Abstract: The equipment includes a recorder (17) provided with at least one memory disk unit (32) for recording messages and for deferred retransmission thereof. The equipment includes circuitry (18, 22) for putting a plurality of telephone sets into communication simultaneously with a single disk controller (33) of the recorder for transmitting messages simultaneously both from the telephone sets and from the disk unit. The invention is particularly suitable for private branch exchanges.

Abstract: Interface for transmit and receive mode access to the synchronous transmission medium of a distributed switching network. This interface for transmit and receive mode access to the synchronous transmission medium of a distributed switching system, the architecture of the network being based on a transmission medium time-shared between stations and each station comprising a device for determining the time positions corresponding to data to write to or to read from the medium, comprises in each station, for each transmission direction, a pair of memories one of which respectively accesses said medium in transmit mode and in receive mode synchronously with the presentation of the time positions to the medium while the other is respectively written or read under the control of the time position determining device, and vice versa.