- Brian
- September 6, 2023
- 7:32 am
John Doe
Answered on 7:32 am
In general, the letters refer to reach or optics technology, and the number refers to the number of optical channels:
SR8: Short Range 8. This transceiver supports 400G transmission over multimode fiber (MMF) with a maximum reach of 100 meters. It uses a MPO-16 connector and PAM4 modulation.
SR8-C: Short Range 8 Copper. This transceiver supports 400G transmission over copper cable with a maximum reach of 3 meters. It uses a QSFP-DD connector and PAM4 modulation.
SRBD: Short Range Bidirectional. This transceiver supports 400G transmission over MMF with a maximum reach of 70 meters. It uses a duplex LC connector and PAM4 modulation.
SR4: Short Range 4. This transceiver supports 400G transmission over MMF with a maximum reach of 100 meters. It uses a MPO-12 connector and PAM4 modulation.
DR4 / XDR4 / PLR4: Data Center Reach 4 / eXtended Data Center Reach 4 / Parallel Long Reach 4. These transceivers support 400G transmission over single-mode fiber (SMF) with a maximum reach of 500 meters / 2 kilometers / 10 kilometers respectively. They use a MPO-12 connector and PAM4 modulation.
FR4 / LR4: Fiber Reach 4 / Long Reach 4. These transceivers support 400G transmission over SMF with a maximum reach of 2 kilometers / 10 kilometers respectively. They use a duplex LC connector and PAM4 modulation.
2FR4: Two Fiber Reach 4. This transceiver supports 400G transmission over SMF with a maximum reach of 2 kilometers. It uses two duplex LC connectors and coherent modulation.
People Also Ask
The NVIDIA GB300 NVLink Liquid-Cooled Switch
At this year’s GTC conference, NVIDIA introduced its latest GB300 AI chip and AI server. However, detailed information on the GB300 liquid-cooled switch has been scarce. The following images of the GB300 NVLink liquid-cooled switch were provided by the overseas partner STH. Displayed at NVIDIA GTC 2025, the GB300 NVLink
Understanding the Benefits of a 48-Port Gigabit Ethernet PoE Switch
In contemporary networking, a 48-port Gigabit Ethernet Power over Ethernet (PoE) switch holds untold business value because of its flexibility and completeness. With the rising popularity of IP devices like cameras, VoIP phones, and wireless access points, there is an increasing need for a centralized system that can both power
Unlocking the Potential of a 16-Port PoE Switch: A Comprehensive Guide
Implementing the Power over Ethernet (PoE) technology has changed the activities of modern networks, as it provides data and power supply through a single cable. Of many PoE options, the 16-port PoE switch seems cost-effective for businesses and network managers as it is flexible and scalable. This guide illustrates the
Optical Transceiver Modules Overcome High Temperatures in the Era of High-Speed Data Centers
The rapid advancement of artificial intelligence (AI) and large language models has resulted in an unprecedented surge in demand for high-speed optical transceiver modules within data centers and AI clusters. The operational speeds of these modules have expanded significantly—from 100 Gbps, suitable for entry-level data center applications, to 400 Gbps, commonly employed
Understanding Switch Ports: A Comprehensive Guide to VLAN Assignments and Switch Port Configurations
Throughout history, communication and connection have greatly evolved. Today, it can be done in mere seconds all throughout the globe. Switch ports are a fundamental part of global communication. If configured properly, canals of information, including devices, can be organized into clusters, which reduces response time tremendously. To maximize efficiency,
The Ultimate Guide to Choosing a 4 Port PoE Switch
The impact of well-chosen 4-Port Power over Ethernet (PoE) switches on the efficiencies and capabilities of a network cannot be overstated. Be it in setting up a home office, or small business network, or administering surveillance systems, having a dependable PoE switch to supply data and power to devices is
Related Articles
800G SR8 and 400G SR4 Optical Transceiver Modules Compatibility and Interconnection Test Report
Version Change Log Writer V0 Sample Test Cassie Test Purpose Test Objects：800G OSFP SR8/400G OSFP SR4/400G Q112 SR4. By conducting corresponding tests, the test parameters meet the relevant industry standards, and the test modules can be normally used for Nvidia (Mellanox) MQM9790 switch, Nvidia (Mellanox) ConnectX-7 network card and Nvidia (Mellanox) BlueField-3, laying a foundation for
The NVIDIA GB300 NVLink Liquid-Cooled Switch
At this year’s GTC conference, NVIDIA introduced its latest GB300 AI chip and AI server. However, detailed information on the GB300 liquid-cooled switch has been scarce. The following images of the GB300 NVLink liquid-cooled switch were provided by the overseas partner STH. Displayed at NVIDIA GTC 2025, the GB300 NVLink
Understanding the Benefits of a 48-Port Gigabit Ethernet PoE Switch
In contemporary networking, a 48-port Gigabit Ethernet Power over Ethernet (PoE) switch holds untold business value because of its flexibility and completeness. With the rising popularity of IP devices like cameras, VoIP phones, and wireless access points, there is an increasing need for a centralized system that can both power
Unlocking the Potential of a 16-Port PoE Switch: A Comprehensive Guide
Implementing the Power over Ethernet (PoE) technology has changed the activities of modern networks, as it provides data and power supply through a single cable. Of many PoE options, the 16-port PoE switch seems cost-effective for businesses and network managers as it is flexible and scalable. This guide illustrates the
Optical Transceiver Modules Overcome High Temperatures in the Era of High-Speed Data Centers
The rapid advancement of artificial intelligence (AI) and large language models has resulted in an unprecedented surge in demand for high-speed optical transceiver modules within data centers and AI clusters. The operational speeds of these modules have expanded significantly—from 100 Gbps, suitable for entry-level data center applications, to 400 Gbps, commonly employed
Understanding Switch Ports: A Comprehensive Guide to VLAN Assignments and Switch Port Configurations
Throughout history, communication and connection have greatly evolved. Today, it can be done in mere seconds all throughout the globe. Switch ports are a fundamental part of global communication. If configured properly, canals of information, including devices, can be organized into clusters, which reduces response time tremendously. To maximize efficiency,
The Ultimate Guide to Choosing a 4 Port PoE Switch
The impact of well-chosen 4-Port Power over Ethernet (PoE) switches on the efficiencies and capabilities of a network cannot be overstated. Be it in setting up a home office, or small business network, or administering surveillance systems, having a dependable PoE switch to supply data and power to devices is