AT820 Series User Manual
4
ATCOM TECHNOLOGY CO., LIMITED
www.atcom.cn
5.4.1 SIP ......................................................................................... 29
5.4.2 Codec Configuration .................................................................. 30
5.4.3 Call Feature Setting .................................................................. 31
5.4.4 Dial Plan .................................................................................. 32
5.5 Phone Setting ................................................................................... 34
5.5.1 Preference ............................................................................... 34
5.5.2 Line ........................................................................................ 36
5.5.3 Features .................................................................................. 36
5.5.4 Voice ...................................................................................... 38
5.5.5 Ring ........................................................................................ 39
5.5.6 Tone ....................................................................................... 39
5.6. Update ........................................................................................... 40
5.6.1 Manual Update ......................................................................... 40
5.6.2 Auto Provision .......................................................................... 41
5.6.3 Reset & Reboot ......................................................................... 42
5.7 Phone Book ...................................................................................... 42
5.8 Call Log ........................................................................................... 42
6. FAQ & Trouble Shooting ............................................................... 43
6.1. Frequently Asked Questions ............................................................... 43
6.1.1. How to make the factory reset ................................................... 43
6.1.2 Upgrade firmware under safe mode ............................................. 43
6.1.3 How to make direct IP call .......................................................... 44
6.2 Trouble Shooting ............................................................................... 44
6.2.1 The phone can’t register successfully ........................................... 44
6.2.2 The phone can’t obtain IP address ............................................... 44
6.2.3 Only one part can hear the voice during the call ............................ 45
