| 摘要 |
An electronic switching system using digital sampling and time division multiplexing to provide virtual connections between a plurality of external circuits. Each external circuit is connected to the matrix switch via respective line interface units (220, 320, 420). The conditioned external circuit signals are sampled by switch modules (210, 310, 410) and the time sampled information is exchanged between switch modules (210, 310, 410) via two switch buses (101, 102) under the control of a timing and control unit (110). Information transferred between switch modules (210, 310, 410) is synchronised to a cyclic time interval count generated by the timing and control module (110) and present on a control bus (100). Information transfers between external circuits are transparent to the switching system and its control unit. |
