Uniden UPBX 416 - Manual (Page 10)

Connecting Power
Simply connect the AC Adapter cord into the Power socket on the back of the unit and
connect the other end into your standard 240V AC electrical outlet.
Connecting Telephone Lines
Connect telephone line cords into line sockets on the back of the unit and connect the
other end of the telephone line cord into the wall jack.
Connecting Telephone Lines to Extensions
Connect telephone line cords into extension sockets on the back of the unit and
connect the other end of the telephone line cord into extension telephones, PC or
answering machine.
Power In Ext 200 - Ext 215 Line 1 - Line 4
RS232C
Audio In
5