Re: Uniqueness of context ID

I will also add that a ContextID is only unique among existing contexts on
the MG.  Once the LONG-TIMER (see Appendix D) expires for a Subtract Command
that removes the last termination from the context, that ContextID may be
re-used.  Remember that ContextIDs are assigned by the MG.

Note also that ContextIDs do not have to be unique in a physical MG.  If the
physical MG is partitioned into multiple virtual MGs, the ContextID only has
to be unique per VMG.

Kevin

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
Schwarz Albrecht
Sent: Wednesday, May 20, 2009 3:16 AM
To: [email protected]
Subject: Re: [Megaco] Uniqueness of context ID

Like to add:
there is a unique name space of ContextID values because there is a single
CA (H.248 Control Association) between a pair of MGC and MG entities.
(Please note that there is not any difference between a physical or virtual
MG, - there's just one CA.)



> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Raphael Tryster
> Sent: Mittwoch, 20. Mai 2009 07:58
> To: Priya Krishnan; [email protected]
> Subject: Re: [Megaco] Uniqueness of context ID
> 
> Yes.  It is actually quite likely to occur if multiple MGs initialize 
> at the same time and all start assigning context IDs from 1.
> 
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Priya Krishnan
> Sent: Wednesday, 20 May 2009 8:47 AM
> To: [email protected]
> Subject: [Megaco] Uniqueness of context ID
> 
> 
> Hi,
> 
> A context ID is unique within a physical MGW. But when we access a 
> context report at MGC [example a MSS] can we identify any report at 
> MSS using only context ID.
> 
> My thinking is since MGC connects to many MGW, it might have similar 
> context IDs with multiple MGWs. Example there could be a context ID 2 
> with MGW 1 and context ID 2 with MGW 4. In that case to identify a 
> particular context related info we might need a combination of virtual 
> MGW address and context ID. Is this understanding right? please 
> clarify.
> 
> Thanks and Regards
> Geetha
> 
> 
>       
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