The invention concerns the connection of functional units. A trunking arrement is disclosed which permits the linking of minority units of the same type in several blocks of units, to other units allocated to that type and grouped in a single block of units. The minority connections from minority units of distinct types, are grouped into relaying links and relayed by said links to a wiring structure, which reassembles the connections pertaining to units of one and the same type in regrouping links. Application of the invention is in the field of telecommunications.
