Re: About fax flow of G.711

Hi Albrecht,

Thanks for so detail information.

 

Regards,

Gary

 

  _____  

From: Schwarz Albrecht [mailto:[email protected]] 
Sent: Wednesday, July 15, 2009 12:02 AM
To: Gary Li; [email protected]
Subject: 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: [email protected] [mailto:[email protected]] On Behalf Of
Gary Li
Sent: Montag, 13. Juli 2009 11:16
To: [email protected]
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

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