This Deluxe Ge Four-line Business Speakerphone With Intercom Is Perfect For The Busy Office. This Feature-packed Phone Can Handle Up To 34 Separate Telephone Lines And A Maximum Of 16 Stations. Three Parties Can Be Involved In A ConverSation At The Same Time. An Auxiliary Jack Allows Connection To A Fax, Modem Or Answerer And Can Be Connected To Line 1, 2, 3 Or 4. An Electronic Hold System Works On All Four Lines And Releases Automatically From Any Extension. Other Features Include Ringer Volume Control, And Separate Line-in-use Indicators. This Model Is Fcc Registered And Ul Listed.