Grandstream Networks BT200 user manual SIP Registration Unregister on Reboot, Register Expiration

SIP Registration

Unregister on Reboot

This parameter controls whether the BT200 needs to send REGISTER messages to the proxy server. The default setting is “Yes”.

Default is No. If set to yes, the SIP user’s registration information will be cleared on reboot.

Register Expiration

This parameter allows user to specify the time frequency (in minutes) that BT200 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:

Proxy-Require

Voice Mail User ID

Send DTMF

Early Dial

Dial Plan Prefix

Enable Call Features

Disable Missed-Call

This parameter defines the local SIP port the BT200 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 BT200 NAT traversal mechanism will be activated or not. If activated (by choosing “Yes”) and a STUN server is also specified, then the BT200 will behave according to the STUN client specification. Under this mode, the embedded STUN client inside the BT200 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 BT200 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 BT200 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.

SIP Extension to notify SIP server that the unit is behind the NAT/Firewall.

When configured, user will be able to dial voice mail server by pressing “MSG” button.

This parameter specifies the mechanism to transmit DTMF digit. There are 3 modes supported: in audio which means DTMF is combined in audio signal (not very reliable with low-bit-rate codec), via RTP (RFC2833), or via SIP INFO.

Default is No. Use only if proxy supports 484 response.

Sets the prefix added to each dialed number.

Default is No. If set to Yes, Call transfer, Call Forwarding & Do-Not-Disturb are supported locally.

Default is No. If set to Yes, missed calls will not be recorded for your review.

Grandstream Networks, Inc.	BT200 User Manual	Page 27 of 37
	Firmware 1.1.1.14	Last Updated: 12/2006