How To Make Direct Ip Call; Trouble Shooting; The Phone Can't Register Successfully; The Phone Can't Obtain Ip Address - ATCOM AT820 User Manual

AT820 Series User Manual
5. The phone will download the firmware from the TFTP server;
6. After the download is done, the phone will upgrade automatically;
7. After the update is finished, the phone will start up with the configuration of
factory reset.

6.1.3 How to make direct IP call

The way to make direct IP call is similar to digit call, steps are:
1. After hooking off, press right navigation key and press the third soft key "Num" to
switch to "IP".
2. Using * key to inputting ".". If user wants to dial 192.168.1.100, then press
192*168*1*100.
3. After inputting the IP address, press dial key to dial it out.

6.2 Trouble Shooting

6.2.1 The phone can't register successfully

A. Check the IP address, and if the mode of WAN port is DHCP, please make sure the
DHCP server is in service.
B. Check the gateway.
C. Check the DNS.
D. Make sure the information of the account is consistent with which offered by the
service supplier.
E. Make sure the SIP server is on.
F. Check the port of the SIP server whose default value is 5060.

6.2.2 The phone can't obtain IP address

A. Make sure the cable has been connected to the WAN port of the phone.
B. Make sure the cable and the switch's port that connected with the cable is
available.
C. Make sure the DHCP server is on and there are some assignable IP addresses in
the address pool.
D. Try to change the LAN port mode as Static.
ATCOM TECHNOLOGY CO., LIMITED www.atcom.cn
44