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<p class=MsoNormal>When using the SendDTMF I send *84085551212 in order to
transfer calls on a SIP channel with RFC2833 DMTF mode. The issue is that
the DTMFs getting passed are at a very high volume when heard by the transferee
before the transfer actually initiates. Furthermore I need to space the
DTMFs out by at least 300-400ms in order for it to work consistently.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>What I am looking to do is decrease or eliminate the volume
at which these DTMFs are heard. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I have narrowed down this function in indications.c:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>int ast_playtones_start(struct ast_channel *chan, int vol,
const char *playlst, int interruptible)<o:p></o:p></p>
<p class=MsoNormal>{<o:p></o:p></p>
<p class=MsoNormal> char *s, *data =
ast_strdupa(playlst); /* cute */<o:p></o:p></p>
<p class=MsoNormal> struct
playtones_def d = { vol, -1, 0, 1, NULL};<o:p></o:p></p>
<p class=MsoNormal> char *stringp;<o:p></o:p></p>
<p class=MsoNormal> char *separator;<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> if (vol < 1)<o:p></o:p></p>
<p class=MsoNormal>
d.vol = 7219; /* Default to -8db */<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> d.interruptible =
interruptible;<o:p></o:p></p>
<p class=MsoNormal> …<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Why is vol defaulted to 7219? What is the significance
of that number?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>When I tried to change that value to a negative, low (1-10),
or very high number I did not notice any change with the DTMF volume.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Are there other values that need to be changed – or am
I missing something? <o:p></o:p></p>
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