Universal serial bus type C transmission line and transmission device

A USB type C transmission line, comprising:

• a switch;
• a host-to-host bridge;
• a first multiplexer;
• and
• a second multiplexer, wherein a first device coupled to the first multiplexer optionally communicates with a second device coupled to the second multiplexer through the host-to-host bridge, the first multiplexer, and the second multiplexer, or through the first multiplexer and the second multiplexer;
• wherein the first device optionally supplies power to the second device when the switch is turned on, or does not supply power to the second device when the switch is turned off.

A USB type C transmission device, comprising:

• a host-to-host bridge;
• and
• a switch;
• wherein a first device coupled to the USB type C transmission device communicates with a second device coupled to the USB type C transmission device optionally through the host-to-host bridge;
• wherein the first device optionally supplies power to the second device when the switch is turned on, or does not supply power to the second device when the switch is turned off.