"Luo, Helen" wrote:
> 
> Hi,
> 
> We had dilemma how to negotiate media capabilities when
> interworking with ISUP.

This should not be different than normal SIP media flows.
See the call flow examples spec:
http://www.ietf.org/internet-drafts/draft-ietf-sipping-call-flows-00.txt

-Jonathan R.

-- 
Jonathan D. Rosenberg, Ph.D.            72 Eagle Rock Avenue
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