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About kitz.co.uk info

kitz.co.uk is one of the UK's largest DSL broadband resource & information sites.

This site contains a wealth of information such as how ADSL & VDSL (fibre) broadband works.
There's tips on choosing an ISP, help comparing ISP prices and ISP performance.

A large section of the site is devoted to self help diagnostics and what to do if you run into problems with your broadband connection, such as how to get dsl line stats from your router to understanding how such things as SNR and attenuation can affect your connection. There's also a vast array of tutorials and FAQs about broadband.

It is independently run and a not for profit site.  Unlike some broadband sites, we do not focus only on ISPs which pay commission. Although the site is well known and respected within the ISP industry, our position means that we are free to tell you 'as it is' and allows us to carry information on far more ISPs than most other broadband comparison sites.

If you have a broadband problem and need some help - or just want to say hello - our community forum is frequented by many knowledgeable people, who may be able to assist you. We are a family friendly oriented site so please feel free to join us.

The site is continually expanding, with new pages being added or amended. New pages are normally announced on the Forum.


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xx G.INP/Retransmission roll-out on ECI cabinets - UPDATE 30/04/2016

April 30, 2016, 02:26:16 PM by kitz
As previously reported on kitz, we first noticed the nationwide roll out of G.INP/Retransmission to ECI cabinets on the 17th of March.

We have been closley monitoring the progress of the roll-out, but by early April it was clear all was not well and some lines were experiencing issues which resulted in a high rate of faults being reported to Openreach and at this time we announced that ECI roll-out was being suspended and retransmission was being removed from some lines.

To date circa 260k lines have had retransmission removed, but unfortunately the fault rate is still much higher level than Openreach would expect, so last week Openreach took the decision to remove G.INP/retransmission for the vast majority of lines on their ECI network.

Phase 2 roll-back commenced 27th of April and is expected to be complete by next week. Openreach are continuing to monitor fault levels and are working with their vendor to find a permanent solution.  An update is due mid May.

Roll back in itself has not been without problems and already we have noticed stable lines which have never been interleaved having interleaving and Forward Error Correction applied, which has reduced line rates considerably to less than before G.INP was applied.  Conversely some other lines which obviously need Error Protection are left experiencing extremely high rates of Errored Seconds and are on an open DLM profile.   All-in-all its not going too great right now. :(
73 comments | Write Comment

xx G.INP roll-out suspended for some ECI cabinets.

April 09, 2016, 12:47:59 PM by kitz
As already reported Openreach commenced roll-out of G.INP to their ECI estate in March 2016.

We have been following progress of the roll-out and for the vast majority of lines, this appears to have been successful with most users have seen an increase in their sync rates.
However, it became apparent a few days ago that some lines were seeing behaviour that looks suspiciously like the ECI modem - Issue 1 problem.   Affected lines are able to sync but not get a valid PPP session.   

Openreach have identified those lines which they suspect could be susceptible to this particular fault and as a precaution have suspended roll-out of g.inp for those affected lines only. 
Retransmission has also been removed from any lines which have an increased risk of developing this fault, regardless if they were affected or not.

Discussion re: Suspension of G.INP on ECI cabs for affected lines

0 comments | Write Comment

xx Openreach roll out G.INP retransmission to their ECI cabinets

March 18, 2016, 06:36:38 PM by kitz
It would appear that Openreach have now commenced rolling out G.INP retransmission to their ECI cabinets.  The first sign was on the 6th of March when one of our community members on an ECI cabinet had G.INP applied, things seemed to quieten down for a short while,  but as of the 17th of March a batch of users are reporting G.INP updates to their lines.

BT Openreach rolled out retransmission to their Huawei cabinets last year, but progress to the ECI's stalled after problems were discovered for those using modem routers with Lantiq based chipsets.  Openreach admitted at that time that their ECI/Lantiq equipment was not capable of upstream retransmission and many users were seeing a decrease in speed and increased latency.  A workaround was put in place for those users on Huawei cabinets with ECI modems, but progress for those on ECI cabinets temporarily came to a halt.

G.INP retransmission offers effective protection against Impulse Noise in order to improve line stability.  It also reduces overheads and latency when compared to traditional methods of interleaving and RS Error Correction.  The result is most users should find themselves with slightly faster connection speeds and better line stability. 

Unfortunately though, it has been noted that a few users have experienced a loss of speed of circa 2Mbps.   
It is too early yet to form anything conclusive, but we will continue to monitor and will report further when there are more users on ECI cabinets using G.INP to be able to conduct a more detailed analysis.


Links:

What is G.INP Retransmission?
Questions about Openreach implementation of G.INP
G.INP -  BT rollout 2015
ECI cabinets & G.INP discussion
0 comments | Write Comment

xx Maintenance 17/03/2016

March 16, 2016, 11:34:59 PM by kitz
The forums will be going offline shortly after midnight on Wed eve/Thurs 17th 00:01 due to maintenance.
Expected down time is around half an hour.
1 comment | Write Comment

xx TP-Link TD-W9970 - Review

March 01, 2016, 06:06:06 PM by kitz
TP-Link has recently released its TD-W9970 combined VDSL modem/router in to the UK.   
It's a low cost model which is ideal for those on a budget and retails at around 35.  Obviously for that price you arent going to get the latest spec wifi, but it does ok for wireless N.

We tested the TD-W9970 and was pleasantly surprised at what you get for your money: Read our TP-Link TD-W9970 review.

0 comments | Write Comment


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