Automatic repeat dialling circuit - has subscriber command digit to store or not store dialled number

摘要

In a central exchange control station (ZST) is provided a number storage unit (SP) in which one storage word sufficient for an n-digita dialling number is reserved for each subscriber- individual equipment set. To enable the subscriber to decide whether a particular call if not immediately successful should be stored for automatic repeat dialling the dial number receptor set (WAS) contains an additional digit position which can store a command signal from the subscriber, and which, on transfer to the central exchange, also loads the subscriber-owned storage line in the store (S). An alternative enters all the dialled numbers into the sbuscriber-owned storage position for repeat dialling and the subscriber has the option to cancel the storage. Or, by a prefix to the dial number the subscriber inhibits the writing of the call number from the number repeater (WAS) to the dial repeat storage unit (SP). In doing so, the last-but-one call would be abandoned as far as the aut. re-dialling function is concerned.