Comprehensive IEEE1394a cables commonly referred to as inchFirewireinch cables provide high speed digital transmission of data video and audio between computers and consumer devices such as scanners printers DV camcorders external hard drives and more.IEEE 1394 firewire cables provide data speeds 100 200 or 400 Mbps (megabytes per second). Firewire cables commonly come in three pin configurations; 4 to 4 6 to 4 or 6 to 6. (There is also a 9 pin version used by Firewire 800 1394b cables.).