[Megaco] About fax control mode

["Gary Li" <garyli0314 at gmail.com>]

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