Re: Media flow managed by 2 terminations

> Does H.248.1 allow this?

I think so.
Guess that following aspect might be also relevant:

Does the D-channel carry 
a) just a single type of frames (e.g. exclusively X.25 traffic); or
b) a multiplex of s-, p- or/and f-type frames (e.g., a mix of Q.921 signalling, X.25 packet and frame relay traffic).

Possible alternatives to the considered ephemeral termination for the "X.25/D-channel/{16|64}TDM bearer":

1) static configuration, i.e., without any H.248 context, see ETSI TS 183002, § 7.3.2.2
-> using an X.25-over-SCTP bearer
-> 7.3.2.4.2	IUA/SCTP for X.25 or frame relay traffic

2) H.248 Mux termination
use case here: Figure 9 (ex 6)/H.248.1 - Multiplexed termination scenario - Single-to-multiple terminations
-> Circuit 1 = D-channel
-> StreamID = x: p-type (X.25) frames

3) SDP for TDM (old proposal: draft-taylor-mmusic-sdp-tdm-01.txt)
-> single physical termination
-> initially 'TDM'
-> after detection modified to 'PKT/TDM'

The attributes 
   a=netprof:<profile>
   a=e2eprof:<profile>
could be used to "profile the D-channel" for the specific type frames


Just some thoughts,
Albrecht

 

> -----Original Message-----
> From: [email protected] 
> [mailto:[email protected]] On Behalf Of Javi
> Sent: Mittwoch, 13. Juli 2011 17:36
> To: [email protected]
> Subject: [Megaco] Media flow managed by 2 terminations
> 
> Is it possible to manage a same flow by 2 termination (one 
> physical and another ephymeral)?
> 
> 
> Specifically, I need to manage the packet flows (SAPI 16) in 
> a D-channel 
> ISDN. My proposal is to use:
> 
> + A physical termination to manage the overall D-channel. When that 
> termination detects a packet flow (SAPI 16/TEI x), it would send a 
> notify to the MGC.
> 
> + MGC would create an ephemeral termination to manage that 
> packet flow 
> (SAPI 16/TEI x) and the physical termination should continue 
> to manage 
> the rest of packet flows (with different TEI) in that D-channel.
> 
> Does H.248.1 allow this?
> 
> 
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