[Spce-user] mismatch codecs in certain calls

[Andrew Pogrebennyk]

Hi Joan,
no, the line you have posted is proprietary to some vendor and serves
only information purpose I think.. The codec preferences are sent in the
message body (lines below Content-Length in INVITE and 200 OK of your
'ngrep-sip' trace). You have to compare the lists of both parties, the
first common codec will be used. The negotiation is transparent to
sip:provider.

On 02/14/2013 01:39 PM, Joan Cifre (ibred) wrote:
> Hi all,
> we are experiencing problems with certain calls. The call is stablished
> but we speakers can't hear each other. This is happening just with
> certain calls and with certain peerings, so I'm almost sure this is not
> a NGCP problem. However, I think this is due to a bad codec negotiation.
> I can see this line i certaing calls
> 
> P-RTP-Stat:
> PS=828,OS=16560,PR=446,OR=71360,PL=0,JI=0,LA=0,DU=9,EN=G729a,DE=G711a'
> 
> Does it means that one server is sending streams with G729a codec and
> the other one with G711a codec? Which one decides which codec use if
> both are in the list?
> Thanks for the support.
> Joan