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<div dir="auto"><span style="font-size: 12pt;">"Telstra had a nation-wide network outage last week that affected emergency services. </span></div><div dir="auto"><br></div><div dir="auto">The outage has been pinned on an obsolete Symmetricom SyncServer S300 node, which manages time on the network but resets its 10-bit week counter to zero every 1024 weeks (just under 20 years) in a common and well understood GPS rollover bug that caused the device to reset to 2006.</div><div dir="auto"><br></div><div dir="auto">The SyncServer S300 was discontinued in 2016."</div><div dir="auto"><br></div><div dir="auto">Cheers, </div><div dir="auto"><br></div><div id="aqm-signature" dir="auto" style="color: black;"><div dir="auto">Luke Thompson, CTO</div><div dir="auto">The Network Crew P/L</div><div dir="auto"><br></div><div dir="auto">E: luke.t@tnc.works</div><div dir="auto"><a href="https://tnc.works">https://tnc.works</a></div></div><div dir="auto"><br></div>
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<p style="color: black; font-size: 10pt; font-family: sans-serif; margin: 8pt 0;">On 9 July 2026 7:21:52 am Greg Price <greg@lakemountain.com> wrote:</p>
<blockquote type="cite" class="gmail_quote" style="margin: 0 0 0 0.75ex; border-left: 1px solid #808080; padding-left: 0.75ex;">
The stuff I've read and heard is that it was a software update across multiple systems that provide the reference sources from GNSS that went wrong causing the the reference date/time to jump back decades, and the wheels fall off. This is from the patchwork of sources, but I'd like to hear it definitively from engineers.<br id="lineBreakAtBeginningOfMessage"><div><br><blockquote type="cite"><div>On 9 Jul 2026, at 7:12 am, Phillip Grasso <phillip.grasso@gmail.com> wrote:</div><br class="Apple-interchange-newline"><div><div dir="auto">Do you think it was related to software patching breaking time services? (NTP?)</div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Wed, 8 July 2026, 2:48 pm DaZZa, <<a href="mailto:dazzagibbs@gmail.com">dazzagibbs@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">To paraphrase an oft-repeated meme<br>
<br>
It's not NTP<br>
There's no way it's NTP<br>
It was NTP<br>
<br>
Bets on this just being a speculator to take the heat off until they<br>
find out what really went wrong?<br>
<br>
D<br>
<br>
On Wed, 8 Jul 2026 at 14:34, Luke Thompson <luke.t@tnc.works> wrote:<br>
><br>
> Telstra's CFO has pointed to time / NTP:<br>
><br>
> <a href="https://www.theguardian.com/australia-news/2026/jul/08/telstra-outage-down-network-mobile-outages-today" rel="noreferrer noreferrer" target="_blank">https://www.theguardian.com/australia-news/2026/jul/08/telstra-outage-down-network-mobile-outages-today</a><br>
><br>
> Seems just over 4 hours of impact, and so far they're unsure what caused it.<br>
><br>
> Cheers,<br>
><br>
> Luke Thompson, CTO<br>
> The Network Crew P/L<br>
><br>
> E: luke.t@tnc.works<br>
> <a href="https://tnc.works/" rel="noreferrer noreferrer" target="_blank">https://tnc.works</a><br>
><br>
> On 8 July 2026 8:43:01 am Luke Thompson <luke.t@tnc.works> wrote:<br>
><br>
>> & likewise, service restored at the moment.<br>
>><br>
>> Cheers,<br>
>><br>
>> Luke Thompson, CTO<br>
>> The Network Crew P/L<br>
>><br>
>> luke.t@tnc.works<br>
>> <a href="https://tnc.works/" rel="noreferrer noreferrer" target="_blank">https://tnc.works</a><br>
>><br>
>><br>
>> On 8/7/2026 8:40 am, <a href="mailto:lauricat@fastmail.fm" target="_blank" rel="noreferrer">lauricat@fastmail.fm</a> wrote:<br>
>>><br>
>>> Good morning<br>
>>><br>
>>> Back here. Regional Vic Boost and T prepaid mobile data.<br>
>>><br>
>>> ----- Original message -----<br>
>>> From: <a href="mailto:lauricat@fastmail.fm" target="_blank" rel="noreferrer">lauricat@fastmail.fm</a><br>
>>> To: <a href="mailto:ausnog@lists.ausnog.net" target="_blank" rel="noreferrer">ausnog@lists.ausnog.net</a><br>
>>> Subject: [AusNOG] Telstra outage?<br>
>>> Date: Wednesday, 8 July 2026 7:44 AM<br>
>>><br>
>>> G'day.<br>
>>><br>
>>> How is T where you are?<br>
>>><br>
>>> Regional Vic Boost network no calls other than emergency can be made.<br>
>>><br>
>>> Cheers<br>
>>> Laurie<br>
>>><br>
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><br>
><br>
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