Grandstream Networks GXP-1200 Subscribe for MWI, Publish for Presence, Proxy-Require, Send Dtmf

Subscribe for MWI:	Default is No. When set to “Yes” a SUBSCRIBE for Message Waiting Indication
	will be sent periodically.
PUBLISH for Presence	Enable Presence feature.
Proxy-Require	SIP Extension to notify SIP server that the unit is behind the NAT/Firewall.
Voice Mail UserID	When configured, user can access messages by pressing “MSG” button. This ID
	is usually the VM portal access number.
Send DTMF	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.
Early Dial	Default is No. Use only if proxy supports 484 response.
Dial Plan Prefix	Sets the prefix added to each dialed number.
Delayed Call Forward	Time waited before the call is forward to a number or VM.
Wait Time	Default is 20 seconds.
Enable Call Features	Default is Yes. If set to “Yes”, all star code call features will be supported locally.
Call Log	User can choose to disable Call Log and what kind of calls to log.
Session Expiration	The SIP Session Timer extension enables SIP sessions to be periodically
	“refreshed” via a SIP request (UPDATE, or re-INVITE. Once the session interval
	expires, if there is no refresh via a UPDATE or re-INVITE message, the session is
	terminated.
	Session Expiration is the time (in seconds) at which the session is considered
	timed out, provided no successful session refresh transaction occurs beforehand.
	The default value is 180 seconds.
	Defines the minimum session expiration (in seconds). Default is 90 seconds.
Min-SE
Caller Request Timer	If set to “Yes”, the phone will use session timer when it makes outbound calls if
	remote party supports session timer.
Callee Request Timer	If selecting “Yes”, the phone will use session timer when it receives inbound calls
	with session timer request.
Force Timer	If set to “Yes”, the phone will use session timer even if the remote party does not
	support this feature. If set to “No”, the session timer is enabled only when the
	remote party supports this feature. To turn off Session Timer, select “No” for
	Caller Request Timer, Callee Request Timer, and Force Timer.
UAC Specify Refresher	As a Caller, select UAC to use the phone as the refresher, or UAS to use the
	Callee or proxy server as the refresher.
UAS Specify Refresher	As a Callee, select UAC to use caller or proxy server as the refresher, or UAS to
	use the phone as the refresher.
Force INVITE	Session Timer can be refreshed using INVITE method or UPDATE method.
	Select “Yes” to use INVITE method to refresh the session timer.

Grandstream Networks, Inc.	GXP User Manual	Page 33 of 38
	Firmware 1.1.5.15	Last Updated: 12/2007