Grandstream HT503 User Manual - Manual (Page 38)

FIRMWARE VERSION 1.0.14.1 HT503 USER MANUAL Page 36 of 64
FIGURE 3: UPLINK/DOWNLINK BANDWIDTH LIMITATION
Advanced User configuration includes not only the end user configuration, but also advanced
configurations such as: SIP configuration, Codec selection, NAT Traversal Setting and other
miscellaneous configuration.
TABLE 9: 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 feat
ure 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.