It may be dependant on the hardware you're connecting to, the billion routers use the Broadcom chip set, which I'm sure would work best if it's Broadcom in the cabinet your're connecting to.
This is absolutely true, but in my case it made no difference whatsoever - and yes I have a broadcom based router (x6200) that I ran for a while and that still dropped the connection just as much.
if you're using openwrt aren't you introducing another unknown into your problem, I'm sure it works but can you be confident that there's isn't an issue with this code, for example it may work great with a good connection but does it handle errors correctly and efficiently, you've got quite a lot of upstream errors happening.
If you think about it the same could be said about other firmware, closed or open. Some closed firmware, even the PN H1 uses open source code. The upstream errors on my line are apparently because of aluminium, or so I've been told - IIRC the PNH1 reported a lot more errors.
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