Grandstream Networks GXP1100/1105 manual Firmware version Last Updated 07/2011

NAT Traversal

SUBSCRIBE for MWI:

SUBSCRIBE for

Registration

PUBLISH for Presence

Proxy-Require

Voice Mail UserID

Send DTMF

DTMF Payload Type

Early Dial

Dial Plan Prefix

This parameter activates the NAT traversal mechanism. It has options: No, STUN, Keep-Alive, UPnP, Auto, VPN.

If selecting STUN and a STUN server is also specified, the phone performs according to the STUN client specification. Using this mode, the embedded STUN client detects if and what type of NAT/Firewall configuration is used. If the detected NAT is a Full Cone, Restricted Cone, or a Port-Restricted Cone, the phone will use its mapped public IP address and port in all of its SIP and SDP messages.

If selecting Keep-Alive with no specified STUN server, the GXP1100/1105 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.

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

Enable Presence feature.

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

When configured, user can access messages by pressing “MSG” button. This ID is usually the VM portal access number.

This parameter specifies the mechanism to transmit DTMF digit. There are 3 supported modes: 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.

Sends DTMF using RFC2833. The default is 101.

Default is “No”. Use only if proxy supports 484 responses.

Sets the prefix added to each dialed number.

Grandstream Networks, Inc.	GXP1100/1105 User Manual	Page 22 of 29
	Firmware version: 1.0.1.80	Last Updated: 07/2011