Hello,

I am trying to get to Jain Sip softphones to call one another via an Asterisk 
server.  When I call from phone 1 to phone 2 there is audio transmission both 
ways, but when I call from phone 2 to phone 1 I don't get audio transmission 
and reception both ways.  When I look at the asterisk log file it has an entry 
which says:
"Oooh, format changed to 2". 

Would anyone know why this is occuring one way and not the other, and more 
importantly, how would I fix this.  After some examination I see that when I 
send the OK to the INVITE, this SDP body should have a 0 for the codec which is 
ulaw.  When this Ok message gets to the other pc after going through asterisk 
it seems like asterisk adds a codec because the SDP body now contains the 
codecs 0 and 3.  I believe the problem has something to do with this but I am 
not sure why it would work one way but not the other.

Any help would be greatly appreciated.

Thanks very much,

Denis Kutman


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