Basically, it would be part of the body of the INFO Message like SDP. 
Refer 3372 for more Info on SIP-T.

regards
Senthil Vinayagam


On Mon, 23 Aug 2004 prabhan wrote :
>In the RFC 2976 , it states:
>
>"
>  The following are a few of the potential uses of the INFO message:
>
>      - Carrying mid-call PSTN signaling messages between PSTN
>        gateways.
>
>      - Carrying DTMF digits generated during a SIP session.
>
>      - Carrying wireless signal strength information in support of
>        wireless mobility applications.
>"
>
>How are these messages conveyed in INFO packet ? Do we have to come up
>with some propriety headers to pass on this information or are there any
>standard headers ? Where can i find information regarding this ?
>
>Also i was reading on SIP Precednce mapping to MLPP Interworking draft.
>It has explained the usage on prority headers for prempting a call.
>Where can i find examples on priority usages ?
>
>Thanks in advance,
>Prabha N
>
>
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