<div dir="ltr"><div><div><div>Hi,<br><br></div>I don't have a direct answer, but I've read several times about purposely customized system over the PSTN, echoing incoming incoming audio to produce metrics<br></div><div>when troubleshooting call quality.<br></div><div><br></div>I alse remember a thing called Recqual targeting the same goal.<br><br></div>I hope this helps<br></div><div class="gmail_extra"><br><div class="gmail_quote">2017-10-31 11:53 GMT+01:00 Antony Stone <span dir="ltr"><<a href="mailto:Antony.Stone@asterisk.open.source.it" target="_blank">Antony.Stone@asterisk.open.source.it</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi.<br>
<br>
Does anyone have some recommendations for measuring total end-to-end latency<br>
(by which I mean: the time between person A saying something and person B<br>
hearing it) when there are both SIP and PSTN/analogue/mobile legs in the call<br>
path?<br>
<br>
Examples:<br>
<br>
Person A has a SIP phone registered to Asterisk, which has a SIP trunk to a<br>
connectivity provider, who has connections to PSTN (analogue landline)<br>
connectivity providers and to mobile network (Vodafone, Orange, etc)<br>
providers.<br>
<br>
Person B might answer the call on an analogue landline telephone.<br>
<br>
Person C might answer the call on a mobile phone (perhaps on its home network,<br>
perhaps roaming on a foreign network).<br>
<br>
<br>
Is there any way to measure total latency of calls between A and B or A and C?<br>
<br>
<br>
Thanks in advance for any ideas / suggestions.<br>
<br>
<br>
Antony.<br>
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