| 摘要 |
An electronic cross connect frame, for an exchange or a multiplexor thereof, comprises an analogue access matrix (12) having n inputs for subscriber lines and n + x outputs to a distribution frame, the matrix being capable of switching, on a one-one basis, up to 2x of the inputs to any of the outputs, and control means (16) associated with the matrix for switching an input to an output and for providing a limited number of spare cards or different cards to which any of the lines may be switched to provide a "sparing" or alternative services. |
