400G Transceivers Guide
400G
transceivers, Active Optical Cables (AOCs), and Direct Attach Copper (DAC)
cables are critical components for high-speed networking in modern data
centers, enterprise networks, and high-performance computing environments.
These components support data rates of up to 400 Gigabits per second (Gbps),
providing the bandwidth necessary to handle today's data-intensive
applications.
Unleashing Ultra-High-Speed Connectivity with 400G Transceivers
JTOPTICS® 400G transceivers are engineered for next-generation data center environments requiring massive bandwidth and ultra-low latency. Ideal for hyperscale, cloud, and AI-driven infrastructures, they support high-density switch interconnects and accelerate data flow across core and spine-leaf networks. With optimized power efficiency and advanced modulation, 400G modules future-proof your network for data-intensive workloads and rapid scalability.
Frequently Asked Questions
400G QSFP-DD SR8 Transceivers
“SR” refers to 100m reach using multi-mode fiber, and “8” implies there are 8 optical channels. Each of the 8 optical channels from an SR8 module are carried on separate fibers, resulting in a total of 16 fibers (8 Tx and 8 Rx). Each optical channel operates at 50Gb/s. The SR8 module uses an MPO-16 APC connector to connect to 8 fiber pairs. The SR8 module can be configured for 400G- SR8, 2x 200G-SR4 and (operating at ½ rate) 2x 100G-SR4.
400G QSFP-DD SR4 Transceivers
“SR” refers to 50m reach using multimode fiber, and the “4” implies there are 4 optical channels. Each of the 4 optical channels are carried on separate fibers, resulting in a total of 4 pairs of fibers. Each optical channel operates at 100Gb/s. There are two IEEE defined standards for 100G/wave MMF optics: 400GBASE-SR4 (for 100m reach over parallel OM4 MMF), and 400GBASE-VR4 (for 50m reach over parallel OM4 MMF).
400G QSFP-DD DR4, XDR4 and PLR4 Transceivers
“DR” / “XDR” / “LR” refer to 500m / 2km / 10km reach using single-mode fiber, and “4” implies there are 4 optical channels. Each of the 4 optical channels are carried on separate fibers, resulting in a total of 4 pairs of fibers. Each optical channel operates at 100Gb/s. The DR4 / XDR4 / PLR4 modules use the widely deployed MPO-12 APC SMF connector to connect to 4 fiber pairs.
400G QSFP-DD FR4 / LR4 Transceivers
“FR” / “LR” refers to 2km / 10km reach using single-mode fiber, and “4” implies there are 4 optical channels. Unlike the DR4 and SR8, all 4 optical channels from an FR4 / LR4 are multiplexed onto one fiber, resulting in a total of 2 fibers from the module (1 Tx and 1 Rx). Each optical channel operates at 100Gb/s. The modules use a duplex LC optical connector.
The Arista Juniper QDD-400G-DAC is a high-performance 400G DAC (Direct Attach Cable) designed for data centers and enterprise networking environments. It connects devices with QSFP-DD (Quad Small Form-factor Pluggable Double Density) ports, supporting up to 400Gbps data transmission. Using passive T..
The Juniper QDD-400G-DR4-JN is a high-performance 400GBASE-DR4 QSFPDD optical transceiver designed for reliable data transmission over single-mode fiber (SMF). Operating at a wavelength of 1310nm and employing PAM4 modulation, it achieves a reach of up to 500 meters, making it suitable for a variety..
The Juniper QDD-400G-FR4-JN is a cutting-edge 400GBASE-FR4 QSFPDD optical transceiver designed for high-speed data transmission over single-mode fiber (SMF). Operating at a 1310nm wavelength and utilizing PAM4 modulation, it achieves a remarkable transmission distance of up to 2 kilometers, making i..
The Juniper QDD-4X100G-LR is a robust optical transceiver designed for high-speed data transmission, specifically supporting 4 x 100GBASE-LR configurations. Operating at a 1310nm wavelength, this QSFPDD module achieves an impressive reach of up to 10 kilometers over single-mode fiber (SMF), making i..
The Mellanox/Nvidia MCP1660-W is a 400G DAC (Direct Attach Cable) designed for connecting devices with QSFP-DD (Quad Small Form-Factor Pluggable Double Density) interfaces. This passive Twinax copper cable supports data transmission speeds of up to 400Gbps, making it ideal for high-performance compu..
The Nokia 3HE15211AA is a high-performance 400GBASE-SR8 QSFPDD optical transceiver designed for efficient data transmission over multimode fiber (MMF). Operating at an 850nm wavelength and utilizing PAM4 modulation, it achieves a transmission range of up to 100 meters. This transceiver supports 8x 5..
The Nvidia MMA1U00-WS is an advanced 400GBASE-SR8 QSFPDD optical transceiver, specifically designed for high-speed data transmission over multimode fiber (MMF). Operating at an 850nm wavelength and utilizing PAM4 modulation, it provides a reliable transmission distance of up to 100 meters. This vers..
The Nvidia MMS1V00-WM is a cutting-edge 400GBASE-DR4 QSFPDD optical transceiver designed for high-speed data transmission over single-mode fiber (SMF). Operating at a 1310nm wavelength and utilizing PAM4 modulation, it delivers a transmission reach of up to 500 meters, making it ideal for demanding ..
The Nvidia MMS1V90-WR is a high-performance optical transceiver designed for efficient data transmission in 4 x 100GBASE-LR configurations. Operating at a wavelength of 1310nm, this QSFPDD module offers an impressive reach of up to 10 kilometers over single-mode fiber (SMF), making it ideal for long..
JTOPTICS® QSFPDD 400GBASE DR4 is offers a transmission distance of up to 500 meter over a single mode fiber link. Quad Small Form Factor Pluggable Double Density (QSFP DD) transceiver with optical MPO 12/MTP 12 connector is designed for long range single mode 400 Gigabit Ethernet (400GbE) high speed..
JTOPTICS® 400Gb/s FR4 transceiver module is designed for high speed, long range 400 Gigabit Ethernet applications of up to 400 gigabits per second. The JT QSFP 400G FR4 is offered with optical LC Duplex Connector. This module utilizes the 400GBASE FR4 technology for transmission. With this transceiv..
JTOPTICS® 400GBASE SR8 100m is designed to operate over multimode fiber systems using a nominal wavelength of 850nm (MMF). It is compliant with the QSFP28 MSA and IEEE 802.3bm 100GBASE SR4. It integrates eight data lanes in each direction with 8x26.5625G. The electrical interface u..