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.
JTOPTICS® 400G QSFP-DD AOC (active optical cable) is a 400 Gb/s parallel active optical cable, which transmits parallel 8×50 Gb/s PAM4 signals over multi-mode fiber (MMF) cables up to 100m. It is compliant with QSFP-DD MSA and the CMIS 4.0. The 400G QSFP56-DD AOC cables supports eight electrical int..
JTOPTICS 400G OSFP DAC (Passive Direct Attach Copper) enables high bandwidth 400G links and supports 400G Ethernet rate. It is high-speed, cost-effective alternatives to fiber optics in 400G Ethernet applications. The 400G OSFP DAC cable contains 16 high-speed copper pairs, each operating at data ra..
The Arista AOC-D-D-400G is a 400G Active Optical Cable (AOC) designed for high-speed data transfer between QSFP-DD (Quad Small Form-Factor Pluggable Double Density) ports. Utilizing OM3 multimode fiber, it supports 400Gbps Ethernet for short-range connections in data centers and high-performance net..
The Cisco QDD-400-AOC is a 400G Active Optical Cable (AOC) designed for high-speed, short-distance data transmission in data centers and enterprise networks. It features QSFP-DD (Quad Small Form-Factor Pluggable Double Density) connectors on both ends and uses OM3 multimode fiber to support 400Gbps ..
The Dell AOC-Q56DD-400G is a 400G Active Optical Cable (AOC) designed for connecting QSFP-DD (Quad Small Form-Factor Pluggable Double Density) ports using OM3 multimode fiber. This high-performance cable supports 400Gbps Ethernet, making it ideal for short-range data transmission in data centers, cl..
The Juniper QDD-400G-AOC is a 400G Active Optical Cable (AOC) designed to connect QSFP-DD (Quad Small Form-Factor Pluggable Double Density) ports using OM3 multimode fiber. This high-performance cable supports 400Gbps Ethernet, ideal for short-distance connections in data centers, cloud environments..
The Mellanox/Nvidia MFA1W00-W is a 400G Active Optical Cable (AOC) designed for high-speed connections between QSFP-DD (Quad Small Form-Factor Pluggable Double Density) ports. Utilizing OM3 multimode fiber, this AOC supports 400Gbps Ethernet, making it ideal for short-distance, high-bandwidth applic..
JTOPTICS 400G QSFP-DD DAC (Passive Direct Attach Copper) enables high-bandwidth 400G links and supports 400G Ethernet rate. It is high-speed, cost-effective alternatives to fiber optics in 400G Ethernet applications. The 400G QSFP-DD DAC cable contains 16 high-speed copper pairs, each operating at d..
JTOPTICS® 400Gbps LR4 transceiver module is a 400Gb/s Quad Small Form Factor Pluggable double density (QSFP DD) optical module designed for 10km optical communication applications. The module converts 8 channels of 50Gb/s (PAM4) electrical input data to 4 channels of CWDM optical signals, and ..
400G
QSFP-DD SR4 transceiver modules are designed for use in 400 Gigabit Ethernet
links on up to 100m of OM4 multi-mode fiber. They are compliant with the QSFP-DD
MSA and IEEE 802. 3db.The optical transceiver is RoHS compliant. Hot-pluggable
QSFP-DD Type 2 form factorSupports
425Gb/s aggregate ..
JTOPTICS® 400G QSFP56-DD AOC (active optical cable) is a 400 Gb/s parallel active optical cable, which transmits parallel 4X100 Gb/s PAM4 signals over multi-mode fiber (MMF) cables up to 100m. It is compliant with QSFP56-DD MSA and the CMIS 4.0. The 400G QSFP56-DD AOC cables supports eight electrica..
The Arista CAB-D-D-400G is a 400G DAC (Direct Attach Cable) designed to connect high-speed networking devices, such as switches and servers, in data centers. This cable features QSFP-DD (Quad Small Form-factor Pluggable Double Density) connectors on both ends, utilizing passive Twinax copper for dir..