<div dir="ltr"><br>Then there's this one:<br><a href="http://www.itnews.com.au/news/telecom-nz-hands-out-cdma-phones-after-3g-network-failure-165889">http://www.itnews.com.au/news/telecom-nz-hands-out-cdma-phones-after-3g-network-failure-165889</a> <div><br></div><div>and this one:</div><div><a href="https://wirelesse2e.wordpress.com/2011/05/02/another-outage-more-lessons-geo-redundancy-couldnt-prevent-verizon-lte-service-disruption/">https://wirelesse2e.wordpress.com/2011/05/02/another-outage-more-lessons-geo-redundancy-couldnt-prevent-verizon-lte-service-disruption/</a><br></div><div><br></div><div>A lot of it has to do with the massive increase in signalling as each user terminal tries to re-register with the HLR/HSS (3G/4G respectively).</div><div><br></div><div>That's why when you bring them back on you have to do it gradually... it is a highly reliable system generally and 4G is definitely more so than 3G.</div><div><br></div><div><br></div><div>Narelle</div><div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Feb 11, 2016 at 1:00 PM, Roland Dobbins <span dir="ltr"><<a href="mailto:rdobbins@arbor.net" target="_blank">rdobbins@arbor.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On 11 Feb 2016, at 6:55, TWIG Solutions wrote:<br>
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Same thing occurred there, if and RNG failed, if the switch-over to the standby failed for some reason, the resulting registration storm caused the network to fall-over for 18 hours.<br>
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<<a href="http://users.csc.calpoly.edu/~jdalbey/SWE/Papers/att_collapse.html" rel="noreferrer" target="_blank">http://users.csc.calpoly.edu/~jdalbey/SWE/Papers/att_collapse.html</a>><br>
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Roland Dobbins <<a href="mailto:rdobbins@arbor.net" target="_blank">rdobbins@arbor.net</a>><div class="HOEnZb"><div class="h5"><br>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><br><br>Narelle<br><a href="mailto:narellec@gmail.com" target="_blank">narellec@gmail.com</a></div>
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