Transmitting device, reception device, and optical-electrical composite cable

A reception device comprising:

• a connector receptacle unit connected to an optical-electrical composite cable, wherein
• the connector receptacle unit includes
• a first electrode group,
• a second electrode group provided at a position rotated from the first electrode group by 180 degrees about a center of a main body of the connector receptacle unit as a reference,
• a first connection unit group for receiving optical signals, and
• a second connection unit group for receiving optical signals provided at a position rotated from the first connection unit group for receiving optical signals by 180 degrees about the center of the main body of the connector receptacle unit as a reference.

An optical-electrical composite cable comprising:

• a transmission-side connector plug connected to a transmitting device, wherein
• the transmission-side connector plug includes
• a transmission-side electrode group connected to a first electrode group or a second electrode group of a connector receptacle unit of the transmitting device, and
• an optical fiber group connected to a connection unit group for transmitting optical signals of the connector receptacle unit of the transmitting device.