Grandstream Networks HT502 Anonymous Call, Rejection, Special Feature, Session Expiration, Min-SE

	Anonymous Call	Default is No. If set to Yes, incoming calls with anonymous Caller ID will be rejected
	Rejection	with 486 Busy message.
	Special Feature	Default is Standard. Choose the selection to meet some special requirements from
		Softswitch vendors.
	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.
		Once 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 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.
	Send Re-INVITE After	Default is No, If set to “Yes”, device will send an INVITE with audio vocoders upon
	Fax	completion 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
	Vocoder in 200OK SDP	200OK response, otherwise it will include all match vocoders in same order received in
		INVITE.
	Preferred Vocoder	The HT502 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, iLBC and AAL2. 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”.
		Vocoder types can also be changed per call basis by using a star code. Please see the
		“Call features” section.
	G723 Rate	Default is 6.3kbps. Defines the encoding rate for G.723 vocoder.
	iLBC Frame Size	Sets the iLBC frame 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.
	AAL2-G726-16 Payload	Default value is 100. Range is from 96 to 127.
	type
	AAL2-G726 - 24	Default value is 99. Range is from 96 to 127.
	Payload type
	AAL2-G726 - 32	Default value is 104. Range is from 96 to 127.
	Payload type
	AAL2-G726 - 40	Default value is 103. Range is from 96 to 127.
	Payload type
	G729E payload type	Default value is 102. Range is from 96 to 127.
Grandstream Networks, Inc.		HT-502 User Manual	Page 27 of 32
		Firmware Version 1.0.4.2	Last Updated: 06/2011