Cablesys ICC-ICRESVPB2C Deluxe Series Telephone Expansion 8 Port

-Designed to support up to 4 incoming telephone lines with 8 outputs/extensions per line, used with ICRESVPAxx 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 ICRESVPBxx 8-port telephone expansion resi module- Fit all ICRESDC 14?, 21?, 28?, and 42? Net Media Center