Grandstream Networks DUAL ETHERNET PORT BT200 - Manual (Page 27)

Grandstream Networks, Inc. BT200 User Manual Page 27 of 37
Firmware 1.1.1.14 Last Updated: 12/2006
SIP Registration This parameter controls whether the BT200 needs to send REGISTER messages
to the proxy server. The default setting is “Yes”.
Unregister on Reboot 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 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.
SIP T1 Timeout 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.
SIP T2 Interval 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.
NAT Traversal 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.
Subscribe for MWI: Default is No. When set to “Yes” a SUBSCRIBE for Message Waiting Indication will
be sent periodically.
Proxy-Require SIP Extension to notify SIP server that the unit is behind the NAT/Firewall.
Voice Mail User ID When configured, user will be able to dial voice mail server by pressing “MSG”
button.
Send DTMF 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.
Early Dial Default is No. Use only if proxy supports 484 response.
Dial Plan Prefix Sets the prefix added to each dialed number.
Enable Call Features Default is No. If set to Yes, Call transfer, Call Forwarding & Do-Not-Disturb are
supported locally.
Disable Missed-Call Default is No. If set to Yes, missed calls will not be recorded for your review.