Speedtouch site for individual countries have a specific telephone
numbers.

the speedtouch site www.speedtouch.nz has a good forum.

But to download user guides or CLI guides

www.speedtouch.com ... support...
has user guides and CLI guides for their whole product range.
Including the speedtouch 546.


before that, the failed solution was
google speedtouch 546 firewall cli guide
google speedtouch 546 firewall .pdf
brings up
ST546_UserGuide.pdf
ST546_CLIguide.pdf
but couldn't download them anywhere from google links.


Note- I foudn this is often the case.

For downloads Use the .com, or site of manufacture. (country specific
sites typically have nothing or not the full range)

For support - country specific site. unless they are incompetent, in
which case, the .com or coutnry of manufacture.

For forums, may be on a different site altogether(e.g. msi forum) - so
usually requires its own google. It could be the main .com, another
..com or rarely - as in speedtouch case - a country specific site.