Grandstream Networks GXP-2000 - Manual (Page 35)

GXP-2000 User Manual
Grandstream Networks, Inc.
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NAT Traversal This parameter defines whether the GXP-2000 NAT traversal
mechanism will be activated or not. If activated (by choosing “Yes”)
and a STUN server is also specified, then the GXP-2000 will behave
according to the STUN client specification. Under this mode, the
embedded STUN client inside the GXP-2000 will attempt to detect if
and what type of firewall/NAT it is sitting behind through
communication with the specified STUN server. If the detected NAT
is a Full Cone, Restricted Cone, or a Port-Restricted Cone, the GXP-
2000 will attempt to use its mapped public IP address and port in all
its SIP and SDP messages. If the NAT Traversal field is set to “Yes”
with no specified STUN server, the GXP-2000 will periodically
(every 20 seconds or so) send a blank UDP packet (with no payload
data) to the SIP server to keep the “hole” on the NAT open.
Keep-alive
interval This parameter specifies how often the GXP-2000 sends a blank UDP
packet to the SIP server in order to keep the “hole” on the NAT open.
Use NAT IP: NAT IP address used in SIP/SDP message. Default is blank.
Proxy-Require SIP Extension to notify SIP server that the unit is behind the
NAT/Firewall.
Firmware
Upgrade This radio button will enable GXP-2000 to download firmware or
configuration file through either TFTP or HTTP.
Via TFTP Server This is the IP address of the configured TFTP server. If it is non-zero
or not blank, the GXP-2000 will attempt to retrieve new configuration
file or new code image from the specified TFTP server at boot time. It
will make up to 3 attempts before timeout and then it 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, the new
downloaded image will be verified and then saved into the Flash
memory.
Via HTTP
Server The URL for the HTTP server used for firmware upgrade and
configuration via HTTP. For example,
http://provisioning.mycompany.com:6688/Grandstream/1.0.5.16
Here “:6688” is the specific TCP port that the HTTP server is
listening at, it can be omitted if using default port 80.
Note: If Auto Upgrade is set to No, GXP-2000 will only do HTTP
download at boot up.