-Designed to support up to 4 incoming telephone lines with 8 outputs/extensions per line-Module is bridged as using only 2 incoming lines can get 16 outputs/extensions per line and using only 1 incoming line can get 32 outputs/extensions-Includes an RJ31 jack connected to line 1 for a security system-Includes an expansion jack for more outputs/extensions by connecting to ICRESVPBxx 8-port telephone expansion resi module-Fit all ICRESDC 14 21 28 and 42 Net Media Center
