I'm about 380m away from my Huawei 384 cab. Think the attenuation started off at around 12db in 2014. 13.8db now. 55/20 without G.INP @ 6db.

Agreed Robertos.

And if I remember my theory correctly from many decades back, the higher the frequency, the more concentrated towards the surface.

If the wire radius is doubled, then that surface area is quadrupled, reducing the effective resistance/impedance to about one-quarter (25%).

Taking a more likely maximum radius increase for phone wiring of 1.414... , then the surface area is doubled etc.

Help!

Is that a 3 db or 6db improvement?

I suspect 3 db, so my 13.4 db would reduce/improve to about 10.4 db Attenuation.

Hey Guys - thanks for all your comments, i have been advised by my ISP the copper distance is 300 meters, according to their records

Wonder if attenuation of 8.1 is in line with that distance ?

In reply to a post by asrab:

Hey Guys - thanks for all your comments, i have been advised by my ISP the copper distance is 300 meters, according to their records

Wonder if attenuation of 8.1 is in line with that distance ?

Mine is line attenuation of 11.7dB on downstream the GEA Test come back result was Estimated Line Length In Metres 243.6.

Not sure why is your 300 metres away with very low line attenuation of 8.1dB. Ask your ISP to sent you a GEA Test result to your email or ticket.

Here is example of my GEA Test result from my isp below:

GEA test below
Test Outcome Pass
Test Outcome Code GTC_FTTC_SERVICE_0003
Description No problem found, OAM test is not currently supported on this line.
Main Fault Location OK
Sync Status In Sync
Downstream Speed 80.0 Mbps
Upstream Speed 20.0 Mbps
Appointment Required N
Fault Report Advised N
NTE Power Status PowerOn
Voice Line Test Result Pass
Bridge Tap Not Detected
Radio Frequency Ingress Not Detected
Repetitive Electrical Impulse Noise Not Detected
Cross Talk Not Detected
Estimated Line Length In Metres 243.6
Upstream Rate Assessment Very Good
Downstream Rate Assessment Very Good
Home Wiring Problem Not Detected
Downstream Policing Discard Rate 0.0
Customer Traffic Level Upstream and Downstream Traffic Detected
Technology VDSL
Profile Name 0.128M-80M Downstream, Retransmission Low - 0.128M-20M Upstream, Error Protection Off
Time Stamp 2017-05-22T16:00:00
Parameters MIN MAX AVG
Down Stream Line Rate 80.0 Mbps 80.0 Mbps 80.0 Mbps
Up Stream Line Rate 20.0 Mbps 20.0 Mbps 20.0 Mbps
Up Time 900.0 Sec 900.0 Sec 900.0 Sec
Retrains 0.0 0.0 0.0
Current and Last 15 Minute Bin Performance
Parameters Last Traffic Count(Upto 15 mins) Current Traffic Count(Upto 15 mins)
Start Time Stamp 2017-09-27T14:28:32Z 2017-09-27T14:43:32Z
Ingress Code Violation 0 0
Egress Code Violation 0 0
Errored Seconds 0 0
Severely Errored Seconds 0 0
Unavailable Seconds 0 0

Guess i will need to ask them for a full report - it is after all talk talk, be back shortly guys, for interests to anyone here is my modem readings :

***********************************************

DSL synchronization status:
Up
Connection status:
Showtime
Upstream line rate (kbit/s):
18998
Downstream line rate (kbit/s):
70479
Maximum upstream rate (kbit/s):
19758
Maximum downstream rate (kbit/s):
85424
Upstream noise safety coefficient (dB):
6.2
Downstream noise safety coefficient (dB):
6.6
Upstream interleave depth:
239
Downstream interleave depth:
1
Line standard:
VDSL2
Upstream line attenuation (dB):
0.1
Downstream line attenuation (dB):
8.7
Upstream output power (dBm):
6.7
Downstream output power (dBm):
13.8
Channel type:
Fast
DSL up-time:
0 days 9 hours 40 minutes 40 seconds

**********************************************

Fore some reason the modem got rebooted,

Here is mine:

DSL
Line Status:
DSL Modulation Type:
Annex Type:
Upstream Downstream
Current Rate(kbps) 20000 80000
Max Rate(kbps) 30490 97085
SNR Margin(dB) 15.7 10.3
Line Attenuation(dB) 0 11.7
Errors(pkts) 0 0

Wonder why your sync is a lot higher than mine - when the attenuation is somewhat lower, may be its the service provider or crosstalk as i know all my neighbours are on fibre services

Nothing to do with the ISP.

In reply to a post by lee111s:

Nothing to do with the ISP.

Are you sure ? My neighbour on the left has Sky, thier Sync speed is higher than mine however my neighbour straight in front of me has Plusnet and is worse than mine,