Leviton® three new telephone expansion board offerings are designed for use in Leviton® Structured Media® enclosures, including the multi-dwelling unit (MDU) enclosure and the series 140, 280 and 420 Structured Media® centers (SMC's) to support a variety of telephone distribution configurations. They quick snap into molded in brackets in Leviton® mud enclosure or can be attached to Leviton® pre-configured structured cabling panels, single plastic brackets or expansion plastic brackets for mounting in series 140, 280 and 420 Structured Media® centers.