Kitz ADSL Broadband Information
adsl spacer  
Support this site
Home Broadband ISPs Tech Routers Wiki Forum
 
     
   Compare ISP   Rate your ISP
 
Please login or register.

Login with username, password and session length
Advanced search  

News:

Pages: [1] 2

Author Topic: ECI Cabs not all bad news.  (Read 1078 times)

atkinsong

  • Reg Member
  • ***
  • Posts: 103
ECI Cabs not all bad news.
« on: July 01, 2018, 11:10:28 AM »

Over the last 2 weeks I have been experimenting with the ability to adjust the target SNR with my Draytek2760 on my ECI Cab.

A weeks running at the standard 6db target produces the following results:-

Synch speed 46.5Mb, average daily ES 7.

A weeks running at a 5db target produces:-

sync speed 49.4Mb, average daily ES 25.

A weeks running at a 4.5db target produces:-

sync speed 51.5Mb, average daily ES 33.

So, a healthy improvement in sync with a modest increase in error rate, and I am in control of the target rather than DLM.

I have previously tried all the well recommended Broadcom based modems, resulting in a typical increase in sync of 2 to 3 Mb but with a vastly inferior error rate of over 200 es daily.
Logged
ISP:BT 80/20; Cab:ECI; Router:Draytek Vigor 2760

Ixel

  • Kitizen
  • ****
  • Posts: 1005
Re: ECI Cabs not all bad news.
« Reply #1 on: July 01, 2018, 11:20:46 AM »

I did this on one of my lines until it has unfortunately recently developed some kind of fault which isn't showing up on the remote tests. It's fine as long as you appear to have a cleanish line.
Logged

Adam86

  • Member
  • **
  • Posts: 47
Re: ECI Cabs not all bad news.
« Reply #2 on: July 01, 2018, 11:45:10 AM »

I didn't think it was possible to adjust this on VDSL?

Would one be able to do this using a HG612 connected to an ECI Cabinet then?
Logged

Ixel

  • Kitizen
  • ****
  • Posts: 1005
Re: ECI Cabs not all bad news.
« Reply #3 on: July 01, 2018, 12:37:39 PM »

I didn't think it was possible to adjust this on VDSL?

Would one be able to do this using a HG612 connected to an ECI Cabinet then?

It can't be done on modems with a Broadcom chipset, only the Lantiq/Infineon chipsets or Mediatek.
Logged

Adam86

  • Member
  • **
  • Posts: 47
Re: ECI Cabs not all bad news.
« Reply #4 on: July 01, 2018, 01:07:58 PM »

Ah, learn something new every day :-)
Logged

Weaver

  • Addicted Kitizen
  • *****
  • Posts: 5376
  • Retd sw dev; A&A; 3 ◊ 7km ADSL2; IPv6; Firebrick
Re: ECI Cabs not all bad news.
« Reply #5 on: July 04, 2018, 10:36:53 AM »

One can do such SNRM tweaking with Broadcom kit too, if using ADSL, as you probably know.

Another example of synergy between the chipsets in modems at the two ends. If I remember correctly, Kitz advised caution about this basic idea though.
Logged

j0hn

  • Kitizen
  • ****
  • Posts: 1577
Re: ECI Cabs not all bad news.
« Reply #6 on: July 04, 2018, 03:02:13 PM »

Another example of synergy between the chipsets in modems at the two ends.

I don't think it needs to be an ECI (Infineon/Lantiq) DSLAM.
The Lantiq modem chipsets can also tweak vdsl2 snr on Broadcom DSLAMs. I believe it even works with retx enabled.
Logged
BT FTTC 55/10 ECI now Huawei cab
Zyxel VMG1312-B10A bridge mode with 1508 MTU + Asus RT-AC68U running Asuswrt-Merlin

Jon21

  • Member
  • **
  • Posts: 59
Re: ECI Cabs not all bad news.
« Reply #7 on: July 10, 2018, 01:40:28 PM »

