Abstract: A packeting time of 6 ms is required for filling the information part of an ATM cell with 48 octets of a 64 kbit/s channel. This transit time is impermissably long for PCM voice connections. This situation is alleviated in that the information part of the ATM cells is subdivided into 24 fields of two octets each. Two respective data octets of a channel are then entered therein.

Abstract: A method for transmitting digital data in a time-division multiplex telecommunications network over subscriber lines connecting digital subscriber stations to a subscriber concentrator is described. Transfers of data occur over two wire subscriber lines in both transmission directions in a time interleaved manner alternatively and in the form of bits. The bits are formed to have a duration such that in conjunction with the distance/velocity lags of transmission over subscriber lines they almost completely use the sampling intervals or pluralities thereof. This forms the basis for transmisson over time division multiplex paths going out from the subscriber concentrator and coming in thereat, except for a tolerance time interval allowed for the period of the clock generators determining the bit rate in the subscriber sets relative to the period of the exchange clock generator determining the exchange clock rate in the exchange connected to the subscriber concentrator.