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Re: [Megaco] About fax flow of G.711

Guess that "G.711 fax" in you email means "V.152 VBDoIP with G.711 as VBD codec".
 
V.152 is the only *explicit* method which allows the MGC to unambiguously indicate G.711 usage for voiceband data traffic (= modem based bearer traffic).
See
ITU-T Rec. V.152, clause 7.1.1     Mechanism for indicating support of V.152 using H.248/Megaco
with regards to your question.
 
Not using V.152 for "G.711 fax" is a root cause for confusion concerning interoperability, because mixing audio (VoIP) and voiceband data (VBDoIP) modes, particularily if G.711 shall be used for both (Audio & VBD).
=> thus, V.152 for "G.711 fax"

From: megaco-bounces at ietf.org [mailto:megaco-bounces at ietf.org] On Behalf Of Gary Li
Sent: Montag, 13. Juli 2009 11:16
To: megaco at ietf.org
Subject: [Megaco] About fax flow of G.711

Hi,

 

What about the call flow of G.711 fax?

Is it totally same as the normal call flow with G.711?

Could someone give me such capture packet or text flow?

 

Any help will be appreciated.

Thanks,

 

Regards,

Gary