User Guide

Grandstream Networks, Inc.  HT-502 User Manual  Page 20 of 32 
  Firmware Version 1.0.4.2 Last Updated: 06/2011 
Port Status 
Displays relevant information regarding the each FXS port. 
Port  Hook  Registration  DND  Forward 
Busy 
Forward 
Delayed 
Forward 
FXS1  On Hook  Registered 
Yes  613     
FXS2  On Hook  Registered 
No    614   
•  Both FXS port1 and FXS port2 are registered with this SIP Server. 
•  FXS Port 1 user has set Do Not Disturb. 
•  FXS Port 1 user has set his calls to be forwarded unconditionally to ext 613. 
•  FXS Port 2 user has set his calls to forward to 614 when his phone is busy. 
Advanced User Configuration 
Log in to the advanced user configuration page the same way as for the basic configuration page. The 
password is case sensitive and the factory default password for Advanced User is “admin”. 
Advanced User configuration includes the end user configuration and the advanced configurations 
including: a) SIP configuration, b) Codec selection, c) NAT Traversal Setting and d) other miscellaneous 
configuration. HT502 each FXS SIP account has its own configuration page. Their configurations are 
identical. 
T
ABLE 9: ADVANCED SETTINGS 
Admin Password 
This contains the password to access the Advanced Web Configuration page. This field is 
case sensitive. Only the administrator can configure the “Advanced Settings” page. 
Password field is purposely left blank for security reasons 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 12. 
Layer 2 QoS  Value used for layer 2 VLAN tag. Default setting is blank. 
STUN Serve
r
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. 










