User manual

AT800 Series User Manual
ATCOM TECHNOLOGY CO., LIMITED www.atcom.cn
Phone book.......................................................................................................................................... 41
Call log ................................................................................................................................................. 41
FAQ .............................................................................................................................................................. 42
How to restore to factory settings ....................................................................................................... 42
Upgrading in the safe mode ................................................................................................................ 42
How to make direct IP calls ................................................................................................................. 42
How to connect headset ...................................................................................................................... 42
Trouble shooting .......................................................................................................................................... 43
Phone cant register to the SIP server.................................................................................................. 43
Device cant obtain IP address ............................................................................................................. 43
Conversation with one way speech ..................................................................................................... 43