Grandstream Networks GXV3175 manual Tls, Account/Codec Settings

			reliability to SIP provisional responses (1xx series). This is very important in
			order to support PSTN internetworking. To invoke a reliable provisional
			response, the 100rel tag is appended to the value of the required header of
			the initial signaling messages. The default setting is No.
	SIP Transport		Selects the SIP transport method. There are three types: TCP, UDP and
			TLS.
	Symmetric RTP		Selects whether or not symmetric RTP is supported.
	Support SIP Instance ID		Selects whether or not SIP Instance ID is supported.
	Validate	Incoming	This configuration selects whether or not the incoming messages should be
	Messages		validated.
	SIP T1 Timeout		This configures the timeout period for SIP T1. The default setting is 0.5
			Seconds.
	SIP T2 Interval		This configures the time interval for SIP T2. The default setting is 4 seconds.
	Remove OBP from route		The SIP Extension notifies the SIP server that it is behind a NAT/firewall.
Account/Codec Settings
	Enable Video		--YES: Accepts all incoming video, this is the default setting;
			--NO: video is disabled.
			--Enable/Disable during dialing: Dialing time choice to enable/disable video
	DTMF		Assigns the mechanism to send DTMF. There are three supported modes:
			in audio (with DTMF as audio signals), through RTP and through SIP INFO.
	DTMF Payload Type		Sends DTMF using RFC2833. The default is 101.
	Preferred Vocoder		This products supports up to 8 different	Vocoders: including
			G.711(a/μ)(PCMU/PCMA),GSM,G726-32,G.723.1,G.729A/B, G.722 and
			L16-256.
			When this has been configured, the system will select the preferred vocoder
			from the list and the same order is sent with the SDP messages.
			The user can change the preferred vocoder priority order by toggling with
			the up and down buttons. It is recommended to use the default setting
			“PCMU”; if other vocoders are chosen, there could be an audio transmission
			error.
	Preferred Video Codec		Selects the preferred video codec from the available list. It is recommended
			to use H.264.
	H.264Payload type		Selects the dynamic H.264 codec payload type (ranges from 96-127). The
			default setting is 99.
Grandstream Networks, Inc.			GXV3175 USER MANUAL	Page 51 of 119
			FIRMWARE VERSION 1.0.0.32	Updated : 12/2010