The Codec is a ship within cyberspace that was created by Adam Carter as part of hia guardian tech. It served as transport for Vera and then the four new guardians within cyberspace. The ship was also equipped with weapons.
It is also used to view what is happening from the User world.
It was ultimately destroyed when Adam Carter piloted the ship into the cyber blackhole that his alter ego, the sorcerer created.
Two of the main rooms seen were the transfer pod, which is where the New guardian team appear when digitised, and the control module, whish is located near the front of the ship and acts as a bridge.