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It depends on the type of sip end point, and how long it takes to respond to a SIP event.<br><br>For example if I connect a Cisco 7960 IP phone to my Asterisk server over the LAN, I always see registration times of over 100ms. <br><br>But if I connect X-Lite I get registration times of under 10ms.<br><br>Asterisk connected as a SIP client, under 2ms.<br><br>The higher latency with the Cisco's don't seem to effect performance at all.<br><br>--<br><br>Brad<br><br><br><br>> To: asterisk-users@lists.digium.com<br>> From: seandarcy2@gmail.com<br>> Date: Sat, 23 Oct 2010 12:31:58 -0400<br>> Subject: [asterisk-users] Why such high latency on internal lan?<br>> <br>> My internal lan is small, 100mb, all wired. aastra phones.<br>> <br>> sip show peers<br>> .......<br>> 142/... 10.10.10.42 D A 5060 OK (136 ms)<br>> 144/... 10.10.10.44 D A 5060 OK (138 ms)<br>> 145/... 10.10.10.45 D A 5060 OK (133 ms)<br>> <br>> But pings are < 1ms:<br>> <br>> ping 10.10.10.42<br>> ........<br>> rtt min/avg/max/mdev = 0.479/0.483/0.497/0.021 ms<br>> <br>> Why are the sip latencies so high? And is it a problem? And if so, how <br>> do I fix it?<br>> <br>> FWIW, latencies to outside providers over nat are close to ping:<br>> <br>> jnctn/.... 5060 OK (7 ms)<br>> teliax/... N 5060 OK (7 ms)<br>> <br>> ping <teliax ip address><br>> ........<br>> rtt min/avg/max/mdev = 3.471/4.120/4.466/0.288 ms<br>> <br>> <br>> sean<br>> <br>> <br>> <br>> <br>> <br>> <br>> <br>> -- <br>> _____________________________________________________________________<br>> -- Bandwidth and Colocation Provided by http://www.api-digital.com --<br>> New to Asterisk? Join us for a live introductory webinar every Thurs:<br>> http://www.asterisk.org/hello<br>> <br>> asterisk-users mailing list<br>> To UNSUBSCRIBE or update options visit:<br>> http://lists.digium.com/mailman/listinfo/asterisk-users<br> </body>
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