Nokia Corporation

Nokia Networks Oy

Esa Torma

Harri Lahti

The invention relates to a multiplexing method used in a PDH network. Standard PCM signals are received in the network element, at least some of which are multiplexed on a time-division basis into the same outbound transmission frame, the capacity of the payload portion of the frame substantially corresponding to the capacity required by N PCM signals. In order that ATM cells may be transferred more advantageously than heretofore through an existing PDH network, the multiplexing is implemented as configurable in such a way that the total capacity of the payload portion cab be divided between at least two parts of variable capacity in such a way that each part can be allocated a desired portion of the total capacity of the payload portion in accordance with the current transmission requirement. A part of the payload depending on the desired capacity is allocated to at least one traffic source from a group in which a number of PCM signals constitutes a first traffic source and a number of packet data streams constitutes a second traffic source. The invention is specifically intended for transferring ATM traffic through a PDH network.

Multiplexing in a PDH telecommunications network

This invention relates to a cross connection element which comprises at least one input, output and branching means for forwarding through predetermined outputs at least some signal components of a first serial data signal received through the input. To provide such a cross connection element that considerably facilitates the management of the data transmission network, the branching means comprise means for transparently forwarding single signal components of a serial data signal received through said input, as serial data signals through the output indicated by the routing data stored in the memory means of the cross connection element. In addition, the cross connection element comprises at least one output for transparently forwarding a single signal component of a first serial data signal indicated by the routing data stored in the memory means.

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Helsinki, Finland

Esa Torma