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[Megaco] Control of T.38-to-V.152 interworking; RE: About fax control mode

Gary,
 
guess your outlined control modes are consider the positioning of an H.248 MG between an IP and PSTN/ISDN domain.
Concerning the next scenario of IP-to-IP interworking, you may have a look in Draft V.IP2IP-VxF.
There's an H.248 example flow in Appendix II ...
 
-Albrecht
 
TD 13R1 (WP 1/16)
Draft ITU-T Rec. V.IP2IP-VxF - Realtime Facsimile Services for IP peering: Procedures for T.38-to-V.152 interworking

Appendix II H.248 bearer establishment procedure examples. 14

II.1........ Introduction. 14

II.2........ MG state transitioning: MGC-strict controlled method versus MG autonomous transitioning  14

II.3........ Example network model 14

II.3.1..... H.248 decomposed gateway model 14

II.3.2..... Example media capability negotiation process on call/session control level 15

II.4........ Example signalling. 17

II.4.1..... Auditing supported capabilities. 17

II.4.2     Creating a V.152-to-T.38 Context 17

From: megaco-bounces at ietf.org [mailto:megaco-bounces at ietf.org] On Behalf Of Gary Li
Sent: Mittwoch, 26. August 2009 07:00
To: 'Deepak Bissa'; megaco at ietf.org
Subject: Re: [Megaco] About fax control mode

Hi Deepak,

 

Yes, I got the answer at the Annex E2.2.

Thanks a lot,

 

Regards,

Gary

 

From: Deepak Bissa [mailto:deepak.bissa at aricent.com]
Sent: Wednesday, August 26, 2009 11:36 AM
To: Gary Li; megaco at ietf.org
Subject: RE: [Megaco] About fax control mode

 

Hi Gary,

ITU-T Rec. T.38 (Appendix III) describes the softswitch control and MG Autonomous switchover to fax.

Packages used in softswitch control fax e.g. ctyp, fax and ipfax are published in ITU-T Rec. H.248.2.

 

With regards,

Deepak Bissa

From: megaco-bounces at ietf.org [mailto:megaco-bounces at ietf.org] On Behalf Of Gary Li
Sent: Wednesday, August 26, 2009 7:23 AM
To: megaco at ietf.org
Subject: [Megaco] About fax control mode

 

Hi,

 

About fax mode, there are four control mode.

1.       non-control

2.       RTCP control

3.       softswitch control

4.       Auto VBD(gateway self-negociate)

 

Can any one help me clarify the means of above fax mode?

And what the MGC behaviour when choose the mode?

 

PS: I can’t find it at any IETF or ITU document. If anyone knows, pls tell me.

Any information will be appreciated!

Thanks

 

Regards,

Gary

 

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