Upgrade via Web GUI 
Open  a  web  browser  on  PC  and  enter  the IP  address  of the phone. Then, login  with  the  administrator 
username and password. Go to Maintenance->Upgrade and Provisioning page, enter the IP address or the 
FQDN  for  the  upgrade  server  in  "Firmware  Server  Path"  field  and  choose  to  upgrade  via  TFTP  or 
HTTP/HTTPS. Update the change by clicking the "Save and Apply" button. Then "Reboot" or power cycle 
the phone to update the new firmware. 
 
When upgrading starts, the screen will show upgrading progress. When done you will see the phone restart 
again. Please do not interrupt or power cycle the phone when the upgrading process is on. 
 
Firmware upgrading takes around 60 seconds in a controlled LAN or 5-10 minutes over the Internet. We 
recommend completing firmware upgrades in a controlled LAN environment whenever possible. 
No Local TFTP/HTTP Servers 
For users that would like to use remote upgrading without a local TFTP/HTTP server, Grandstream offers 
a NAT-friendly HTTP server. This enables users to download the latest software upgrades for their phone 
via this server. Please refer to the webpage:   
http://www.grandstream.com/support/firmware 
 
Alternatively, users can download a free TFTP or HTTP server and conduct a local firmware upgrade. A 
free window version TFTP server is available for download from: 
http://www.solarwinds.com/products/freetools/free_tftp_server.aspx 
http://tftpd32.jounin.net/.   
 
Instructions for local firmware upgrade via TFTP: 
1.  Unzip the firmware files and put all of them in the root directory of the TFTP server; 
2.  Connect the PC running the TFTP server and the phone to the same LAN segment; 
3.  Launch the TFTP server and go to the File menu->Configure->Security to change the TFTP server's 
default setting from "Receive Only" to "Transmit Only" for the firmware upgrade; 
4.  Start the TFTP server and configure the TFTP server in the phone’s web configuration interface; 
5.  Configure the Firmware Server Path to the IP address of the PC; 
6.  Update the changes and reboot the phone. 
 
End users can also choose to download a free HTTP server from http://httpd.apache.org/ or use 
Microsoft IIS web server. 
Configuration File Download 
Grandstream SIP Devices can be configured via the Web Interface as well as via a Configuration File 
(binary or XML) through TFTP or HTTP/HTTPS. The "Config Server Path" is the TFTP or HTTP/HTTPS 
server path for the configuration file. It needs to be set to a valid URL, either in FQDN or IP address format. 
The "Config Server Path" can be the same or different from the "Firmware Server Path".