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About info 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 Main Site Maintenance 20/10/2016 - Overnight down time from 12.30 am

October 20, 2016, 12:27:10 AM by kitz
Parts of the main site will be inaccessible during the early hours of Thurs 20th October. 
The ISP section is most likely to be affected and as will any pages that hook into any of the ISP databases. 
This includes the ISP rating system,  Broadband prices & Products and any ISP information.
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xx G.INP/Retransmission roll-out on ECI cabinets - UPDATE 02/09/2016

September 02, 2016, 02:13:30 PM by kitz
For those who have been following progress of Openreach's roll-out of G.INP on ECI cabinets, it would appear that Openreach and ECI have (finally) identified the cause of the problem and fixes are in development.

The fixes include the need for updated firmware for certain Modem Chipsets which impact both the Openreach Modem and the modem component of certain CP wires only Routers as well as software update for the ECI equipment.
This software will be tested by Openreach during Q3 (Oct-Dec) with deployment likely to commence, in consultation with the Service Provider community around April 2017

From an earlier update the symptoms were loss of PPP and intermittent sync problems.  We have long suspected that the problem was modem specific - those using BCM based modems appeared to show no symptoms and G.INP retransmission worked well for the the majority of lines we were able to monitor on MDWS.

Unfortunately line monitoring is severely restricted for ECI modems and the Homehub5A, but we had noticed that the Fritz!box 7490 was affected which supposedly contains a Lantiq VRX208 chipset to the ECI modem and HH5A which contain Lantiq VRX268 chipsets and were the main modems that had issues with G.INP on the Huawei cabinets. Some older Draytek modems (2850 and 2750) also had problems obtaining a connection on both Huawei and ECI cabinets.
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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. :(
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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

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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.


What is G.INP Retransmission?
Questions about Openreach implementation of G.INP
G.INP -  BT rollout 2015
ECI cabinets & G.INP discussion
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If you wish to contact me regarding the site, you can do so at:


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