6 © SAMSUNG Electronics Co., Ltd.BASIC FUNCTIONS 21Making Calls.....................................................21Making Internal Calls...................................................... 21Making External Calls..................................................... 22Making Calls Via Speakerphone..................................... 23Making External Calls Again........................................... 24Redialing C.O. Line Number........................................... 24Saving C.O. Line Number .............................................. 25Redialing C.O. Line Number Saved ............................... 25Dialing Recent Number .................................................. 26Answering Calls................................................27Using Handset................................................................ 27Using Speakerphone ...................................................... 28Page Pickup ................................................................... 29Usable Functions While Calling ..........................30Call Hold......................................................................... 30Call Waiting .................................................................... 31Mute ............................................................................... 32Call Transfer ................................................................... 33NAVIGATION MENU 34Navigation Button.............................................34Navigation Menu ..............................................35TROUBLESHOOTING 39ANNEX 41Specification ....................................................41