NowSlow but stable - Then, fast and spikey

[#1]

A bit of advice please.  My current Draytek Vigor 2710 download speed is (today) 1642kbps, with an upload speed of 295kbps.  We have 2 pc's wired to the router, during the day its wireless capability is not used.  We changed to a plusnet business tarrif sometime ago.  Back on 2009 (with a Netgear DG834N) we had a connsction of arounf 6000kbps; have a look at the attached graph.  Is there any reason for the huge differences from 2009 to today?

[#2]

Unfortunately, no one commented. So my service speeds are normal then. Say no more, nudge nudge wink wink.

[#3]

Can you post the line stats from the router?

[#4]

I'm not sure what you mean. I can see fluctuations but the last report on the graph was showing just over 6300

[#5]

Thanks you for your query. The graph is my old one. currently my speed is 1642kbps

[#6]

Here are my router's stats
jim:red All caps removed as per Forum Rules mod:end

[#7]

No need to shout 
You have a major problem.
To save me reading back
Are you using the  test socket
Have you tried replacing filter/cable etc.
If you haven't already you need to raise a fault

[#8]

Hi OldJim,
Apologies for the Caps Lock being on.
I have just changed the splitter to a brand new one and yes it is pluhgged into the socket where my phone line enter the room which, incidentally is about 2 feet from the modem on my desk.  I reconnected and then run the speed test again and it recorded 1648kbps.
I'll raise a fault then.  Oh, BTW Thanks for your advice.

[#9]

That isn't the test socket so doesn't isolate your local wiring

[#10]

Oldjim: Having had access to the Master Socket last Friday, I was able to plug the phone line into that.  My speed has risen to (a very acceptable) 5600.  So does that mean that I leave the plug in the Master Socket or that I need to have the whole unit replaced please?
I did start the fault procedure but have today made the above enquiry.