can the QSFP28-SR4 connect to a 25G SFP28 port?
It can be used in supported 100G-to-4×25G breakout configurations, but the switch, breakout cable, port configuration and optics must all support the required mode.
Q9: Is QSFP28-SR4 suitable for data centers?
Yes. It is specifically suited to short-distance, high-bandwidth data center and enterprise networking applications.
Q10: What is the difference between SR4 and LR4?
SR4 uses 850nm multimode fiber and is intended for short distances up to approximately 100m on OM4. LR4 uses 1310nm single-mode fiber and is intended for links up to approximately 10km.
Q11: Can I use an SR4 optic with single-mode fiber?
No. SR4 is designed for multimode fiber and its optical budget is intended for short-range MMF operation.
Q12: Where can I buy Ciena QSFP28-SR4 in Bangladesh?
You can contact Datacom Technologies (BD) for Ciena-compatible QSFP28-SR4 modules, 100G optics, SFP/SFP+ transceivers and enterprise networking products with competitive pricing and nationwide delivery.
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