Grandstream Networks 200 Use DNS SRV, User ID is Phone, Number, SIP Registration, Unregister on

Use DNS SRV:	Default is No. If set to Yes the client will use DNS SRV to look up
	server.
User ID is Phone	If the BudgeTone 200 has an assigned PSTN telephone number, this
Number	field should be set to “Yes”. Otherwise, set it to “No”. If “Yes” is set, a
	“user=phone” parameter will be attached to the “From” header in SIP
	request
SIP Registration	This parameter controls whether the BudgeTone 200 needs to send
	REGISTER messages to the proxy server. The default setting is “Yes”.
Unregister on	Default is No. If set to yes, the SIP user’s registration information will
Reboot	be cleared on reboot.
Register Expiration	This parameter allows user to specify the time frequency (in minutes)
	that BudgeTone 200 refreshes its registration with the specified
	registrar. The default interval is 60 minutes (or 1 hour). The maximum
	interval is 65535 minutes (about 45 days).

Local SIP port

SIP T1 Timeout

SIP T2 Interval

NAT Traversal

Subscribe for MWI:

This parameter defines the local SIP port the BudgeTone 200 will listen and transmit. The default value for Account 1 is 5060. It is 5062, 5064, 5066 for Account 2, Account 3 and Account 4 respectively.

T1 is an estimate of the round-trip time (RTT) between the client and server transactions. If the network latency is high, select bigger value for reliable usage.

This element sets the value of the SIP protocol T2 timer, in seconds. Timer T2 defines the retransmit interval for INVITE responses and non- INVITE requests. The SIP protocol default value is 4 seconds.

This parameter defines whether the BudgeTone 200 NAT traversal mechanism will be activated or not. If activated (by choosing “Yes”) and a STUN server is also specified, then the BudgeTone 200 will behave according to the STUN client specification. Under this mode, the embedded STUN client inside the BudgeTone 200 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 BudgeTone 200 will attempt to use its mapped public IP address and port in all of its SIP and SDP messages. If the NAT Traversal field is set to “Yes” with no specified STUN server, the BudgeTone 200 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.

Default is No. When set to “Yes” a SUBSCRIBE for Message Waiting Indication will be sent periodically.

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