The R-12 accomodates 12 Core Tec Modules on the rear side of the unit. Redundant power supply optional (see R-12-DPS). Includes an On/Off power switch on rear of unit and Cover Plates for empty slots available. The R-12 combines MPEG2, MPEG4, H.264, H.264/MPEG2/4/J Encoders and/or H.264, MPEG2, MPEG4, H.264/MPEG2/4 Decoders in the same chassis.