Re: TDMPW and MeGaCo/SDP

I agree, TDMoIP is an option only.

But, if it is used, MGC would use SDP at Local/Remote MeGaCo 
descriptors. How may be that SDP description for TDMoIP?

> However, there was never any H.248 Profile standardized with 
> /*multirate*/ support, at least to my knowledge.
> (I'm aware of vendor specific profile, but that are proprietary 
> solutions.)
>

I would be interested to know any of that proprietary solutions. May you 
indicate me any?

>
> __
> /*Y.2262 PSTN/ISDN emulation and simulation, Appendix IV
> Examples of emulation of PSTN and N-ISDN bearer services
> *(This appendix does not form an integral part of this Recommendation)
>
> Examples for the emulation of PSTN and N-ISDN bearer services are 
> provided:
>
> 1) Monorate bearer services (= 1 × 64-kbit/s digital bearer in PSTN/ISDN)
> . ITU-T Recommendations I.231.2 and I.231.3 may be emulated by a 
> single RTP
> session, with or without RTP control protocol (RTCP), using an RTP 
> profile according
> to IETF RFC 3551.
> . ITU-T Recommendation I.231.1 may be emulated by a single RTP 
> session, with or
> without RTCP, using RTP clearmode according to IETF RFC 4040.
>
> 2) Multirate bearer services (= N × 64-kbit/s digital bearer in 
> PSTN/ISDN; N greater than one)
> . ITU-T Recommendations I.231.4 to I.231.10 may be emulated by TDMoIP 
> described
> in ITU-T Recommendation Y.1453.
>
> /
> > -----Original Message-----
> > From: [email protected]
> > [mailto:[email protected]] On Behalf Of Javi
> > Sent: Samstag, 29. Januar 2011 02:13
> > To: [email protected]
> > Subject: [Megaco] TDMPW and MeGaCo/SDP
> >
> > Assuming the next situation:
> >
> > ISDN Terminal 1  -   MG1 -  [IP network] -  MG2   -   ISDN Terminal 2
> >
> > where the MGs (Media Gateway) are controlled by a MGC (Media Gateway
> > Controller) via MeGaCo[H.248.1].
> >
> > [ITU-T Y.2262 / Annex IV] proposses that MGs may transport
> > ISDN B-channels over the IP network:
> >
> > + By a single RTP session (when monochannels ISDN services)
> >
> > + Or by TDMoIP (= UDP TDMPWs), when multichannels ISDN services.
> >
> >
> > How may MGC indicate to the MG that it uses PWs at the IP termination?
> >
> > It may be done by MeGaCo, using SDP[RFC4566] at Local/Remote
> > descriptors. However, how may be that SDP description of TDMPWs?
> >
> > Thanks,
> >
> > Javier Muñoz
> >
> >
> > _______________________________________________
> > Megaco mailing list
> > [email protected]
> > https://www.ietf.org/mailman/listinfo/megaco
> >

_______________________________________________
Megaco mailing list
[email protected]
https://www.ietf.org/mailman/listinfo/megaco