Abstract: A circuit board assembly for use in a communication system switch includes a motherboard that comprises a planar, substantially rigid, and substantially dielectric circuit, a back plane connector affixed to the circuit board and a pair of daughter board connectors affixed to the circuit board, each of which is for coplanerly coupling with a daughter board. Each daughter board includes rigid dielectric circuit board, a plurality of integrated circuit components disposed thereon, at least one media coupler affixed to the circuit board and a motherboard connector affixed to the circuit board for coplanerly coupling with the motherboard. Finally, a pair of guides affixed to the circuit board for removably engaging a pair of daughter board slot assemblies of the motherboard to mate the daughter board with the motherboard.