[asterisk-users] Dual Ringing Tones

[Leo Ann Boon]

Troy - Purple Oranges wrote:
> Hi all and Happy New Year.
>
> I have a couple of interconnected asterisk boxes connected to several
> providers.  With one provider in particular (ATP in Australia) there
> are two ringing tones heard on outbound calls.  It is not the end of
> the earth - I am not reselling our services yet - but it is strange
> being that none of the other providers we are connected to exhibit
> that behavior.
I think your provider is providing early media. Check your sip messages, 
look for 183 with SDP in the response from the provider.

Leo