User's Manual
Grandstream Networks, Inc.  HT-702 User Manual  Page 29 of 32 
  Firmware Version 1.0.0.17  Last Updated: 02/2012 
SOFTWARE UPGRADE 
Software upgrade can be done via either TFTP or HTTP. The corresponding configuration settings are in 
the ADVANCED SETTINGS configuration page. 
Firmware Upgrade through TFTP/HTTP/HTTPS 
To upgrade via TFTP or HTTP/HTTPS, the “Firmware Upgrade and Provisioning upgrade via” field needs 
to be set to TFTP HTTP or HTTPS, respectively. “Firmware Server Path” needs to be set to a valid URL of 
a TFTP or HTTP server, server name can be in either FQDN or IP address format. Here are examples of 
some valid URL. 
e.g. firmware.mycompany.com:6688/Grandstream/1.0.0.17 
e.g. 72.172.83.110 
NOTES: 
y  Firmware upgrade server in IP address format can be configured via IVR. Please refer to the 
CONFIGURATION GUIDE section for instructions. If the server is in FQDN format, it must be set 
via the web configuration interface. 
y  Grandstream recommends end-user use the Grandstream HTTP server. Its address can be found 
at http://www.grandstream.com/support/firmware
 . Currently the HTTP firmware server IP address 
is 72.172.83.110. For large companies, we recommend to maintain their own TFTP/ HTTP/HTTPS 
server for upgrade and provisioning procedures. 
y  Once a “Firmware Server Path” is set, user needs to update the settings and reboot the device. If 
the configured firmware server is found and a new code image is available, the HT702 will attempt 
to retrieve the new image files by downloading them into the GXW400x ’s SRAM. During this stage, 
the HT702’s LEDs will blink until the checking/downloading process is completed. Upon verification 
of checksum, the new code image will then be saved into the Flash. If TFTP/HTTP/HTTPS fails for 
any reason (e.g. TFTP/HTTP/HTTPS server is not responding, there are no code image files 
available for upgrade, or checksum test fails, etc), the HT702 will stop the TFTP/HTTP/HTTPS 
process and simply boot using the existing code image in the flash. 
y  Firmware upgrade may take as long as 15 to 30 minutes over Internet, or just 5 minutes if it is 
performed on a LAN. It is recommended to conduct firmware upgrade in a controlled LAN 
environment if possible. For users who do not have a local firmware upgrade server, Grandstream 
provides a NAT-friendly TFTP server on the public Internet for firmware upgrade. 
y  Grandstream’s latest firmware is available at http://www.grandstream.com/support/firmware
 . 
Oversea users are strongly recommended to download the binary files and upgrade firmware 
locally in a controlled LAN environment. 
y  Alternatively, user can download a free TFTP or HTTP server and conduct local firmware upgrade. 
A free windows version TFTP server is available for download from 
http://support.solarwinds.net/updates/New-customerFree.cfm
. Our latest official release can be 
downloaded from http://www.grandstream.com/y-firmware.htm. 
Instructions for local firmware upgrade
: 
1.  Unzip the file and put all of them under the root directory of the TFTP server. 
2.  Put the PC running the TFTP server and the HT702 device in the same LAN segment. 










