designed to support up to 4ing telephone lines with 8 outputs/extensions per line module is bridged as one expansion jack is used as input and the other one as expansion for more outputs/extensions by connecting to another icresvpb1c 8 port telephone resi module with expansion jacks fits all icresdc 14 , 21 , 26 and 42 resi distribution center enclosures with the 4 locking buttons installation instructions #mrs 0411 3 included ul listed patible with most major manufacturers enclosures
