Abstract: An apparatus is disclosed for effecting a communication arrangement of a plurality of communication circuits between first connection loci of a first switch array and second connection loci of a second switch array. The apparatus comprises: (a) a first connection interface with the first switch array having first interconnection loci; (b) a second connection interface with the second switch array having second interconnection loci; (c) a plurality of communication paths at least equal in number to the plurality of communication circuits intermediate the first and second connection interfaces; (d) a first router connected with the first switch array and connection interface; and (e) a second router connected with the second switch array and connection interface. The first and second router interfaces cooperate to effect a plurality of routing connections among the first connection loci, the second connection loci and selected communication paths to establish the communication arrangement.