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Grandstream Networks, Inc. GXP–2020 Users Manual Page 26 of 33
Firmware 1.1.4.3 Last Updated: 05/2007
Local RTP port
This parameter defines the local RTP-RTCP port pair used to listen and transmit. It is the
base RTP port for channel 0. When configured, channel 0 will use this port _value for
RTP and the port_value+1 for its RTCP; channel 1 will use port_value+2 for RTP and
port_value+3 for its RTCP. The default value is 5004.
Use Random
Port
This parameter, when set to “Yes”, will force random generation of both the local SIP
and RTP ports. This is usually necessary when multiple GXP-2020s are behind the
same NAT. Default is No.
Keep-alive
interval
This parameter specifies how often the GXP-2020 sends a blank UDP packet to the SIP
server in order to keep the “hole” on the NAT open. Default is 20 seconds.
Use NAT IP
NAT IP address used in SIP/SDP message. Default is blank.
STUN Server
IP address or Domain name of the STUN server. STUN resolution result will display in
the STATUS page of the Web UI.
Firmware
Upgrade
This radio button will enable GXP-2020 to download firmware or configuration file
through either HTTP or local TFTP server. Choices are mutually exclusive.
Via TFTP Server
This is the IP address of the configured TFTP server. If selected and it is non-zero or not
blank, the GXP-2020 will attempt to retrieve a 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.
Note: Grandstream strongly recommends that the user upgrade firmware locally in a
LAN environment if using TFTP to upgrade. Please do NOT interrupt the TFTP upgrade
process (especially the power supply) as this will damage the device.
Via HTTP
Server
The HTTP server URL used for firmware upgrade and configuration via HTTP. For
example: http://provisioning.mycompany.com:6688/Grandstream/1.1.4.3.
Here “:6688” is the specific TCP port that the HTTP server is using; omit if using default
port 80.
Note: If Auto Upgrade is set to No, GXP-2020 will only perform HTTP download once at
boot up.
Automatic
Upgrade
This function is used by ITSP. End user should NOT touch these parameters.
Default is No. Choose “Yes” to enable automatic HTTP upgrade and provisioning.
In “Check for upgrade every” field, enter the number of minutes to check the HTTP
server for firmware upgrade or configuration changes. When set to “No”, the phone will
only perform HTTP upgrade and configuration check once at boot up.
Phonebook
XML
Enable the XML phonebook via TFTP or HTTP. Define XML server path and download
speed.
Idle Screen XML
Enable XML Idle Screen via TFTP or HTTP. Define XML server path.
DTMF Payload
Type
This parameter sets the payload type for DTMF using RFC2833. Default is 101.
Syslog Server
The IP address or URL of System log server. This feature is especially useful for ITSPs.