Ceteris paribus 😇

In reply to a post by davidw87:

I still have the Raspberry Pi, via telnet, logging SNR every few seconds.

You may find the router doesn’t like one IP accessing via Telnet and another via HTTP and allocates its resources to the first. Your SNR increasing could just be a UI bug.

Hitting the telnet interface every few seconds may be too much, try reducing this to 30 seconds or every 60 seconds.

In reply to a post by DFScale:

In reply to a post by davidw87:

Just to add another layer of intrigue, ...

In your position, I would be getting the wiring sorted and not looking too closely until that is done. Obviously the router is not happy, but you won't make sense of anything until the wiring is resolved.

Yes, I'm definitely going to get that wiring replaced. It's weird about the router playing up in the ways I described though - perhaps it's nearing the end of its life after 4.5 years.

Just an update on this:

I've not been able to have the internal wiring sorted yet, but I bought a second hand Billion router from eBay (the 8800NL v1, which is apparently better than the v2).

I tried it and it synced at 46Mbps and the SNR margin was rock solid at 5db. Clearly the original router had become faulty hence its lower sync speed and the fluctuating SNR. I still plan to sort the internal wiring but it's not so urgent now.

I'm still monitoring the SNR for now. It's been rock solid for days but this morning it jumped, literally within a few seconds, from 5.9dB-ish to 8.8dB-ish. No resync occurred. The attainable rate is showing at 54Mbps - faster than anything I've ever had on this line.

The digital voice switchover's happening in my area this month. Is it possible a 'neighbouring' line had their voice switched off which has reduced noise etc. and means my line could now get a higher speed? I'll see what happens with the SNR but it's been solid at 8.8/8.9dB for a few hours now. Strange this jump happened without a resync.

Edited by davidw87 (Mon 03-Feb-25 11:08:33)

Noise margin can change without a resync and if you reboot while you're noise margin is higher than 5 or 6 you should get closer to your max speed.

Interestingly, at about 2:30pm the SNR suddenly dropped back to 6dB, having been 8.7-8.8 solidly for over four hours.

This isn't the usual SNR issue caused by noise or a faulty router, so I still suspect some sort of exchange work given the switchover that's happening in the next couple of weeks here.

Not a big deal but just intriguing!