I think it is because of the second dot. Can you help me to solve this?
You can try this:
The direct predecessor to the T4 — indeed a testbed for it — is Microsoft's T3 connector. And, just to put that in perspective, says Dr. Christopher Lee, it's "pre-dating the USB 2.0 spec and not being an industry standard," but is nonetheless "widely supported in the OS community and the wider industry."
Lee also thinks that T3 fits in with USB 2.0's other improvements. The higher clock rates allow for better USB transfers (i.e. the higher number of bits per second you can send/receive), and also for higher numbers of connections. Microsoft also took on the challenge of reversing-engineer USB 3.0's specifications and tailoring T3 to do the same. To that end, says Lee, T3 has a maximum of 6 ports and 6 connect/disconnect cycles, with a maximum of 250ms per cycle. That's quite close to what the USB 3.0 spec calls for, although there's a tradeoff: USB 3.0 allows for much higher maximum data throughput (more than 3Gbps) and up to 480Mbps.
Microsoft's T4 connector is larger than the T3, with support for two SuperSpeed USB 3.0 ports. You can see the design — which, like T3, uses metal screw terminals, so you can't get it mistaken for a USB 3.0 connection — in the gallery at the bottom of this post. The T4 is listed as being the successor to the T3, but Lee 0b46394aab