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.
Grandstream latest firmware is available 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.
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://www.solarwinds.com/register/?Program=52&c=70150000000CcH2.
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 GXW400X device in the same LAN segment.
3. TFTP server's security settings should be changed from "Receive Only" to "Transmit Only" for the
firmware upgrade.
4. Configure the Firmware Server Path with the IP address of the PC
5. Update the change and reboot the unit.
Configuration File Download
Grandstream SIP Device can be configured via Web Interface as well as via Configuration File through
TFTP or HTTP/HTTPS. “Config Server Path” is the TFTP or HTTP/HTTPS server path for configuration file.
It needs to be set to a valid URL, either in FQDN or IP address format. The “Config Server Path” can be
same or different from the “Firmware Server Path”.
A configuration parameter is associated with each particular field in the web configuration page. A
parameter consists of a Capital letter P and 2 to 3 (Could be extended to 4 in the future) digit numeric
numbers. i.e., P2 is associated with “Admin Password” in the ADVANCED SETTINGS page. For a
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