Standardized as "QSFP+" and "SFF-8436" of 10Gbps x 4 that raised 10 times
As shown in the following table listed last time, the next standard of "SFP28" is "QSFP+".Originally, the "QSFP (QUAD SFP)" standard that supported 4Gbps was released in November 2006 as "SFF-8438".
| 規格名 | 速度 |
| SFP28 | 25Gbps |
| QSFP+ | 40Gbps |
| SFP56 | 50Gbps |
| SFP-DD | 100Gbps |
| QSFP28 | 100Gbps |
4Gbps is not in Ethernet specifications, but this is the main use of FiberChannel's 2GFC/4GFC, and Infiniband 4X.In short, the four SFPs are summarized in one module, and when you look at the signal line, the 1Gbps signal is divided into a 38 -pin connector.
QSFPのピン配置。38ピンとなり、ここにTX/RXともに1～4ピンが並んでいることが分かる。出典はSFF-8438のFigure2モジュール形状のレンダリング画像例。SFPに比べてやや横長になった。出典はSFF-8438のFigure6In order to put this connector, QSFP has a slightly larger width as shown on the right.45 x 13 of SFP.7 × 8.From 6mm, 52 in QSFP.4x18.35 × 8.It is larger to 5.By the way, in the previous standard, SFP28/SFP56/SFP-DD has SFP/SFP+and QSFP+/QSFP28/DD has the same dimensions as QSFP.
Returning to the story, QSFP+is the one that raised the signal speed of this QSFP to 10 Gbps, 10 times.This was standardized as "SFF-8436".This SFF-8436 actually has 3.Starting from 5 and 1.It is unknown that 0 was released, but when this release was released from Molex on November 16, 2009, perhaps 1 at this time..I think 0 was released.
最初に見た時には「蓋？」とか思ってしまった。出典はSFF-8436のFigure6In addition to 40/10/1GBE, it was used extensively because it could be used in FiberChannel's 10/8/4/2 GFC, INFINIBAND SDR/DDR/QDR 4X/2x/1x.By the way, in SFF-8436, the module is defined in the shape of the right.
This lid is a grip, in short, it seems that it is more convenient to have a grip (or if not) when pulling out the module from the device.The grip itself is not included in the specifications of the SFF-8436, it is made of metal or elastomer, and it is fine if the module meets the EMI and thermal design with the addition of it.
In fact, for example, a grip with a resin that is easy to pull with a finger, such as the FS Cisco compatible QSFP+module, is generally used.
