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Introduction to transceivers used in the data center

The pluggable Transceivers is one of the main network components in the modern data center, based on the data rate structured cabling topology, different form factors transceivers like SFP, SFP+, XFP, QSFP+ SFP28, SFP56, CFP, CFP2, CFP4, QSFP28, QSFP56, QSFP-DD may be used.

The flowing list is about how to choose transceivers intra racks, inter racks, and for long span/inter buildings.

Intra-Rack

DAC Cables
10G SFP+ DAC
A 10G SFP+ DAC Direct Attach Cable is a Twinax cable solution with two copper-based conductors for transmitting electrical signals at short distances.
25G SFP28 DAC
A 25G SFP28 DAC Direct Attach Cable is a Twinax cable solution with two copper-based conductors for transmitting electrical signals at short distances.
40G QSFP+ DAC
40G QSFP+ PCC is passive Direct Attach Copper (DAC) cables with high-speed, cost-effective for 40G Ethernet applications.
100G QSFP28 DAC
The 100GE QSFP28 cable assemblies are high-performance, cost-effective I/O solutions for LAN, HPC, and SAN. The high-speed cable assemblies meet and exceed 100 Gigabit Ethernet, InfiniBand EDR, and temperature requirements for performance and reliability. The cables are compliant with SFF-8436 specifications and provide connectivity between devices using QSFP ports.
200G QSFP-DD DAC
A 200G QSFP-DD DAC Direct Attach Cable is a Twinax cable solution with two copper-based conductors for transmitting electrical signals at short distances.
400G QSFP-DD DAC
A 400G QSFP-DD DAC Direct Attach Cable is a Twinax cable solution with two copper-based conductors for transmitting electrical signals at short distances.
Breakout DAC Cables
40G QSFP+ to 4x 10G SFP+ DAC
The 40G QSFP+ to 4x 10G SFP+ DAC Cables are high performance and cost-effective for intra-rack split interconnects. It offers a low power consumption, short-reach interconnect applications.
100G QSFP28 to 4x 25G SFP28 DAC
The 100G QSFP28 to 4x 25G SFP28 DAC Cables are high performance and cost-effective for intra-rack split interconnects. It offers a low power consumption, short-reach interconnect applications.
AOC Cables
10G SFP+ AOC
The 10G SFP28 AOC Active Optical Cable has a transceiver at its respective ends, a combination of transmitter and receiver which is connected to a fiber cable for the transfer of optical signals. It is designed for 10G Ethernet links to reach up to 300m (OM3) over Multi-Mode Fiber (MMF).
25G SFP28 AOC
The 25G SFP28 AOC Active Optical Cable has a transceiver at its respective ends, a combination of transmitter and receiver which is connected to a fiber cable for the transfer of optical signals. It is designed for 25G Ethernet links to reach up to 70m (OM3) or 100m (OM4) over Multi-Mode Fiber (MMF).
Breakout AOC Cables
40G QSFP+ to 4x 10G SFP+ AOC
The 40G QSFP+ to 4x 10G SFP+ AOC Active Optical Cable has a transceiver at one end, and multiple transceivers at the other end, a combination of transmitter and receiver which is connected to a fiber cable for the transfer of optical signals. It is designed for 40GBASE-SR4 to 4x 10GBASE-SR Ethernet links reach up to 100m (OM3) or 150m (OM4) over Multi-Mode Fiber (MMF).
100G QSFP28 to 4x 25G SFP28 AOC
The 100G QSFP28 to 4x 25G SFP28 AOC Active Optical Cable has a transceiver at one end, and multiple transceivers at the other end, a combination of transmitter and receiver which is connected to a fiber cable for the transfer of optical signals. It is designed for 100GBASE-SR4 to 4x 25GBASE-SR Ethernet links reach up to 70m (OM3) or 100m (OM4) over Multi-Mode Fiber (MMF)
Transceivers
10G SFP+ SR
SFP+ is an enhanced version of the SFP transceiver, supporting data rates up to 10Gbps and fitting the SFP+ port of any brand of equipment. 10GBASE SFP+ SR Transceiver links reach up to 300m over dual multi-mode fibers
25G SFP28 SR
SFP28 is an enhanced version of the SFP+ transceiver, supporting data rates up to 25Gbps and fitting the SFP28 port of any brand of equipment. 25GBASE SFP28 SR Transceiver links reach up to 100m or 300m over dual multi-mode fibers
40G QSFP+ SR4
The 40G QSFP+ SR4 is an optical transceiver module designed for data center 40GBASE-SR4 Ethernet links reach up to 150m or 400m over 4 pairs of parallel MMF.
100G QSFP28 SR4
The 100GE QSFP28 SR4 is a hot-pluggable optical transceiver module that includes a standard version and a low error rate version. It is designed for data center 100GBASE-SR4 links reach up to 100m over 4 pairs of parallel MMF with FEC.
400G QSFP-DD SR4
The 400GE QSFP-DD SR8 is a series of pluggable optical transceiver modules designed for data center 400GBASE-SR8 Ethernet links reach up to 100m over 8 pairs of parallel MMF with FEC.

Inter-rack

AOC Cables
10G SFP+ AOC
25G SFP28 AOC
40G QSFP+ AOC
100G QSFP28 AOC
Transceivers
10G SFP+ SR
25G SFP28 SR
40G QSFP+ SR4
100G QSFP28 SR4
400G QSFP-DD SR4
400G QSFP-DD DR4

Inter-building/Long span

Transceivers
10G SFP+ LR, BiDi/CWDM/DWDM/Tunable
25G SFP28 LR
40G QSFP+ LR/ER
100G QSFP28 CWDM4/LR4/ER4/ZR
100G CFP2/CFP4
200G QSFP56 FR4
400G QSFP-DD FR8/LR8
CFP2-DCO
Data Center
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