A digital cross connect (also known as cross connect) is a specialized type of high-speed circuit connection scheme for transporting DS0, DS1 and other aggregates of data and voice traffic from any given port "x" to any given port "y", simplfying adds, moves and changes required to interconnect communications equipment. It differs from a normal voice switch, which switches transmission paths in response to dialing instructions. In a digital cross connect system, separate and specific instructions are given to connect one line to another. These instructions are independent of any calls that flow over the system. In normal voice switching, switching instructions and conversations go together. Commands to a digital cross connect system can be given by an operator at a console or can be programmed to switch at certain times.
RAD’s Digital Cross Connect Solutions
RAD’s DXC cross connect devices enable fast rollout of services with minimal infrastructure outlay. The DXC cross connect devices are the most compact and high-density systems of their kind, supporting a full range of services such as high-speed data, LAN connectivity and voice streaming. Deployed at the customer premises, in the Local Loop or at the carrier’s points of presence (POP), these products support Last Mile solutions such as IDSL, HDSL, SHDSL, and fiber optics. DXC products also feature carrier-class protection and redundancy.
DXC cross connect products provide non-blocking DSO cross connect for up to 688 lines. Plug-in interface modules can accommodate links that support n x 56/65 kbps, ISDN, E1/T1, SHDSL, fully populated or fractional E3/T3, fully populated or fractional STM-1/OC-3, and inverse multiplexing services. Using RAD’s digital cross connects products allow maximum flexibility between ports via a programmable connection table that connects any incoming 56/64 kbps timeslot to any outgoing one. They also support cross connect functions like drop-and-insert, distribute and collect.
DXC cross connect devices enable grooming of fractional user-side traffic into full E1/T1, E3/T3 or STM-1/OC-3 trunks. They can broadcast any traffic combination from a single input to numerous destinations, and they support channel relocating and half duplex conferencing.
Digital cross connect solutions are also available for mobile applications – for example, the DXC-8R is used for TDM aggregation in 2G cellular environments.