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.
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. It sounded interesting but never had the time to test it in production. l. 2010/1/6 Alex Balashov <abalas...@evaristesys.com> > One thing we've done for a couple customers in the past is write a > script that initiates a call (via AMI Originate command) out of a > termination provider, which loops back into an origination provider and > is received by the same Asterisk instance. Once the call is > established, DTMF digits are passed and verified received in both > directions. > > If this fails to take place or if the incorrect or incomplete digit > sequence is received, an SNMP trap was thrown via System(). > -- Loway - home of QueueMetrics - http://queuemetrics.com
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