Table 10: Advanced Settings - Grandstream Networks HT503 User Manual

miscellaneous configuration.
Admin Password
Layer 3 QoS
Layer 2 QoS
STUN Server
Keep-alive interval
Use STUN to detect
network activity
Firmware Upgrade
and Provisioning
Via TFTP

Table 10: Advanced settings

Administrator password. Only the administrator can configure the "Advanced
Settings" page. Password field is purposely blanked for security reason after
clicking update and saved. The maximum password length is 25 characters.
This field defines the layer 3 QoS parameter which can be the value used for
IP Precedence or Diff-Serv or MPLS. Default value is 48.
Layer 2 QoS settings. Default setting is blank. VLAN supported equipment is
required when configuring these settings.
IP address or Domain name of the STUN server.
This parameter specifies how often the HT503 sends a blank UDP packet to
the SIP server in order to keep the NAT "pin hole" open. Default is 20
seconds.
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.
Enables the HT503 to download firmware or configuration files through either
TFTP or HTTP servers. The default method is HTTP.
This is the IP address of the configured TFTP server. If this is configured, the
HT503 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,
HT503 User Manual
P a g e | 43