A specialized type of high-speed data channel switch. It differs from a normal voice switch, which switches transmission paths in response to dialing instructions. In a digital cross-connect system, you give it separate and specific instructions to connect this line to that. These instructions are given independently of any calls that might flow over the system. This contrasts with a normal voice switching in which 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. For example, you might want to change the T1 24-voice conversation circuit to Chicago at 11:00 a.m. each day to allow for the president's 30-minute video conference call.