Toshiba DK40 Key Service Unit (Refurbished)The Strata DK40 is a compact configured 0x8 double cabinet, wall mount design, which provides many of the features offered by much larger systems. Key Features: Provides capacity of 4 CO lines, 8 digital stations and 4 single line stations in the base cabinet. With an expansion cabinet it has the maximum capacity of 12 CO lines and 28 stations. Base cabinet includes external page interface, MOH BGM interface, power failure transfer (1 line to 1