LRS LineShare Pro - Advanced Auto Voice/Data/Fax Switching System &ndash; The BEST Line Sharing Technology (fax switch) Eliminate the need and expense for extra dedicated telephone lines 1 Telephone Line 4 Device Ports (True 4-Port Switching) Provides automatic, semi-automatic, or distinctive ring telephone line sharing for up to four devices 35 Programmable Features - Applications include homes, home offices, small offices and large offices. Uses include Credit card authorization terminal, Call diverter, Security alarm and monitoring system, All-in-one printer-fax-scanner, Money order dispensing system, Energy management system, Paging Systems, Flow monitoring system, Fax/modem cards, Time and attendance system, Telephones (phone systems), Fluid storage system, Answering machine, Point-of-sale terminal, Fax machines, Remote diagnostic system or any other modem or phone connected device. Emergency Override Function and Incoming Call Priority Barge-In-Protection with busy signal and Port-To-Port Call Transfer and Intercom