Network switching unit for telephone lines, partic. for packet communications - has man-machine interface to clock programmable controller with memory with automatic dial to switching network

摘要

The automatic programmable control unit (3) is driven by a clock (6) using a protocol registered in a memory (4), and task sequences in a second memory (5). The interface can be a man-machine interface (2), a radio receiver (1) or a communications interface (2). The tasks are executed by an automatic dialler (7), which switches the telephone channel (8) in use at that time. The system is particularly suited to producing a three-way call and reversing charges automatically. ADVANTAGE - Less complex, with more reliable access.