Recently I moved into the central city (Auckland) and have been experiencing excruciatingly slow internet speeds in the order of 1.5 (day) - 2.5 Mbps (night) and a tonne of connection issues so I decided to figure out what's up and want to know about this adaptor and why it has the components in it that it does.
It's a 3-wire RJ45 sccket coming from the building, and ends in a Britishin Telecom socket (the normal) which is also 3-wire. However there is a 250v rated 150k resistor across two wires and something in the order of a 27k on the other two (my eyes are full of chlorine and I can't really see what the colours are on it at the moment). Why is that and what does it achieve? I have never seen resistors used as AC arrestors or protective devices like that before. And what kind of effect does it have on my SNR both ways?
I was thinking of scrapping them since it then feeds into an ADSL splitter anyway which likely has protection built in.
And my other question is about the filter. Since my line won't sync on ADSL2+ and instead falls all the way back to annex-L (:O), could there be an issue with the filter being an ADSL type and not ADSL2+ (1.1-2.2MHz upper corner difference).