Hi Roman,
      It should be exactly the same as the original
INVITE - it need not be recomputed using the ACK method.
Ref Section 22.1 of the RFC:
"UACs creating an ACK message will duplicate all of
the Authorization and Proxy-Authorization header field
values that appeared in the INVITE to which the ACK
corresponds."

Subhash.
Hughes Software Systems
http://www.hssworld.com



                                                                           
             Roman Shpount                                                 
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                                                                   Subject 
                                       [Sip-implementors] Credentials in   
             02/26/04 07:50 AM         ACK                                 
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           




RFC 3261 specifies that the ACK message must contain the same credentials
as the INVITE. In case of digest authentication, should those credentials
be exactly the same as the ones in the original INVITE, or should they be
re-generated for ACK method?

___________________________________
Roman Shpount, VP of Technology
aTelo, Inc. -- www.atelo.com







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