On Telstra, they brought in an external auditor and the report was recently release:
* Post: https://www.telstra.com.au/exchange/what-we-ve-learned-from-...
* Report: https://www.telstra.com.au/content/dam/tcom/dynamic-media-pr...
* Post: https://www.telstra.com.au/exchange/what-we-ve-learned-from-...
* Report: https://www.telstra.com.au/content/dam/tcom/dynamic-media-pr...
Edit: That's it!? It's also not clear on whether it was a configuration or a firmware issue (or both). It sounds like maybe there was some battery backed ram or something that reset maybe?
Edit number 2: Ok I re-read it and it is better than I thought, still many questions though.