The ODU-4/USB-A (2.0M) cable is a way of taking care of data transfers when using the GR-5 unit. It will handle a variety of data amounts measured in Optical Channel Data Units (ODU). It will allow for the transportation of 80 ODU0. Other signal options are 40 ODU1, 10 ODU2, and 2 ODU3. It can even transfer 100 Gb via an Ethernet signal.