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Grandstream Networks, Inc. HT-502 User Manual Page 20 of 35
Firmware 1.0.0.39 Last Updated: 03/2007
Self Defined Time
Zone
The syntax is std offset dst [offset],start[/time],end[/time]
Default is set to : MTZ+6MDT+5,M3.2.0,M11.1.0
MTZ+6MDT+5,
It indicates a time zone with 6 hours offset with 1 hour ahead which is the US
central time.
It is positive (+) if the local time zone is west of the Prime Meridian and negative
(-) if it is east.
Prime Meridian (a.k.a: International or Greenwich Meridian)
M3.2.0,M11.1.0
The 1
st
number indicates Month: 1,2,3,..,12 (for Jan, Feb, .., Dec)
The 2
nd
number indicates the n
th
iteration of the weekday: (1st Sunday, 3rd
Tuesday etc)
The 3
rd
number indicates Weekday: 0,1, 2, ..,6(for Sun, Mon, Tue, .., Sat)
Therefore, this example is the DST which starts from the second Sunday of
March to the 1st Sunday of November.
Language
Languages supported with voice prompt
Device Mode
This parameter controls whether the device is working in NAT router mode or
Bridge mode. Save the setting and reboot prior to configuring HT–502.
Enable UPnP
support
If set to “Yes”, the HT-502 would act as an UPnP gateway for your UPnP enable
applications.
UPnP - Universal Plug n Play
Repl
y
to ICMP on
WAN port
If set to “Yes”, the HT–502 will respond to the PING command from other
computers, but it also is vulnerable to the DOS attack. Default is No.
WAN side
HTTP/Telnet
Access
If set to “Yes”, user can access the configuration page through the WAN port,
instead of through the “PC” port. Warning: this configuration is less secure than
default option. Default is No.
Cloned WAN MAC
Addr
This allows you to change/set the MAC address on the WAN interface.
LAN Subnet Mask
Sets the LAN subnet mask. Default value is 255.255.255.0
LAN DHCP Base IP
Base IP for the LAN port which functions as a Gateway for the subnet.
Default value is 192.168.2.1.
DHCP IP Lease
Time
Value is set in units of hours. Default value is 120 hrs (5 Days.) The time IP
address is assigned to the LAN clients.
DMZ IP
Forward all WAN IP traffic to a specific IP address if no matching port is used by
HT–502 or defined in port forwarding.
Port Forwarding
Forwards a matching (TCP/UDP) port to a specific LAN IP address with a
specific (TCP/UDP) port.
In addition to the Basic Settings configuration page, end users also have access to the Device Status page.