Channel occupancy in a service integrated switching network

For examination of the channel occupancy of the transmission channels a model of a service integrated switching network is introduced in which the information of two services with different bitrates is transmitted in a time division multiplex mode within one common network. The occupancy of the transmission channels that can be achieved is compared for different access modes in the common multiplex frame. Depending on the number of channels of the transmission media and of the bitrate ratio of the services a limit can be determined from which a common transmission with unlimited access of all service demands to all channels cannot be justified by a higher occupancy of the transmission channels. Whether a common transmission for services of different bitrate in separated subframes of a multiplex frame within a wideband transmission media represents an economic alternative compared with separate networks must therefore mainly be determined by other important considerations.