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[art37]

I have been on 80/20 FTTC for just under a year. Speeds and profiles have never changed in that time. I am about 200M from the cabinet and I have been getting 76/16.5 most times of the day. Following an early morning interruption last week, things have gone awry.

Up             Down        Sync          Bras
9000           56230   58092   TR101   Auto   14-Feb-2013 05:22   14-Feb-2013 05:22
19996   68511   70780   TR101   Auto   13-Feb-2013 18:29   13-Feb-2013 18:29
19996   68755   71032   TR101   Auto   13-Feb-2013 12:52   13-Feb-2013 12:52
19996   68573   70844   TR101   Auto   13-Feb-2013 09:18   13-Feb-2013 09:18
18996   56660   58536   TR101   Auto   11-Feb-2013 10:12   11-Feb-2013 10:12
19000   56230   58092   TR101   Auto   11-Feb-2013 05:05   11-Feb-2013 05:05
19996   68573   70844   TR101   Auto   11-Feb-2013 03:32   11-Feb-2013 03:32
19996   68755   71032   TR101   Auto   09-Feb-2013 05:08   09-Feb-2013 05:08
20000   77433   79996   TR101   Auto   08-Feb-2013 16:53   08-Feb-2013 16:53
20000   77433   79996   TR101   Auto   08-Feb-2013 16:52   08-Feb-2013 16:52
1108        37401   38640   TR101   Auto   08-Feb-2013 16:45   08-Feb-2013 16:45
19996   77433   79996   TR101   Auto   18-Oct-2012 00:27   18-Oct-2012 00:27

My VDSL2 capable modem/router also lost connection on the 8th after a period of instability. It would, however, still connect PPPoE via LAN to the OR-provided ECI modem. I ran diagnostics as required by the manufacturer but they revealed nothing. As the replacement modem has connected to the line, my modem/router manufacturer has agreed a replacement. Yesterday, (at 12.52) I connected the ECI modem to a new Airport Express via PPPoE LAN. The synch rate increased throughout the day. The re-synch at 18.29 was associated with a disconnect following an incoming phone call. This is the first time that this has occurred with FTTC; however, I recall that a similar thing happened for a couple of months when I transferred to 21CN a couple of years ago. In sum, I am now running FTTC off an OR-installed data extension with a corded phone off an existing extension. The faceplate is the filtered type fitted by OR when FTTC was installed. Everything has been fine on both 21CN and FTTC for 2 years up until 1.05AM on the 8th February. Within the property, there is nothing more that I can check or change.

Grateful for any thoughts as to whether this might be a HR fault on the line between the cabinet and my home?

[waltergmw]

 Hi Art,

That's a very good guess. I'd wait say overnight and try again. If the result is the same that adds to the indication.  The wait is in case the damp or whatever has to creep back in.

Also I'd be interested to know whether your speed remains capped if a fault is discovered and rectified.

Kind regards,
Walter
(Nearly at Arkholme for B4RN)

[burakkucat]

Grateful for any thoughts as to whether this might be a HR fault on the line between the cabinet and my home?

That is certainly a possibility which would account for the VDSL2 service disconnecting upon an incoming PSTN call being received. Have you used the 'quiet line test' (call 17070, option 2) and if so, was there anything noticeable?

[art37]

I have run the quiet line test using a corded phone from the test socket and all I get is the usual quiet background hum. For the past 2 years, my adsl/vdsl and phones have all been run from a Fritz!Box. This box uses a splitter lead so I have had the 21CN/phone connected to a phone extension and VDSL to an OR-fitted Data Extension. I was getting 17M+ down on a 21CN line and from April last year 75+/16.5M on FTTC. My customer portal shows no further re-synchs overnight and a couple of external calls haven't resulted in any loss of service. As the OR modem has synched at 56.23/10.78 with actual speeds of 54.56/10.78 I am inclined not to touch anything until my replacement Fritz!Box arrives from Berlin.

