ADSL Loses Sync on Incoming Calls - But NOT a noisy line...
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ADSL Loses Sync on Incoming Calls - But NOT a noisy line...
12-12-2014 10:29 AM
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Basically, if we receive a call on the landline the ADSL loses sync within about 30s (strange that it's not immediate?). After the call's ended it resyncs again fine.
What I've tested:
- Microfilters. I'm confident it's not the microfilter as I've tried three different filters, all different brands.
- Test socket. Still causes a disconnection.
- Line noise. The quiet line (17070 - 2) is perfectly clear with no noise
Other info:
- I'm not on LLU but I am on ADSL2+
- I have got the increased upload speed option (~1meg)
- My router is a DrayTek 2860n+
- Router stats are 35db attenuation and 9db SNR Margin with ZERO CRC errors
- Download speeds are ~11meg
- When the ADSL is up I have no problems with the internet connection
I think we're headed towards an engineer visit. I'm worried he'll try and blame the equipment but in my opinion I've ruled everything out.
Surely the router shouldn't be able to tell when the phone line is ringing? If it can be affected by calls then (as far as I can tell) it means either the filter is knackered (which I've tested) or there's some kind of problem on the line.
Anyone have any ideas?
Re: ADSL Loses Sync on Incoming Calls - But NOT a noisy line...
12-12-2014 11:25 AM
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The only idea I have ever had - but this has nver been acknowledged by OR staff is that the ring signal on the line is pulsing too strongly - too high a voltage perhaps dating from the days of mechanical phones with proper bells which required a stronger ring pulse to make them ring?
Re: ADSL Loses Sync on Incoming Calls - But NOT a noisy line...
12-12-2014 12:24 PM
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Sometimes these issues can be caused by the line card in the exchange.
All the steps you've gone through proves it isn't internal so I'm confident that there's a issue somewhere down the line.
If you raise a fault at http://faults.plus.net we can get this looked into.
Re: ADSL Loses Sync on Incoming Calls - But NOT a noisy line...
12-12-2014 12:35 PM
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No idea on the ring signal but my estate is very new (2004) and I believe it'll be served by a fairly new cabinet looking around the area so I'd have thought it unlikely.
My quandry is also somewhat complicated by me going to FTTC in the next few weeks....
Re: ADSL Loses Sync on Incoming Calls - But NOT a noisy line...
12-12-2014 1:13 PM
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Changing the line card didn't fix it
Eventually I got a very conscientious BT engineer who tested the line by looking at the error rates while phoning in
It was eventually fixed by changing my line from the cab to the exchange (I lost 1,000kbps in the process - 4,800 down to 3,800 but it fixed the problem)
Re: ADSL Loses Sync on Incoming Calls - But NOT a noisy line...
12-12-2014 1:16 PM
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I have raised a question ( See Question #96132562 ) would you be kind enough to look into it please ? This issue has been looked at at least half a dozen times before and no one has ever suggested a faulty line card though my DSLAM was swapped in the exchange 18 months ago in an attempt to solve random loss of sync! It was faulty ( Made no difference to sync cutting out on phone ringing but my ADSL connection speed improved by 100% and I would not want to sacrifice that .)
Sometimes our phone rings so loudly it nearly jumps out of its cradle, so could that could be due to an excessively strong ring signal caused by a line card fault ?
Quote from: Matthew Hi there.
Sometimes these issues can be caused by the line card in the exchange.
All the steps you've gone through proves it isn't internal so I'm confident that there's a issue somewhere down the line.
If you raise a fault at http://faults.plus.net we can get this looked into.
Re: ADSL Loses Sync on Incoming Calls - But NOT a noisy line...
12-12-2014 1:21 PM
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Quote from: Matthew Hi there.
Sometimes these issues can be caused by the line card in the exchange.
All the steps you've gone through proves it isn't internal so I'm confident that there's a issue somewhere down the line.
If you raise a fault at http://faults.plus.net we can get this looked into.
Sorry, I meant to add. Would you be able to add a note about the line card to my support case or do I need to add this myself?
Re: ADSL Loses Sync on Incoming Calls - But NOT a noisy line...
12-12-2014 1:22 PM
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Edit: Mine was a specific 20CN Max Premium issue so not directly related to this. The engineer directly clipped his test box on to the bare incoming wires and it was the same. He then went to the exchange and clipped directly on to the wires coming out of the line card and it was still the same!
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: ADSL Loses Sync on Incoming Calls - But NOT a noisy line...
12-12-2014 1:36 PM
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Here is the log of recent events from the router. The last four calls were made with the phone handset unplugged.
