The Quad Small Form-factor Pluggable (QSFP) is a compact, hot-pluggable transceiver used for data communications applications. The form factor and electrical interface are specified by a multi-source agreement (MSA) under the auspices of the Small Form Factor Committee. It interfaces networking hardware (such as servers and switches) to a fiber optic cable or active or passive electrical copper connection. It is an industry format jointly developed and supported by many network component vendors, allowing data rates from 4x1 Gb/s for QSFP and 4x10 Gbit/s for QSFP+ and to the highest rate of 4x28 Gbit/s known as QSFP28 used for 100 Gbit/s links.
Video QSFP
Types
QSFP transceivers are available with a variety of transmitter and receiver types, allowing users to select the appropriate transceiver for each link to provide the required optical reach over multi-mode or single-mode fiber. QSFP modules are commonly available in several different categories:
- 4 x 1 Gbit/s QSFP
- The original QSFP document specified four channels carrying Gigabit Ethernet, 4GFC (FiberChannel), or DDR InfiniBand.
- 4 x 10 Gbit/s QSFP+
- QSFP+ is an evolution of QSFP to support four 10 Gbit/sec channels carrying 10 Gigabit Ethernet, 10GFC FiberChannel, or QDR InfiniBand. The 4 channels can also be combined into a single 40 Gigabit Ethernet link. It is usually for the application of Data center, 40G Ethernet, Infiniband, and other communications standards.
- 4 x 14 Gbit/s QSFP+ (QSFP14)
- The QSFP14 standard is designed to carry FDR InfiniBand, SAS-3. or 16G Fibre Channel
- 4 x 28 Gbit/s QSFP+ (QSFP28)
- The QSFP28 standard is designed to carry 100 Gigabit Ethernet, EDR InfiniBand. or 32G Fibre Channel. This transceiver type is also used with direct-attach breakout cables to adapt a single 100GbE port to four independent 25 gigabit ethernet ports (QSFP28-to-4x-SFP28). Sometimes this transceiver type is also referred to as "QSFP100" or "100G QSFP" for sake of simplicity.
Maps QSFP
Fanout
Switch and router manufacturers implementing QSFP ports in their products frequently allow for the use of a single QSFP port as four independent 10 gigabit ethernet connections, greatly increasing port density in a 1U height 24-port switch (24 40Gb ports x 4 = 96 10GbE).
Pins
QSFP has 38 pins with 4 high-speed TX pairs (CML-I) and 4 high-speed RX pairs (CML-O).
See also
- C Form-factor Pluggable (100 Gigabit Ethernet module)
- CXP (connector)
- OSFP transceiver slightly larger 400GbE transceiver standard
- Small form-factor pluggable transceiver (SFP)
References
External links
- SFF Committee
Source of the article : Wikipedia
0 Comments