<div>I think I spoke to a company in Finland that does something like that, but instead of sending DTMF they send a predefined file containing actual voice samples and reference tones. </div><div><br></div><div>They have a piece of software that analyzes what comes back, compares it to the reference source and computes a number of audiometric measures, like MOS estimators plus the obvious packet loss, jitter, etc.</div>
<div><br></div><div>It sounded interesting but never had the time to test it in production.</div><div>l.</div><div> <br></div><br><div class="gmail_quote">2010/1/6 Alex Balashov <span dir="ltr"><<a href="mailto:abalashov@evaristesys.com">abalashov@evaristesys.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">One thing we've done for a couple customers in the past is write a<br>
script that initiates a call (via AMI Originate command) out of a<br>
termination provider, which loops back into an origination provider and<br>
is received by the same Asterisk instance. Once the call is<br>
established, DTMF digits are passed and verified received in both<br>
directions.<br>
<br>
If this fails to take place or if the incorrect or incomplete digit<br>
sequence is received, an SNMP trap was thrown via System().<br>
</blockquote></div><br clear="all"><br>-- <br>Loway - home of QueueMetrics - <a href="http://queuemetrics.com">http://queuemetrics.com</a><br><br>