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<font face="Verdana">Interesting... If one can take the report at
face value they mention that the 911 centers could see the phone
number of the caller and then was able to call them back.
Assuming this is a VoIP system, honestly what phone system isn't
these days, this tells me that the SIP traffic was making it
through but the audio data was not. These are typically carried
on different network ports and require specific firewall rules to
allow them through. There is a common problem with VoIP system
refereed to as 'one-way audio' in which the calls are connected
but only one of the parties can hear the other. This situation is
almost always caused by a misconfiguration of a firewall. It
could also have been a defense mechanism whereby some firewalls
can block specific ports if it sees 'unusual' activity on a port.<br>
<br>
If this was the case no amount of redundancy/failover would have
helped - the system wasn't down, calls were still going through.<br>
<br>
73,<br>
<br>
T.<br>
</font><br>
<div class="moz-cite-prefix">On 06/19/2024 22:03, Juan Jiménez
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CANxHLxS6LRPSs7Y1oB0F0wW1nCo1x+yuhKMG=i6BMUDihaLNfw@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="auto"><a
href="https://www.boston25news.com/news/local/massachusetts-officials-reveal-cause-hourslong-911-system-outage/FA22RGI3QBB6FBPWLJMKO7SOFM/"
moz-do-not-send="true" class="moz-txt-link-freetext">https://www.boston25news.com/news/local/massachusetts-officials-reveal-cause-hourslong-911-system-outage/FA22RGI3QBB6FBPWLJMKO7SOFM/</a></div>
<br>
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