The invention relates to a system and method for the transmission of data organized
as cells comprising a header and a payload. In particular, the following steps
are taken in the system and method; reducing of the size of at least certain of
the headers; for transmission between two communications devices of a network,
to form headers that are reduced in size by the elimination of predetermined data
elements; and at one of the communications devices, reconstructing the headers
to their original size from the reduced headers.