[AusNOG] Telstra outage?

[Luke Thompson]

"Telstra had a nation-wide network outage last week that affected emergency 
services.

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.

The SyncServer S300 was discontinued in 2016."

Cheers,

Luke Thompson, CTO
The Network Crew P/L

E: luke.t at tnc.works
https://tnc.works
On 9 July 2026 7:21:52 am Greg Price <greg at lakemountain.com> wrote:
> 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.
>
>
>> On 9 Jul 2026, at 7:12 am, Phillip Grasso <phillip.grasso at gmail.com> wrote:
>>
>>
>> Do you think it was related to software patching breaking time services? (NTP?)
>>
>>
>> On Wed, 8 July 2026, 2:48 pm DaZZa, <dazzagibbs at gmail.com> wrote:
>>
>> To paraphrase an oft-repeated meme
>>
>> It's not NTP
>> There's no way it's NTP
>> It was NTP
>>
>> Bets on this just being a speculator to take the heat off until they
>> find out what really went wrong?
>>
>> D
>>
>> On Wed, 8 Jul 2026 at 14:34, Luke Thompson <luke.t at tnc.works> wrote:
>>>
>>> Telstra's CFO has pointed to time / NTP:
>>>
>>> https://www.theguardian.com/australia-news/2026/jul/08/telstra-outage-down-network-mobile-outages-today
>>>
>>> Seems just over 4 hours of impact, and so far they're unsure what caused it.
>>>
>>> Cheers,
>>>
>>> Luke Thompson, CTO
>>> The Network Crew P/L
>>>
>>> E: luke.t at tnc.works
>>> https://tnc.works
>>>
>>> On 8 July 2026 8:43:01 am Luke Thompson <luke.t at tnc.works> wrote:
>>>
>>>> & likewise, service restored at the moment.
>>>>
>>>> Cheers,
>>>>
>>>> Luke Thompson, CTO
>>>> The Network Crew P/L
>>>>
>>>> luke.t at tnc.works
>>>> https://tnc.works
>>>>
>>>>
>>>> On 8/7/2026 8:40 am, lauricat at fastmail.fm wrote:
>>>>>
>>>>> Good morning
>>>>>
>>>>> Back here. Regional Vic  Boost and T prepaid mobile data.
>>>>>
>>>>> ----- Original message -----
>>>>> From: lauricat at fastmail.fm
>>>>> To: ausnog at lists.ausnog.net
>>>>> Subject: [AusNOG] Telstra outage?
>>>>> Date: Wednesday, 8 July 2026 7:44 AM
>>>>>
>>>>> G'day.
>>>>>
>>>>> How is T where you are?
>>>>>
>>>>> Regional Vic Boost network no calls other than emergency can be made.
>>>>>
>>>>> Cheers
>>>>> Laurie
>>>>>
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