There is no way in SIP to tell someone that you are inband tones.<div><br></div><div>Rather you tell them you&#39;re using out-of-band RFC2833 or INFO.</div><div><div><br></div><div><br><div><br><div class="gmail_quote">On 18 January 2013 05:19, <a href="mailto:support@ecn.net.au">support@ecn.net.au</a> <span dir="ltr">&lt;<a href="mailto:support@ecn.net.au" target="_blank">support@ecn.net.au</a>&gt;</span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">(perhaps not telling the PBX that<br>
we are using inband).</div></blockquote></div><br><br></div></div></div>