Grandstream Networks 200 Series Local RTP, Port, Use Random, Keep-alive, Interval, Use NAT IP

Local RTP	This parameter defines the local RTP-RTCP port pair the BudgeTone 200
port	will 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	This parameter, when set to Yes, will force random generation of both the
Port	local SIP and RTP ports. This is usually necessary when multiple
	BudgeTone 200s are behind the same NAT.
Keep-alive	This parameter specifies how often the BudgeTone 200 sends a blank UDP
interval	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.
Firmware	This radio button will enable BudgeTone 200 to download firmware or
Upgrade and	configuration file through either TFTP or HTTP.
provisioning
Via TFTP	This is the IP address of the configured TFTP server. If selected and it is
Server	non-zero or not blank, the BudgeTone 200 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.
	Note: Please do NOT interrupt the TFTP upgrade process (especially the
	power supply) as this will damage the device. Depending on the network
	environment this process can take up to 15 or 20 minutes.
Via HTTP	The URL for the HTTP server used for firmware upgrade and configuration
Server	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, BudgeTone 200 will only do HTTP
	download once at boot up.
Allow DHCP	DHCP Option 66 is used to identify a TFTP server when the 'sname' field in
Option 66 to	the DHCP header has been used for DHCP options. If you choose yes,
override	GXP2000 will use the TFTP server resolved from DHCP, instead of the one
server	you specified in the "TFTP Server" option above.

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