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tarbat
Aspiring Expert
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Message 1 of 10

Home Hub 5 and ADSL

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Tomorrow (31st) we're due to switch-over to BT Infinity, so yesterday I received our new Home Hub 5.  Set it up as instructed by BT, but for the whole of yesterday it was up and down every few minutes, constantly renegoiating the connection.  Is this normal when still using a HH5 with an ADSL connection instead of Infinity?

 

This morning I switched back to using the HH3, and connection is rock-solid, no reconnecting all the time.

 

So, looking at the HH5 logs, I can see that it re-connects every few minutes, and constantly switches between PPPoE and ETHoE, is that normal?

 

07:54:10, 30 Dec. (44998.620000) PPPoA is up -? VPI: 0, VCI: 38 Down Rate=6080Kbps, Up Rate=448Kbps; SNR Margin Down=6.1dB, Up=23.0dB
07:53:57, 30 Dec. (44985.420000) ETHoA is up -? VPI: 0, VCI: 35 Down Rate=6080Kbps, Up Rate=448Kbps; SNR Margin Down=6.1dB, Up=23.0dB
07:52:13, 30 Dec. (44881.910000) PPPoA is up -? VPI: 0, VCI: 38 Down Rate=5760Kbps, Up Rate=448Kbps; SNR Margin Down=7.0dB, Up=24.0dB
07:51:30, 30 Dec. (44838.740000) ETHoA is up -? VPI: 0, VCI: 35 Down Rate=5760Kbps, Up Rate=448Kbps; SNR Margin Down=7.1dB, Up=24.0dB
07:41:39, 30 Dec. (44247.210000) PPPoA is up -? VPI: 0, VCI: 38 Down Rate=6208Kbps, Up Rate=448Kbps; SNR Margin Down=6.2dB, Up=24.0dB
07:40:56, 30 Dec. (44204.350000) ETHoA is up -? VPI: 0, VCI: 35 Down Rate=6208Kbps, Up Rate=448Kbps; SNR Margin Down=6.1dB, Up=24.0dB
07:40:13, 30 Dec. (44161.310000) PPPoA is up -? VPI: 0, VCI: 38 Down Rate=5920Kbps, Up Rate=448Kbps; SNR Margin Down=5.6dB, Up=24.0dB
07:39:30, 30 Dec. (44118.390000) ETHoA is up -? VPI: 0, VCI: 35 Down Rate=5920Kbps, Up Rate=448Kbps; SNR Margin Down=6.2dB, Up=24.0dB
07:38:29, 30 Dec. (44057.610000) PPPoA is up -? VPI: 0, VCI: 38 Down Rate=5856Kbps, Up Rate=448Kbps; SNR Margin Down=5.7dB, Up=24.0dB
07:37:46, 30 Dec. (44014.620000) ETHoA is up -? VPI: 0, VCI: 35 Down Rate=5856Kbps, Up Rate=448Kbps; SNR Margin Down=6.0dB, Up=24.0dB
07:37:02, 30 Dec. (43971.000000) PPPoA is up -? VPI: 0, VCI: 38 Down Rate=5824Kbps, Up Rate=448Kbps; SNR Margin Down=5.6dB, Up=23.0dB
07:36:19, 30 Dec. (43927.880000) ETHoA is up -? VPI: 0, VCI: 35 Down Rate=5824Kbps, Up Rate=448Kbps; SNR Margin Down=6.8dB, Up=23.0dB
07:34:53, 30 Dec. (43841.600000) PPPoA is up -? VPI: 0, VCI: 38 Down Rate=6240Kbps, Up Rate=448Kbps; SNR Margin Down=6.1dB, Up=24.0dB
07:34:10, 30 Dec. (43798.580000) ETHoA is up -? VPI: 0, VCI: 35 Down Rate=6240Kbps, Up Rate=448Kbps; SNR Margin Down=6.5dB, Up=24.0dB
07:20:37, 30 Dec. (42985.290000) PPPoA is up -? VPI: 0, VCI: 38 Down Rate=5248Kbps, Up Rate=448Kbps; SNR Margin Down=8.6dB, Up=24.0dB
07:19:54, 30 Dec. (42942.190000) ETHoA is up -? VPI: 0, VCI: 35 Down Rate=5248Kbps, Up Rate=448Kbps; SNR Margin Down=7.2dB, Up=24.0dB
06:58:52, 30 Dec. (41680.370000) PPPoA is up -? VPI: 0, VCI: 38 Down Rate=5856Kbps, Up Rate=448Kbps; SNR Margin Down=7.0dB, Up=24.0dB
06:58:42, 30 Dec. (41670.330000) ETHoA is up -? VPI: 0, VCI: 35 Down Rate=5856Kbps, Up Rate=448Kbps; SNR Margin Down=6.8dB, Up=24.0dB

 

Is this problem likely to resolve itself when we switch-over to BT Infinity?

 

Information for Helpdesk agents

When contacting the BT Broadband helpdesk, the agent might ask you for details about your BT Home Hub. This page contains all of the information they are likely to request. 