Is there a max number of errored seconds before DLM kicks in? I'm currently getting about 5.5 ES/hr, so 132 a day, which I believe is decent. This is with the standard 6db target, although it's currently sitting at 5db (although that could be anywhere between 5 and 5.9db, as the stats from the Vigor 130, only seem to give whole numbers). Tempted to lower the target SNR.
« Last Edit: July 10, 2018, 01:43:45 PM by Jon21 »
Logged

Ixel

  • Kitizen
  • ****
  • Posts: 1005
Re: ECI Cabs not all bad news.
« Reply #8 on: July 10, 2018, 03:00:38 PM »

Is there a max number of errored seconds before DLM kicks in? I'm currently getting about 5.5 ES/hr, so 132 a day, which I believe is decent. This is with the standard 6db target, although it's currently sitting at 5db (although that could be anywhere between 5 and 5.9db, as the stats from the Vigor 130, only seem to give whole numbers). Tempted to lower the target SNR.

It depends what DLM policy your connection has been setup on, this varies for some ISP's. It's either going to be 2880, 1440 or 720 ES (however using MTBE based on uptime).
Logged

Jon21

  • Member
  • **
  • Posts: 59
Re: ECI Cabs not all bad news.
« Reply #9 on: July 10, 2018, 04:09:54 PM »

Not sure, itíll be whatever A&A have set it to.
Logged

Ixel

  • Kitizen
  • ****
  • Posts: 1005
Re: ECI Cabs not all bad news.
« Reply #10 on: July 10, 2018, 04:16:08 PM »

Not sure, itíll be whatever A&A have set it to.

AAISP should be on the 'speed' policy, which is 2880 ES.
Logged

hushcoden

  • Reg Member
  • ***
  • Posts: 140
Re: ECI Cabs not all bad news.
« Reply #11 on: July 10, 2018, 06:42:07 PM »

My SNR Margin is currently 17 dB and I was thinking to lower the SNR, but will I gain anything at all considering that I am connected at 39,993/9,995 on a 40/10 line ? I am sure not, right ?
Logged

Ixel

  • Kitizen
  • ****
  • Posts: 1005
Re: ECI Cabs not all bad news.
« Reply #12 on: July 10, 2018, 06:46:11 PM »

My SNR Margin is currently 17 dB and I was thinking to lower the SNR, but will I gain anything at all considering that I am connected at 39,993/9,995 on a 40/10 line ? I am sure not, right ?

You will not gain anything by reducing or increasing the target SNRM offset with an SNRM of 17 dB and the fact you're unable to sync higher than 40 megabits due to the package speed limit. All it will do is likely adjust the attainable rate for the downstream however.
Logged

hushcoden

  • Reg Member
  • ***
  • Posts: 140
Re: ECI Cabs not all bad news.
« Reply #13 on: July 10, 2018, 06:53:42 PM »

Over the last 2 weeks I have been experimenting with the ability to adjust the target SNR with my Draytek2760 on my ECI Cab.

A weeks running at the standard 6db target produces the following results:-

Synch speed 46.5Mb, average daily ES 7.

A weeks running at a 5db target produces:-

sync speed 49.4Mb, average daily ES 25.

A weeks running at a 4.5db target produces:-

sync speed 51.5Mb, average daily ES 33.

So, a healthy improvement in sync with a modest increase in error rate, and I am in control of the target rather than DLM.

I have previously tried all the well recommended Broadcom based modems, resulting in a typical increase in sync of 2 to 3 Mb but with a vastly inferior error rate of over 200 es daily.
Sorry, but probably I am missing something: from your signature your line is a 80/20 and your actual max speed is 52Mb/s ?
Logged

atkinsong

  • Reg Member
  • ***
  • Posts: 103
Re: ECI Cabs not all bad news.
« Reply #14 on: July 10, 2018, 09:01:12 PM »

Yes, you are correct.
Logged
ISP:BT 80/20; Cab:ECI; Router:Draytek Vigor 2760
Pages: [1] 2
 

anything