Leviton's three new Telephone Expansion Board offerings are designed for use in Leviton's 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's MDU 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. 1 x 6 Bridged Telephone Expansion Board (4 lines to 6 locations). Connect up to six separate telephones per line Bridge up to 4 telephone lines to 6 locations Fits easily into Leviton Structured Media Panels