QSFP to 4xSFP+ breakout cables split one 40G QSFP port into four 10G SFP+ connections, allowing a single 40G switch port to connect to four 10G servers or network devices.
| Pin | Name | Function | Type |
|---|---|---|---|
| QSFP | QSFP | 40G QSFP connection to switch | BUS |
| SFP1 | SFP+ 1 | 10G SFP+ to device 1 | BUS |
| SFP2 | SFP+ 2 | 10G SFP+ to device 2 | BUS |
| SFP3 | SFP+ 3 | 10G SFP+ to device 3 | BUS |
| SFP4 | SFP+ 4 | 10G SFP+ to device 4 | BUS |