Session-level value overriden by media-level value in SDP (RFC 4566)

Hi,

 

      For example, a SIP message has the following SDP:

 

      v=0
   ;   c=IN IP4 0.0.0.0
    ;  t=2873397496 2873404696
      m=audio 49170 RTP/AVP 0

 ;     a=sendonly

 

   I would like to know whether a=sendonly or c=IN IP4 0.0.0.0 should take into effect in this particular case.

  ; From RFC 4566:

   ============

 ;

   Section 5, Page 8 mentions the following:

 

   An SDP session description consists of a session-level section
   followed by zero or more media-level sections.  The session-level
   part starts with a "v=" line and continues to the first media-level
   section.  Each media-level section starts with an "m=" line and
   continues to the next media-level section or end of the whole session
   description.  In general, session-level values are the default for
   all media unless overridden by an equivalent media-level value.
 

 

 ; Section 5, Page 10 mentions the following:

 

   [The connection ("c=") and attribute ("a=") information in the
   session-level section applies to all the media of that session unless
   overridden by connection information or an attribute of the same name
   in the media description.]

 

 ;  I find the above ;statements to be slightly contradictory.

 

   Please clarify.

 

Thanks,

Jagan ;