Upgrade Firmware Under Safe Mode; How To Make Direct Ip Call; Rouble Shooting; The Phone Can't Register Successfully - ATCOM AT840 User Manual

AT840 Series User Manual
B. Factory reset through web, please refer to

1.2 Upgrade firmware under safe mode

If the phone could not start up normally, upgrade firmware under safe mode. Steps are:
1. Build a TFTP server and set its IP address as 192.168.1.200;
2. Copy the firmware to the root directory of the TFTP server and modify the file name as
AT840.FW;
3. Make sure the TFTP server and the phone are contacting with the same switch and
reachable to each other;
4. Long hold "#" key and start up the phone until the LCD display "Upgrading...";
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.

1.3 How to make direct IP call

When hook off/ pressing speaker or headset key,
1. Press right negative key and press the third softkey "number" twice 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.
2) Trouble Shooting

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.

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 WAN port mode as Static.

2.3 Only one part can hear the voice during the call

A. Make an IP dial-up call to make sure the telephone receiver and Mic are normal.
B. Enable STUN on web page.
C. Set STUN server as stun.3cx.com.
D. Click on "submit" and wait for the phone to restart.
E. Try to make calls again.
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