Line Jacks ADSL Line Jack LJU 2/1A PSTNSingle Outlet Surface Mount LJU 2/2A PABX Single Outlet Surface Mount LJU 2/3A Secondary Single Outlet Surface Mount LJU 3/1A PSTN Single Outlet Flush Mount LJU 3/2A PABX Single Outlet Flush Mount LJU 3/3A Secondary Single Outlet Flush Mount LJU 4/1A PSTN Double Outlet Flush Mount LJU 4/2A PAX Double Outlet Flush Mount LJU 4/3A Secondary Double Outlet Flush Mount