[reSIProcate] About the SDP

[Karlsson <boost.regex@xxxxxxxxx>]

Hi all, sorry for my stupid question:

 

With the SDP likes this:

 

v=0
o=- 15677358 15677358 IN IP4 192.168.1.128
s=call
c=IN IP4 20.98.1.12
t=0 0
m=audio 20288 RTP/AVP 18 98 101
a=fmtp:18 annexb=no
a=fmtp:101 0-15
a=ptime:20
a=rtpmap:18 G729/8000
a=rtpmap:98 iLBC/8000
a=rtpmap:101 telephone-event/8000

 

 

This SDP inclued two IPs. which should be using by the RTP channel ?

 

thanks