BB slowed from 74Mbps to 35Mbps

[imjolly]

If you were on 40/10mb that would not affect your attainable speed but your attainable is only 40mb suggesting there is a problem with connection. I would connect to test socket with filter and see if that improves connection stats

[Jamesvolvo]

Update - Openreach texted to say that they've fixed it.

It's still syncing at 20 down 8 up but I notice that the noise margin has improved from 3 to 6

- is that interesting? should I expect it to start speeding up?

thanks

Product code:Hub

Serial number:+091298+2208011585

Firmware version:v0.44.00.04123-BT

Firmware updated:Sat Jan 18 18:38:52 2025

Board version:R01

GUI version:1.80 11_07_2023

DSL uptime:0 days,00 Hours07 Mins23 Secs

Data rate:8.953 Mbps / 20.433 Mbps

Maximum data rate:8.953 Mbps / 21.064 Mbps

Full Fibre (FTTP) Mode:Off

Noise margin:6.1 / 6.1

Line attenuation:41.7 / 45.8

Signal attenuation:44.9 / 44.6

VLAN id:101

Upstream error control:Off

Downstream error control:Off

Data sent / received:25.4 MB Uploaded / 97.0 MB Downloaded

Broadband username:bthomehub@btbroadband.com

Public Wi-fi status:Not active

2.4 GHz wireless network name:BT-93CW72

2.4 GHz wireless channel:Smart (Channel 11)

5 GHz wireless network name:BT-93CW72

5 GHz wireless channel:Smart (Channel 36)

Wireless security:WPA2

Wireless mode:Mode 1

Firewall:On

MAC address:18:58:80:53:A4:5C

Software variant:-

Boot loader: 0.1.7-BT (Thu Nov 30 09:45:22 2017

[licquorice]

3 to 6 is not an improvement, it is a deterioration.

DLM will start off at 6dB and might improve to 3dB but even if it does, you will not get much more than 21/22 Mbps

[TimCurtis]

@Jamesvolvo 

Effectively your speed has halved and one reason for that would be that 1 of 2 wires supplying you is broke.

Your broadband will function with that but at half the speed.

Ideally if you get get hold of a corded phone and plug it in you'd get nothing which would prove the fact that 1 cable somewhere is broke.

You could try plugging into the test socket and see if that's an improvement and if there is then your internal wiring is at fault otherwise it's an OpenReach issue.

[imjolly]

have you tried using the test socket with a filter to se if that increases your connection

i note that your attenuation is now 45 whereas previously it was 41 suggesting further from cabinet or line interference giving a slower speed

[Jamesvolvo]

I'm a little confused then as to why Openreach are saying that they've fixed the fault. I'll try the test socket.

[Jamesvolvo]

I can't try the test socket, sorry, don't have a filter. FWIW, the situation is pretty straightforward. The external wire comes in to the back of the Openreach MK3 socket. There's a black wire from the socket to the HH. And that's it. There's no analogue phone here at all - it's all digital via the HH.

Just spoke to BT and from their POV the fault is open with Openreach, so no idea why I was sent a text saying that the fault has been fixed.

[TimCurtis]

@Jamesvolvo 

Just take off the front cover of the MK3 and try the test socket anyway.

Do you have another cable you can try as it's very clear from everything posted that only 1 wire is working. That would I think explain the stats about noise margin etc.

You need to eliminate internal issues so as to point the finger at OpenReach physical line issues.

[Jamesvolvo]

ok we're all good now

Posting final set of measurements in case someone is kind enough to sanity check them.

I'm seeing about 72 on fast.com now. Assume OR have replaced a wire or something. There's been no obvious activity by men up ladders so I imagine a rat had got in the cab or some-such.

Any idea why max speed is 99/30? are they capping at 80/20 somehow?

Product code:Hub

Serial number:+091298+2208011585

Firmware version:v0.44.00.04123-BT

Firmware updated:Sat Jan 18 18:38:52 2025

Board version:R01

GUI version:1.80 11_07_2023

DSL uptime:0 days,02 Hours41 Mins14 Secs

Data rate:20 Mbps / 79.999 Mbps

Maximum data rate:30.273 Mbps / 99.047 Mbps

Full Fibre (FTTP) Mode:Off

Noise margin:12.3 / 10.1

Line attenuation:7.5 / 14.4

Signal attenuation:7.5 / 15.4

VLAN id:101

Upstream error control:Off

Downstream error control:Off

Data sent / received:2.1 GB Uploaded / 5.0 GB Downloaded

Broadband username:bthomehub@btbroadband.com

[imjolly]

These stats are great and back to where your connection should be. The attainable is as it says what your line is capable of but fibre 2 is capped at 80/20