I am connected directly to the test socket, which is in my upstairs office wired by BT in about 2007 so reasonably new.Hi there.
I feel the problem is at the exchange connection, as my wiring has not changed
This may seem a bit pedantic, but were you connected to the test socket when the drop in speed occurred? This could be significant. If you weren't, and plugged into the normal socket, do you have any other extension sockets, or connect the modem/router with any phone extension leads?
Could you also post the DSL stats - sync speeds, noise margin (SNRM) & attenuation and preferably including any CRC and ES error figures.
Can you also do a Quiet Line Test 17070 option 2, see if you can hear any crackles or other noises on the line.
Thanks for your reply and queries and you are not being pedantic.
The upstairs socket is the only BT socket in the house and my connection has been from the plug test socket with the face removed to expose it this has been connected like this since 2007 so no change.
I have done the Quiet Line Test 17070 option 2 and there are no crackles or other noises but if I switch to speakerphone with my ear to the loudspeaker the is a very slight hum.
My DSL stats are as follows taken from the ASUS DSL-N55U ADSL Log below.
Modulation : ADSL2+
Annex Mode : Annex A/L
Line State : up
Lan Tx : 28012341
Lan Rx : 14108431
ADSL Tx : 5521329
ADSL Rx : 10935662
CRC Down : 0
CRC Up : 250
FEC Down : 0
FEC Up : 45681
HEC Down : 2303
HEC Up : 0
SNR Up : 6.3
SNR Down : 6.6
Line Attenuation Up : 23.1
Line Attenuation Down : 44.0
Data Rate Up : 1123
Data Rate Down : 6650
Hope this is what you require if not please ask again.
The decrease in speed is not effecting my browsing that much perhaps a slight time lag in updating a web page and my Netflix still buffers with out reloading but it is that feeling if my original speed has degraded by 2.0 Mbps within one year will it continue to loose connection speed in the future, better to ask now if there is something wrong and get it looked into and fixed.
I have bye the way used the Plusnet Trouble-shooter to register my concerns.