The iPod dock connector is the plug used to connect an iPod to its dock, just as the name implies. It was originally developed by JAE according to the iPod's specifications. The first version of the iPod dock connector was made available with the third generation (3G) iPod.
With the iPod dock connector, a large amount of functionality can be achieved. The dock connector can allow the iPod to be connected to USB or Firewire ports on a computer, to a stereo with the use of a line-out connector, or to a serial device. Control over the iPod and what it is connected to is established thanks to the Apple Accessory Protocol, a driver style program developed by Apple.
The ends of the connector each feature thirty pins which are designed to carry a variety of data. For example, pins two through six carry left and right audio while pins nineteen and twenty are responsible for supplying power via a Firewire connection.
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