[asterisk-users] T38 negotiations in RTP

Ujjval Karihaloo ujjval at simplesignal.com
Tue Oct 13 22:23:34 CDT 2009


T38 rfc does not detail the sequence of t30 negotiations..
Like v21 preamble, nsf, Dsi, what the correct sequence of t30  
negotiation. Is.

On Oct 13, 2009, at 8:57 PM, "Kevin P. Fleming" <kpfleming at digium.com>  
wrote:

> Ujjval Karihaloo wrote:
>> Is there any t38 spec which details the T30 negotiations that occur  
>> in
>> the Media/RTP PAth like the NSF, DSI etc frames that are exchanges
>> between T38 gateways/endpoints.
>
> The T.38 recommendation defines how T.30 negotiations are carried in  
> IFP
> (Internet Fax Protocol) packets; the definitions of the actual frames
> are in the T.30 recommendation itself.
>
> -- 
> Kevin P. Fleming
> Digium, Inc. | Director of Software Technologies
> 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
> skype: kpfleming | jabber: kpfleming at digium.com
> Check us out at www.digium.com & www.asterisk.org
>
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