Grandstream Networks DP710 manual Vad

for On-Hold Call
Anonymous Call	Default is “No”. If set to “Yes”, anonymous call will be rejected.
Rejection
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.
Min-SE	Defines the minimum session expiration (in seconds). Default is 90 seconds.
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.
Enable 100rel	PRACK (Provisional Acknowledgment) method enables reliability to SIP provisional
	responses (1xx series).
	Codec Configuration
Preferred Vocoder	The DP715 supports up to 6 different Vocoder types including G.711 A-/U-law, G.726-32 ,
	G.723.1, G.729A/B and iLBC. The user can configure Vocoders in a preference list that
	will be included with the same preference order in SDP message. The first Vocoder is
	entered by choosing the appropriate option in “Choice 1”. The last Vocoder is entered by
	choosing the appropriate option in “Choice 6”.
VAD	Default is No. VAD allows detecting the absence of audio and conserves bandwidth by
	preventing the transmission of “silent packets” over the network.
Jitter Buffer Type	Select either Fixed or Adaptive based on network conditions.
Jitter Buffer Length	Select Low, Medium, or High based on network conditions.
SRTP Mode	Secure RTP protocol used for media transmission over VoIP. Disabled by default. Other
	modes are: enabled but not forced & enabled and forced.
G723 Rate	This defines the encoding rate for G723 vocoder. Default setting is 6.3kbps.
Use First Matching	Default is No. If set to “Yes”, device will include only the first match vocoder in its 200OK
Vocoder in 200OK SDP	response, otherwise it will include all match vocoders in same order received in INVITE.
iLBC Frame Size	This sets the iLBC size in 20ms or 30ms
iLBC Payload Type	Defines payload type for iLBC. Default value is 97. The valid range is between 96 and
	127.
Voice Frames per	This field contains the number of voice frames to be transmitted in a single packet. When
Packet	setting this value, the user should be aware of the requested packet time (used in SDP
	message) as a result of configuring this parameter. This parameter is associated with the

Firmware version 1.0.0.23 DP715/DP710 User Manual Page 45 of 52