Computer Science | Grinnell College

Computer equipment utilizes a variety of protocols for transmitting data.

• A common Ethernet cable contains eight wires, follows a 10Base T protocol, and contains an RJ-45 jack at each end. This type of cable is commonly called a "twisted pair cable".
• A common computer connection utilizes 15 wires or pins and often includes metal shielding to reduce electrical interference. The connector arranges wires into two rows of 8 and 7 wires, called a DA-15 connector. DA-15 sockets are commonly found on the back of computers.

The CentreCom MX20T device provides an interface between an RJ-45 jack and a DA-15 connector. Each type of cable is plugged into the device, and the box translates one protocol to the other.