Grandstream Networks HT503 User Manual

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HT503 User Manual
miscellaneous configuration.
Table 10: Advanced settings
Admin Password
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.
Layer 3 QoS
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
Layer 2 QoS settings. Default setting is blank. VLAN supported equipment is
required when configuring these settings.
STUN Server
IP address or Domain name of the STUN server.
Keep-alive interval
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 to detect
network activity
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 the HT503 to download firmware or configuration files through either
TFTP or HTTP servers. The default method is HTTP.
Via TFTP
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,

Grandstream Networks HT503 Specifications

General

Brand	Grandstream Networks
Model	HT503
Category	Telephone Accessories
Language	English