Grandstream Networks GXW40XX user manual Sdp

Subscribe for MWI	Default is No. When set to “Yes” a SUBSCRIBE for Message Waiting Indication will be
	sent periodically.
Send Anonymous	If this parameter is set to “Yes”, the “From” header along with Privacy and
	P_Asserted_Identity headers in outgoing INVITE message will be set to anonymous,
	blocking Caller ID.
Anonymous Call	Default is No. If set to Yes, incoming calls with anonymous Caller ID will be rejected with
Rejection	486 Busy message.
Special Feature	Default is Standard. Choose the selection to meet some special requirements from
	Softswitch vendors. Example of vendors - CBCOM, RNK.
Session Expiration	Grandstream implemented SIP Session Timer. The session timer extension enables SIP
	sessions to be periodically “refreshed” via a SIP request (UPDATE, or re-INVITE. When
	the session interval expires, if there is no refresh via a UPDATE or re-INVITE message,
	the session will be terminated.
	Session Expiration is the time (in seconds) at which the session is considered timed out,
	if no successful session refresh transaction occurs beforehand. The default value is 180
	seconds.
Min-SE	The minimum session expiration (in seconds). The default value is 90 seconds.
Caller Request Timer
	If selecting “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 selecting “Yes” the phone will use session timer even if the remote party does not
	support this feature. Selecting “No” will allow the phone to enable session timer only
	when the remote party support this feature.
	To turn off Session Timer, select “No” for Caller Request Timer, Callee Request Timer,
	and Force Timer.
UAC Specify	As a Caller, select UAC to use the phone as the refresher, or UAS to use the Callee or
Refresher	proxy server as the refresher.
UAS Specify	As a Callee, select UAC to use caller or proxy server as the refresher, or UAS to use the
Refresher	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.
Send Re-INVITE After	Default is No, If set to “Yes”, device will send an INVITE with audio vocoders upon
Fax	completition of Fax to continue session in audio only.
Use First Matching	Default is No. If set to “Yes”, device will include only the first match vocoder in its 200OK
Vocoder in 200OK	response, otherwise it will include all match vocoders in same order received in INVITE.
SDP
Preferred Vocoder	The GXW40XX supports up to 5 different Vocoder types including G.711 A-/U-law,
	G.726 (Supports bit rates 16, 24, 32 and 40), G.723.1, G.729A/B/E 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 8”.
G723 Rate	Defines the encoding rate for G.723 vocoder. By default, 6.3kbps rate is chosen.
iLBC Frame Size	Sets the iLBC frame size in 20ms or 30ms
Grandstream Networks, Inc.		GXW40XX User Manual	Page 33 of 38
		Firmware 1.0.4.2	Last Updated: 06/2011