Re: Action to be taken on "SV Restart - Reason 900"

Hello Prabuddha,
 
you are right that Annex F is not going in down into more details, but I
would assume that behaviour (2) is aimed when using reason '900', which
indicates that the termination is 'InService' (IS) state again.
 
This implies that the ServiceState was before "not IS".
 
Whether the "call/session service" may be continued ("preserved") or
terminated is conditional, e.g. may
- dependent on the call phase (call establishment vs active call),
- period of "out-of-service" phase, or/and
- call service type.
 
I would assume that the general case might lead to call/bearer (or H.248
Termination) preservation, but wouldn't exclude conditions where a call
release would be a more appropriate action.
This decision is up to the MGC, - and because this H.248 entity has
exactly the knowledge about above listed conditions.
 
Such specific conditions are out of scope of Annex F/H.248.1 itself,
they could be rather detailed in H.248 profile specifications.
 
And complementary:
ETSI 183 025 call independent procedures pointing more in the direction
of (2), - and not (1) (because a SUBTRACT procedures is not indicated)
-, but would exclude the option in supporting also (1).
 
Regards,
Albrecht
 
 


________________________________

	From: [email protected] [mailto:[email protected]]
On Behalf Of CHATURVEDI PRABUDDHA
	Sent: Freitag, 29. August 2008 07:56
	To: [email protected]
	Subject: [Megaco] Action to be taken on "SV Restart - Reason
900"
	Importance: High
	
	
	Hi,
	 
	Can any one suggest what action to be taken once we receive 
	SV      method = restart 
	           reason  = 900" service restored"
	          on a Phy termination 
	          and no timer running: 
	as stated in the doc H.248 "F.3.4 MG Service Restoration " -
	The reason will indicate what action may be taken.
	 but I find no doc or discussion on  functionality based on
reasons.
	 
	Will the behavior include
	1. subtraction of the physical termination.
	or
	2. The call will be preserved. 
	 
	Generally decision are taken based on Method "restart", hence
call is released.
	 
	Kindly suggest.
	 
	BR
	Prabuddha C

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