<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Mar 25, 2023 at 1:44 PM rjmcmahon via Starlink <<a href="mailto:starlink@lists.bufferbloat.net">starlink@lists.bufferbloat.net</a>> wrote:</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
The point of the thread is that we still do not treat digital communications infrastructure as life support critical.</blockquote><div><br></div><div>When I was younger there was a standard way to do this. Fire alarms had a dedicated pair directly to the fire department or a local alarm station. This wasn't dial-tone, it was a DC pair that would drop a trouble notification if DC was interrupted, and I think it would reverse polarity to indicate alarm. If DC was interrupted, that would also turn off the boiler in the building.<br></div><div><br></div><div>Today my home fire alarms are wireless and have cellular back to their main Comcast connection, and detect CO, smoke, and temperature. This would not meet insurance requirements for a commercial building, they still have all of the sensors wired, with cellular backup.</div><div><br></div><div>I don't think you are considering what life-support-critical digital communications would really cost. Start with metal conduit and fire-resistant wiring throughout the structure. Provide redundant power for <i>every</i> fan-out box (we just had a 24-hour power interruption here due to storms). AT&T provides 4 hour power for "Lightspeed" tombstone boxes that fan out telephone, beyond that a truck has to drive out and plug in a generator, or you are out of luck if it's a wide-are outage like we just had. Wire areas in a redundant loop rather than a tree. Supervise every home so that interruptions are serviced automatically. Provide a 4-hour SLA.</div><div><br></div><div>The phone company used to do what you are asking for. The high prices this required are the main reason that everyone has jumped off of using the legacy telco for telephony.<br></div></div></div>