Change the SDP connection information (c)

Hi guys I'm trying to change the SDP connection informaction for the outgoing INVITE from the SBC private side in order to say the remote part send the RTP to different IP adress.

 

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...

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v=0
o=amsip 0 0 IN IP4 10.230.105.3
s=talk
c=IN IP4 10.230.105.3
t=0 0
m=audio 20116 RTP/AVP 18 0 8 101
a=rtpmap:18 g729/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=AS:30

 

 

Im trying to do this

Any suggest guys?

 

 

sip-manipulation
        name                           SDP
        description                    Cambio de parametro C SDP
        split-headers
        join-headers
        header-rule