media agnostic MGs (Border gateway/routers - modes of operation); RE: Info needed.

See responses inline.
See also:
http://www.ietf.org/mail-archive/web/megaco/current/msg08025.html
 
/Albrecht


________________________________

	From: [email protected] [mailto:[email protected]] On Behalf Of shashanka bhat
	Sent: Donnerstag, 27. November 2008 07:42
	To: [email protected]
	Subject: [Megaco] Info needed.
	
	
	Hi , 
	
	
	    I have some queries about Megaco.
	
	    1) What is media agnostic MGs ?.
	[[Schwarz, Albrecht]] The term is defined in ETSI TISPAN ES 283 018 V2 & TS 183 018 V3, 
	see clause 3.1.
	The subject is further detailed in Annex G "Illustration of BGF modes of operation"
	 
	    2) How will MG indicate to MGC that it is media agnostic ?.
	[[Schwarz, Albrecht]] Via the H.248 Stream Descriptor, which contains the *media* description.
	... and these are primarily the SDP elements in the H.248 LD & RD, thus the MGC framework is given by § 5.15 & 5.16 on allowed SDP in H.248
	 
	    3) Is IA (Interface between SPDF and BGF in IMS) Profile version 1 is Media agnostic ?.
	[[Schwarz, Albrecht]] Right, see § 5.15 & 5.16 in ES 283 018 V1. ["m=- X - -"] 
	[[Schwarz, Albrecht]] BTW: "IA" = "Ia" (or do you mean the MSF Implementation Agreements (IAs) on Ia-based Session Border Gateways?) 
	
	    4) Any documents to explain the Media Agnostic MGs ?.
	[[Schwarz, Albrecht]] See e.g. 
	* Annex G
	* TISPAN 19bTD020 WI-03145 H.248 Ia Profile Version 3 - New Annex "Illustration of Protocol Layer Lx based Packet Processing BGF modes"
	http://docbox.etsi.org/TISPAN/TISPAN/50-Meetings/20081128-19Bis/19bTD020_WI-03145_H.248_Ia_Profile_Version_3_-_New_Annex_%E2%80%9CIllustration_of_Protocol_Layer_Lx_based_Packet_Processing_BGF_modes%E2%80%9D.doc
	* or in future the new TISPAN WI-3202 on "Operational Aspects of Border Gateway/Routers - Guidlines for Ia profile versions" (don't know the exact WI title ...)
	
	
	Thanks.
	
	-- 
	Giri Prasad.

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