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Author Topic: FTTC Modem Question  (Read 39685 times)

kitz

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Re: FTTC Modem Question
« Reply #135 on: April 24, 2016, 03:19:31 PM »

Thanks Dray.
I was working my way down the thread, as I wasnt around last night and have only just seen he's now on MDWS.

Really nice bit-loading graph.  SNRm continues to show excellent stability.
No CRCs and only one Err/Sec.   That line looks sweet to me.

Josh can you recall when you got interleaved?  (sorry if you did say already).
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JoshShep

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Re: FTTC Modem Question
« Reply #136 on: April 24, 2016, 08:32:12 PM »

Josh can you recall when you got interleaved?  (sorry if you did say already).

Was April 1st (April fools)?  :lol:

Had a spike of errors about an hour ago but don't think they are too much to worry about?
« Last Edit: April 24, 2016, 11:36:14 PM by burakkucat »
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JoshShep

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Re: FTTC Modem Question
« Reply #137 on: April 25, 2016, 12:30:42 AM »

Let me get this straight. The errors I don't want to be seeing as much are CRC & ES right? The others don't matter as much. So its normal to get more FEC errors on a line with interleaving as they are corrections?

burakkucat

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Re: FTTC Modem Question
« Reply #138 on: April 25, 2016, 12:48:13 AM »

Very simply --
  • FECs are CRCs that "never happened" due to the operation of the error correction mechanism.  :) 
  • CRCs and ES are bad news.  :( 
« Last Edit: April 25, 2016, 12:50:33 AM by burakkucat »
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JoshShep

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Re: FTTC Modem Question
« Reply #139 on: April 25, 2016, 01:04:06 AM »

Very simply --
  • FECs are CRCs that "never happened" due to the operation of the error correction mechanism.  :) 
  • CRCs and ES are bad news.  :( 

Thank you for that b*cat  ;D

Weaver

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Re: FTTC Modem Question
« Reply #140 on: April 25, 2016, 03:21:01 AM »

Thank you Burakkucat, that is worth knowing. Confusing and non-obvious terminology. Error present, successfully corrected / uncorrectable.
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JoshShep

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Re: FTTC Modem Question
« Reply #141 on: April 25, 2016, 12:25:43 PM »

Also has anyone successfully capped their own connection and had success with interleaving being removed? I may try this.

NewtronStar

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Re: FTTC Modem Question
« Reply #142 on: April 25, 2016, 07:12:12 PM »

Capping the line had no effect to induce fastpath on my line but had way to many errored seconds when I had finally seen what fastpath stats looked like after a DLM reset.

Your errored seconds are very low over 7 days, another stuck DLM situation  :(
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JoshShep

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Re: FTTC Modem Question
« Reply #143 on: April 25, 2016, 07:55:27 PM »

Capping the line had no effect to induce fastpath on my line but had way to many errored seconds when I had finally seen what fastpath stats looked like after a DLM reset.

Your errored seconds are very low over 7 days, another stuck DLM situation  :(

What do you reccomend I do just wait it out?

NewtronStar

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Re: FTTC Modem Question
« Reply #144 on: April 25, 2016, 08:13:38 PM »

What do you reccomend I do just wait it out?

It is now day 25 since you were interleaved and 2-3 weeks is normally when the DLM relents on such things, 95% of my time on FTTC for three years it was interleaved the only way was a DLM reset, it is all up to you on how to proceed you could wait another 2 weeks and no change or it may change tomorrow morning.
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JoshShep

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Re: FTTC Modem Question
« Reply #145 on: April 25, 2016, 08:21:26 PM »

It is now day 25 since you were interleaved and 2-3 weeks is normally when the DLM relents on such things, 95% of my time on FTTC for three years it was interleaved the only way was a DLM reset, it is all up to you on how to proceed you could wait another 2 weeks and no change or it may change tomorrow morning.

I'll wait it out until next Monday and monitor the connection a little more. If nothing has changed I'll try and get an Engineer booked. I know its going to cost me £50 though. Already been told this.

[Moderator edited to fix a broken [quote][/quote] tags pairing.]
« Last Edit: April 25, 2016, 10:47:50 PM by burakkucat »
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JoshShep

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Re: FTTC Modem Question
« Reply #146 on: April 26, 2016, 11:07:03 PM »

Can someone please have another look at my DSLWebStats please. If you think things look OK, I'm going to try and get someone in to take a look at things and possibly reset DLM. I've got a strong feeling I'm going to be exactly the same months from now.

I know I said I'll monitor the connection for another week but like NewtonStar said its already been 26 days and nothing yet.

Cheers,
Josh
« Last Edit: April 26, 2016, 11:09:23 PM by JoshShep »
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burakkucat

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Re: FTTC Modem Question
« Reply #147 on: April 26, 2016, 11:24:15 PM »

I see a 24 hours (essentially) flat line for both DS & US SNRM, a noticeable quantity of DS FECs (showing that the error correction process that is in place is working well), very few DS & US CRCs and the odd one second error per hour.

My favourites, the QLN & Hlog, are not available as MDWS does not have any data to display.

The synchronisation speeds are 79442/20000 kbps.

All in all, I would say that there is nothing to be worried about nor is there anything that needs to be done. When the synchronisation speeds are considered in Mbps (79.4/20) you are getting the top level of the service provided.

Seriously, just use the service and enjoy it!  :)
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JoshShep

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Re: FTTC Modem Question
« Reply #148 on: April 26, 2016, 11:37:34 PM »

There you go,

Thanks for looking at that for me. so the interleaving depth of 1555 on the download is something I'm just going to have to live with?

I do enjoy the connection, it's just I enjoyed it a little more before it was handicapped, it seems to me like I should be on fastpath both up and down.

Do we know anything more about G.INP on ECI cabs? Or is it just a waiting game now.

Cheers
Josh

burakkucat

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Re: FTTC Modem Question
« Reply #149 on: April 26, 2016, 11:51:45 PM »

There you go,

Ooh, they are quite nice graphs. (I'm sure konrado5 will be taking a look.)

Quote
Thanks for looking at that for me. so the interleaving depth of 1555 on the download is something I'm just going to have to live with?

It is that very same interleaving that is making the circuit so good. Remove that interleaving, reverting to a depth of one, and you'll be having no FECs but masses of CRCs, ESs and (probably) SESs.

Quote
Do we know anything more about G.INP on ECI cabs? Or is it just a waiting game now.

Ah, now I see. You would really like to have G.Inp applied to your circuit rather than the traditional interleaving. We must remember that certain circuits will respond better with interleaving and others better with the correction that G.Inp provides.

As for the situation with ECI equipped cabinets, as far as I am aware, it is still a case of just being patient.  ;) 
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