Dec 12 13:34:41 PPP link up (Internet) [80.229.12.140]
Info Dec 12 13:34:38 PPP CHAP Chap receive success : authentication ok
Info Dec 12 13:34:37 PPP CHAP Receive challenge (rhost = JUNOS)
Info Dec 12 13:34:37 PPP CHAP Receive challenge (rhost = bras-red11.ls-bas)
Warning Dec 12 13:34:20 PPP link down (Internet) [80.229.12.140]
Info Dec 12 13:34:05 FIREWALL event (1 of 2): deleted rules
Info Dec 12 13:34:05 xDSL linestate up (ITU-T G.992.1; downstream: 1920 kbit/s, upstream: 448 kbit/s; output Power Down: 16.6 dBm, Up: 12.3 dBm; line Attenuation Down: 63.5 dB, Up: 31.5 dB; snr Margin Down: 6.8 dB, Up: 10.0 dB)
Info Dec 12 13:33:46 xDSL linestate down
Info Dec 12 13:33:23 FIREWALL event (1 of 2): modified rules
Info Dec 12 13:33:23 FIREWALL event (1 of 2): created rules
Info Dec 12 13:33:23 xDSL linestate down
Warning Dec 12 13:29:54 PPP link up (Internet) [80.229.12.140]
Info Dec 12 13:29:50 PPP CHAP Chap receive success : authentication ok
Info Dec 12 13:29:50 PPP CHAP Receive challenge (rhost = JUNOS)
Info Dec 12 13:29:50 PPP CHAP Receive challenge (rhost = bras-red11.ls-bas)
Warning Dec 12 13:29:33 PPP link down (Internet) [80.229.12.140]
Info Dec 12 13:29:23 FIREWALL event (1 of 2): deleted rules
Info Dec 12 13:29:22 xDSL linestate up (ITU-T G.992.1; downstream: 1920 kbit/s, upstream: 448 kbit/s; output Power Down: 16.6 dBm, Up: 12.3 dBm; line Attenuation Down: 63.5 dB, Up: 31.5 dB; snr Margin Down: 6.8 dB, Up: 10.0 dB)
Info Dec 12 13:29:05 xDSL linestate down
Info Dec 12 13:28:51 FIREWALL event (1 of 2): modified rules
Info Dec 12 13:28:51 FIREWALL event (1 of 2): created rules
Info Dec 12 13:28:50 xDSL linestate down
Warning Dec 12 13:28:04 PPP link up (Internet) [80.229.12.140]
Info Dec 12 13:28:03 PPP CHAP Chap receive success : authentication ok
Info Dec 12 13:28:03 PPP CHAP Receive challenge (rhost = JUNOS)
Info Dec 12 13:28:03 PPP CHAP Receive challenge (rhost = bras-red11.ls-bas)
Warning Dec 12 13:27:46 PPP link down (Internet) [80.229.12.140]
Info Dec 12 13:27:25 FIREWALL event (1 of 1): deleted rules
Info Dec 12 13:27:25 xDSL linestate up (ITU-T G.992.1; downstream: 1920 kbit/s, upstream: 448 kbit/s; output Power Down: 16.6 dBm, Up: 12.3 dBm; line Attenuation Down: 63.5 dB, Up: 31.5 dB; snr Margin Down: 6.9 dB, Up: 10.0 dB)
Info Dec 12 13:27:07 xDSL linestate down
Info Dec 12 13:27:04 LOGIN User admin logged in on [HTTP] (from 192.168.1.68)
Info Dec 12 13:26:52 FIREWALL event (1 of 1): modified rules
Info Dec 12 13:26:52 FIREWALL event (1 of 1): created rules
Info Dec 12 13:26:52 xDSL linestate down
Info Dec 12 12:45:26 SNTP Synchronised to server: 212.159.6.10
Info Dec 12 11:45:26 SNTP Synchronised again to server: 212.159.13.50
Info Dec 12 11:23:30 FIREWALL event (1 of 1): deleted rules
Warning Dec 12 11:23:29 PPP link up (Internet) [80.229.12.140]
Info Dec 12 11:23:26 PPP CHAP Chap receive success : authentication ok
Info Dec 12 11:23:26 PPP CHAP Receive challenge (rhost = JUNOS)
Info Dec 12 11:23:25 PPP CHAP Receive challenge (rhost = bras-red11.ls-bas)
Info Dec 12 11:23:09 FIREWALL event (1 of 1): modified rules
Info Dec 12 11:23:09 FIREWALL event (1 of 1): created rules
Re: ADSL Loses Sync on Incoming Calls - But NOT a noisy line...
12-12-2014 1:40 PM
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Quote from: jelv If you plug the router filter direct in to the test socket without plugging in a phone, then ring your number do you see the same issue? When I had the same problem it was logging loads of errors on an incoming call even when there wasn't a physical phone to ring.
Edit: Mine was a specific 20CN Max Premium issue so not directly related to this. The engineer directly clipped his test box on to the bare incoming wires and it was the same. He then went to the exchange and clipped directly on to the wires coming out of the line card and it was still the same!
Still giving the same problem even with no phone plugged in whatsoever.
Re: ADSL Loses Sync on Incoming Calls - But NOT a noisy line...
12-12-2014 1:48 PM
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Re: ADSL Loses Sync on Incoming Calls - But NOT a noisy line...
12-12-2014 5:02 PM
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jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: ADSL Loses Sync on Incoming Calls - But NOT a noisy line...
14-12-2014 5:34 PM
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Re: ADSL Loses Sync on Incoming Calls - But NOT a noisy line...
15-12-2014 3:02 PM
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Any more information from anyone else would be gratefully received!
Re: ADSL Loses Sync on Incoming Calls - But NOT a noisy line...
15-12-2014 3:40 PM
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jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
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- ADSL Loses Sync on Incoming Calls - But NOT a nois...