[burakkucat]

A 'quiet background hum' is most certainly not normal nor 'usual' for a telephony circuit operating within the defined specifications.

Is the hum that you hear identical to 50 Hz mains hum? If yes, I suspect that you have an earth contact fault developing somewhere within the pair.

[art37]

I have just checked again and it is by no means totally silent. Listening hard, I can hear a low amount of static rather than a hum per se. That said, the calls that came in during the day and evening yesterday had no effect on my broadband connection. I confess that I did go against my better judgement and, yesterday early pm, I disconnected the modem for 30 minutes. I have just checked my customer portal and it shows that at 6am my synch was increased to 73444 (18996 up and 70993 down). Given that things are going in the right direction, I intend to sit firmly on my hands until my replacement modem/router arrives. Thanks again for all the help/advice.

[burakkucat]

Careful observation, without interaction, is often the best technique. 

[art37]

Hi Art,

That's a very good guess. I'd wait say overnight and try again. If the result is the same that adds to the indication.  The wait is in case the damp or whatever has to creep back in.

Also I'd be interested to know whether your speed remains capped if a fault is discovered and rectified.

Kind regards,
Walter
(Nearly at Arkholme for B4RN)

I am still waiting to get my modem/router back from Germany. The interim solution of ECI modem plus Airport Express is working well and synch returned to normal this morning without me having to power down.

20000   77436   80000   TR101   Auto   24-Feb-2013 07:19   24-Feb-2013 07:19
19000   70989   73340   TR101   Auto   22-Feb-2013 12:04   22-Feb-2013 12:04 *
18996   70993   73344   TR101   Auto   16-Feb-2013 06:17   16-Feb-2013 06:17
19000   56230   58092   TR101   Auto   14-Feb-2013 05:22   14-Feb-2013 05:22

I will update this thread when I get my Fritz!Box back.

* I didn't realise until I saw this log entry that activating Guest Access on an Airport Express results in a resynch. I know now!!

[art37]

A replacement Fritz!Box 7390 arrived from Germany yesterday. It connected immediately but the stats are a little odd compared to what they were before I started having issues with my line. The max downstream attainable has dropped from 96000 to 84252: there has been a slight increase in upstream to 28742. Min DSLAM throughput was 125 up and down but it is now reading 40000/10000. Impulse Noise Protection downstream is now 3 when before, both up and downstream, INP was 0. Downstream SNR has also fallen from 15 to 7 with a line attenuation of 10. Of further note, I am now getting downstream FECs of 5400/min whereas before these were negligible. I am now getting max throughputs on an 80/20 connection. It will interesting to see if the downstream INP reduces over time. I assume that if it does then max attainable downstream will increase? I shall continue to wait and watch.




 

[burakkucat]

I'm not aware of any fellow Kitizens with experience of the Fritz!Box, so your observations and occasional reports are adding to the knowledge-base. 

[art37]

This is a single screenshot showing some of the information available in the Fritz!Box GUI. I also get push emails daily giving key DSL information and whenever there has been a re-synch.

[art37]

There is definitely something in the BT system controlling my line. For the past 36 hours, my router log has shown a constant downstream FEC rate of 324,000 errors per hour with only a handful of CRCs. At lunchtime today, my line disconnected and immediately came back at the same attainable speeds of 84 down and 28 up and downstream INP of 3 but the FEC error rate has now dropped to 81,000 errors per hour. Two hours on there are no other errors. I have been following a customer/ISP rep exchange on IDNetters about FTTC line speeds after a line fault and the customer is complaining that his line hasn't returned to its previous speed. My max attainable downstream speed is now about 18 less than it was 2 months and 13 less than it was this time last month. I am fortunate in that I am close to a FTTC cabinet. Does it follow that if a user has a longer line to his cabinet that increased downstream INP may be what is limiting the line; that is, to a down speed less than 80? Does an ISP have access to this type of line information because at the moment the ISP seems to have run out of suggestions?