Both end devices should be using same codecs. set dtmf = rfc2833 and set canreinvite = no in sip.conf for both endpoints. This should solve the problem. you should also check which codecs support rfc2833 for dtmf and use that codec.
<br><br><div><span class="gmail_quote">On 3/29/07, <b class="gmail_sendername">Gordon Henderson</b> <<a href="mailto:gordon+asterisk@drogon.net">gordon+asterisk@drogon.net</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
On Wed, 28 Mar 2007, Alan Chandler wrote:<br><br>> I cannot seem to get any transfers to work at all. The console show I<br>> have #1 amd #2 set up for Blind and Attended Transfer, but when I hit<br>> these buttons on my handset nothing happens (other than I hear the dtmf
<br>> tones on the other end of the line).<br>><br>> roo*CLI> show features<br>> Builtin Feature Default Current<br>> --------------- ------- -------<br>> Pickup *8 *8
<br>> Blind Transfer # #1<br>> Attended Transfer #2<br>> One Touch Monitor *1<br>> Disconnect Call * *0<br>><br>><br>> I am using the tT options in my dial calls (via a macro)
<br>><br>> [macro-extension]<br>> exten => s,1,Dial(${ARG1},20,tT)<br><br>I had to fiddle with other things to make this work (needed for the<br>Siemens CP4600 SIP/DECT phone)<br><br>I found that the default timeouts were a bit tight for my likings (and the
<br>people who I was testing this with!)<br><br>So in features.conf I have:<br><br>transferdigittimeout = 8 ; Number of seconds to wait between digits when transfering a call<br>featuredigittimeout = 999 ; Max time (ms) between digits for
<br> ; feature activation. Default is 500<br><br>[featuremap]<br>blindxfer => #1 ; Blind transfer<br>atxfer => ## ; Attended transfer<br>disconnect => #0 ; Disconnect
<br><br>If it's still not working, are you sure the DTMF is being picked<br>up/transmitted correctly? If it's in-band, is it a codec other than G711?<br>(which might give you problems)<br><br>Gordon<br>_______________________________________________
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http://lists.digium.com/mailman/listinfo/asterisk-users</a><br></blockquote></div><br><br clear="all"><br>-- <br>Regards<br>Rizwan Hisham<br>Software Engineer