Grandstream Networks HT502 - Manual (Page 20)

Grandstream Networks, Inc. HT-502 User Manual Page 20 of 31
Firmware Version 1.0.1.21 Last Updated: 12/2008
Layer 2 QoS Value used for layer 2 VLAN tag. Default setting is blank.
STUN Server IP address or Domain name of the STUN server.
Keep-alive interval This parameter specifies how often the HT502 sends a blank UDP packet to the SIP
server in order to keep the “hole” on the NAT open. Default is 20 seconds. Minimum
value is 20 seconds.
Use STUN to detect
network connectivity Use STUN keep-alive to detect WAN side network problems. If keep-alive request does
not yield any response for configured number of times, the device will restart the TCP/IP
stack. If the STUN server does not respond when the device boots up, the feature is
disabled.
Firmware Upgrade
and Provisioning Enables HT502 to download firmware or configuration file through either the TFTP, HTTP
or HTTPS server.
Via TFTP Server This is the IP address of the configured TFTP server. If selected and it is non-zero or not
blank, the HT502 retrieves the new configuration file or new code image from the
specified TFTP server at boot time. After 5 attempts, the system will timeout and will start
the boot process using the existing code image in the Flash memory. If a TFTP server is
configured and a new code image is retrieved, the new downloaded image is saved into
the Flash memory.
Note: Please do NOT interrupt the TFTP upgrade process (especially the power supply)
as this will damage the device. Depending on the local network, this process can take up
to 15 or 20 minutes.
Via HTTP / HTTPS
Server The URL for the HTTP/HTTPS server used for firmware upgrade and configuration via
HTTP.
For example, http://provisioning.mycompany.com:6688/Grandstream/1.0.0.67“:6688” is
the specific TCP port where the HTTP or HTTPS server is listening; it can be omitted if
using default port 80.
Note: If Auto Upgrade is set to No, HT502 will only do HTTP/HTTPS download once at
boot up.
Firmware Server Path IP address or domain name of firmware server.
Config Server Path IP address or domain name of configuration server.
Firmware File Prefix Default is blank. If configured, HT502 will request firmware file with the prefix. This
setting is useful for ITSPs. End user should keep it blank.
Firmware File Postfix Default is blank. End user should keep it blank.
Config File Prefix Default is blank. End user should keep it blank.
Config File Postfix Default is blank. End user should keep it blank.
Allow DHCP Option 66
to override server If set to “Yes”, configuration and upgrade server information can be obtained using DHCP
option 66 from DHCP server located in customer’s environment.
Automatic Upgrade Choose “Yes” to enable automatic upgrade and provisioning. If select “Check every
minutes” input the amount of minutes you want it to check for update. If select “Yes, daily
at hour” make sure to input the hour of the day you want it to check for update, e.g. for 11
pm type 23. If select “Yes, weekly on day” make sure you input the day of the week (in
format 0-6, 0 is Sunday) you want it to check for update. When set to No, HT502 will only
do the following option you select; “Always check for New Firmware at Boot up” will check
for new firmware every time the device reboots. “Check New Firmware only when F/W
pre/suffix changes” will check for updates only when the pre/suffix has been changed.