1. Product name: BT Home Hub
2. Serial number: +068543+NQ53426490
3. Firmware version: Software version 4.7.5.1.83.8.204 (Type A) Last updated Unknown
4. Board version: BT Hub 5A
5. DSL uptime: 0 days, 00:01:06
6. Data rate: 448 / 6112
7. Maximum data rate: 1144 / 6112
8. Noise margin: 24.0 / 6.2
9. Line attenuation: 25.0 / 46.8
10. Signal attenuation: 25.0 / 46.1
11. Data sent/received: 0.1 MB / 0.2 MB
12. Broadband username: bthomehub@btbroadband.com
13. BT Wi-fi: Yes
14. 2.4 GHz Wireless network/SSID: ghnetsecure
15. 2.4 GHz Wireless connections: Enabled (802.11 b/g/n (up to 144 Mb/s))
16. 2.4 GHz Wireless security: WPA2
17. 2.4 GHz Wireless channel: Automatic (Smart Wireless)
18. 5 GHz Wireless network/SSID: ghnetsec50
19. 5 GHz Wireless connections: Enabled (802.11 a/n/ac (up to 1300 Mb/s))
20. 5 GHz Wireless security: WPA2
21. 5 GHz Wireless channel: Automatic (Smart Wireless)
22. Firewall: Default
23. MAC Address: 8c:10:d4:06:a4:7a
24. VPI/VCI: 0 / 38
25. Modulation: G.992.1 Annex A
26. Latency type: Fast
27. Software variant: AA
28. Boot loader: 1.0.0

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Distinguished Sage
Distinguished Sage
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Message 2 of 10

Re: Home Hub 5 and ADSL

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The HH5 is not really suitable for ADSL, unless you are on a very short line. It tends to see any noise on the line, as a possible VDSL signal, and will try to keep swapping modes.

 

tarbat
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Message 3 of 10

Re: Home Hub 5 and ADSL

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Thanks Keith. So, what do I do?  BT say I must setup the new HH5 before they switch me over to BT Infinity.  If I continue to use the old HH3, will the BT engineer refuse to switch the links in the cabinet to enable VDSL when he comes tomorrow?

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Distinguished Sage
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Message 4 of 10

Re: Home Hub 5 and ADSL

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The Openreach technician will simply route your line via the fibre cabinet, then most likely give you a call. You can then swap over to the HH5.

Either that, or wait until you see the HH3 disconnect, then change over to the HH5.

 

Its a good idea to check you wiring to make sure there are no extensions wired into your internal wiring, as that will upset Infinity.

 

The fact that the HH5 is losing connection on ADSL, could indicate interference being picked up on extension wiring.

 

Your line attenuation is quite high, so you are probably on a long line, which will also be prone to high frequency noise pickup, which is upsetting the HH5.

 

 

 

tarbat
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Message 5 of 10

Re: Home Hub 5 and ADSL

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Okay, thanks Keith.  I'll probably setup the HH5 tomorrow morning and make do until we get switched to BT Infinity.  I don't want BT giving any excuses for not switching us, we've waited so long for this day!!  I am surprised that BT don't warn customers not to use the HH5 with ADSL though.

 

And yes, we're about 4km from the exchange, so already do very well with a speed of around 5Mbps, suggesting that the line quality is pretty good.  Internally, we have no extensions, and the line to the HH3 is directly connected to the ADSL part of the Openreach split faceplace.

 

We're only 0.7km from the new fibre cabinet, so hopefully we'll get good VDSL speeds.

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Message 6 of 10

Re: Home Hub 5 and ADSL

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Quite a bit of electrical noise is going to be picked up over 4KM. The HH3 will reject this as its out of band for ADSL, which has an upper frequency limit of about 2MHz.

 

 

tarbat
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Message 7 of 10

Re: Home Hub 5 and ADSL

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Thanks Keith, very informative.  Presumably the HH5 doesn't reject the electrical noise over the 4km line as out of band, and so tries to switch over to VDSL?

 

Maybe BT should consider the current line length before instructing the customer to "plug your new hub in straight away so everything is ready for when your Infinity starts - the new hub will work with your current service too."

 

All the resets has forced my IP Profile back down to 4mbps now 😞

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Message 8 of 10

Re: Home Hub 5 and ADSL

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I suppose that some long lines are going to be fairly clear of noise, especially if they are underground.

Overhead sections are another issue.

 

Another thing to consider is that some customers on the same local cable as you, will already have VDSL, so that your pair of wires will be picking up crosstalk from those working circuits, that the HH5 is trying to switch to.

 

tarbat
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Message 9 of 10

Re: Home Hub 5 and ADSL

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Just to close the loop on this.  BT Infinity activated, and connected at 39993 downstream, 9999 upstream, and getting 37Mbps.  I'm just about the first in our village to get BT Infinity, with quite a few others getting activated in the new year.

SpeedTest

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Message 10 of 10

Re: Home Hub 5 and ADSL

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Smiley HappySmiley Happy

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