ICRESVPB3C - International Connectors And Cable Corp. Compact Module Telephone Expansion

8 Port Telephone Expansion Module Designed to support up to 4 incoming telephone lines with 8 outputs/extensions per line, used with ICRESVPA3C 8-port telephone compact module with RJ31X jack 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 ICRESVPB3C 8-port telephone residential module with expansion jacks Fits all ICRESDC 14", 21", 28", and 42" residential distribution center enclosures with the 4 locking buttons Modules compatible with most major manufacturer's enclosures UL listed