Network media converters are used to interconnect different types of cables within an existing network. They receive data from one type of cable and convert the signals for transmission along another cable type. Typically, network media converters are often used to connect newer Gigabit Ethernet (1000 Mbps) cabling to older 10Base-T or 100Base-T networks. Some network media converters are standalone devices that convert data between two different media types. Others are chassis-based models that connect many different media types in a single housing. Generally, these chassis-based devices are modular, stackable, and rack-mounted. They may also include an uplink or crossover switch to allow connections to either a workstation or a hub without the use of a cross-pinned cable. Network media converters with an integrated circuit (IC) or printed circuit board (PCB) form factor are also available. Full-duplex converters can be connected to network devices that transmit and receive signals at the same time.