ADSL2+
What is ADSL2+, and what are the benefits?
ADSL2+ is the next generation of ADSL (i.e. broadband over the telephone line), and it works by using additional equipment to utilise additional bandwidth in the line. ADSL2+ extends the capability of basic ADSL and has the potential to provide connection speeds as high as 24Mbps downstream and 1Mbps upstream. However, only a tiny proportion of users will ever see speeds exceeding 16Mbps, and users who live further away from the exchange and currently receive ADSL connection speeds of less than the full 8Mbps, are unlikely to see a significant speed improvement using ADSL2+. As with ADSL, the length and quality of the line will determine the actual connection speed.
ADSL2+ also increases the potential download/throughput speed to around 2400kbps or 2.4Mbps, so overall, the download/throughput speed experience should be much closer to the connection speed achieved than on ADSL services.
A key benefit of ADSL2+ is the higher upload speed, which can reach as high as 1Mbps, which is double that of previous Karoo ADSL services. This means that you'll be able to send your files and data to other internet users or to online sites much faster than previously.
ADSL2+ can also cope with more 'noise on the line', which means the stability of the connection is much better. To put it in technical terms, an ADSL2+ connection will remain stable at a lower SNR (Signal-to-Noise Ratio) than an ADSL connection.
A further benefit of ADSL2+ is the fact that it has a greater reach, so that, for the first time, customers living further from an exchange may be able to have broadband.
So, in short, the benefits of ADSL2+ are increased download and upload speeds (subject to distance from the exchange), greater line stability and extended reach.
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Signal-To-Noise Ratio (SNR) and attenuation
All ADSL connections are subject to SNR and attenuation, which determine the actual stable speed that can be achieved on your line. SNR (Signal-to-Noise Ratio) is how much signal you are receiving as opposed to noise on the line, and attenuation is how much loss of signal you have on the line. The SNR will often fluctuate at different times of the day, so it is difficult to monitor, whereas attenuation is fairly static, and depends on the actual length of your phone line between your premises and the exchange.
For SNR, higher is better (meaning not much noise on the line), but for attenuation, lower is better (meaning not much loss of signal on the line).
The SNR reduces as you connect at higher speeds and the further you live from the exchange. For a consistently reliable service, the SNR has to be above 6, and ideally above 10.
For example, if you have an SNR of 10, and you are on a 2Mbps ADSL service, you would not gain very high speeds from ADSL2+, as if you were to connect any faster, the SNR would drop to about 6, possibly causing disconnections and download speed problems. But, if you had an SNR of 30 on a 2Mbps ADSL service, you could probably receive much higher speeds with ADSL2+, which will perhaps cause the SNR to drop to about 8-10, just enough to operate reliably. However, there is no sure way to find out what your phone line will support, until a service is installed on the line.
When signing up for an ADSL2+ service, we will be determining what speed your line is capable of providing whilst remaining stable, based on your postcode area. This means that, while it may connect at a slower speed than you might like, it will help stop your connection from disconnecting due to a low SNR, giving you the benefit of a stable, always on (slightly slower) connection, rather than a (slightly faster), intermittent one.
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Is ADSL2+ available to all customers using Karoo products?
ADSL2+ technology is available on all our Karoo Lite, Mid and Pro packages. Customers on older Karoo packages can regrade to Mid or Pro for free, or to Karoo Lite for just £29.99.
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Products
Why are Karoo Lite, Mid and Pro better than Karoo Max?
For a start, Karoo Lite, Mid and Pro are based on the latest ADSL2+ technology, which has the potential of giving faster speeds (subject to line length and other factors), greater line stability, and a longer reach than the old Karoo Max products.
In addition, unlike Karoo Max, Karoo Lite, Mid and Pro are subject to very little Performance Management (or "traffic shaping"). In fact, there will be no Performance Management on the most common forms of internet traffic, such as browsing, emailing, streaming, downloading and uploading.
All in all, Karoo Lite, Mid and Pro have the potential of providing better line and throughput speeds than Karoo Max, and are much less subject to fluctuating speeds. In addition, the products are easy to choose between, with pre-set usage limits, unlike Karoo Max, so the customer knows exactly what he's getting by paying more.
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What are the advantages of switching to Karoo Lite, Mid or Pro?
There are several benefits to changing, summarised as follows:
- Our lowest prices starting from just £8.49
- Faster overall speeds and a more stable connection
- Options for extreme downloaders with unlimited downloading overnight (on Pro packages only)
- All packages come with a "Pay as You Go" option for customers who want to use the internet beyond their monthly allowance, offering complete flexibility and choice.
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Why can you not provide me with an unlimited package?
We understand that many customers enjoy the peace of mind that unlimited usage brings. However, many broadband providers who advertise 'unlimited' services actually have a Fair Usage Policy which means there are restrictions on how much you can download. Rather than advertise an unlimited service (which isn't really unlimited), we wanted to be honest and provide the actual usage allowance for all our packages up front. Karoo Pro packages each have 'true' unlimited downloads from mid-night to 8am, which means you can schedule heavy downloads during the night.
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If I am unhappy with my new package, can I change back without cost to me?
We are confident you will experience consistently improved download speeds with these new packages. However, in the rare circumstance that you might experience a downgrade in experience, of course we will switch you back to your previous package at your request.
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Hardware
I'm using a USB modem to connect to the internet. Will this still work on an ADSL2+ service?
Not all broadband hardware is ADSL2+ compliant. USB modems are not ADSL2+ compliant, nor are the earlier ADSL routers. Your hardware will still work with Karoo on ADSL2+, but will only train up to a maximum of 8Mbps (i.e. ADSL Max speeds only). If you want to take advantage of ADSL2+, the higher connections speeds and higher upload speeds and greater stability, you will need to upgrade your hardware to an ADSL2+ compatible router.
We recommend two particular routers, which have been developed with the suppliers we work with to work straight out of the box with your Karoo broadband service. We also offer free Technical Support for the routers we provide.
To order a new ADSL2+ router you can wither click here or call us on 01482 602555.
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Terms & Conditions
Why do I have to re-start my contract?
When we switch you from one package to another, there are a few things we need to do from changing information in systems to physically switching your service at the exchange with one of our engineers. To cover our costs of doing this, we kindly ask you to start a fresh contract with us. We do have some a more flexible contract option for our Karoo Mid and Pro packages which works as a rolling one month contract. This does require a one-off charge of £47 inc. VAT.
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Does a Fair Usage Policy apply?
There is no Fair Usage Policy with our Lite, Mid and Pro packages.
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Speed
What speed am I going to get?
We will provide you with an estimated connection speed for your postcode when you sign up which will be confirmed in your welcome letter. The actual speed at which you browse or watch online videos will differ across different times of the day or what website you are visiting.
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How have you calculated my speed?
The speed we quote is taken from a large cross-sample of KC lines right across the network, which is split by postcodes so we can provide you with a typical 'average' speed for your street.
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What speed information does your speed checker give me?
Our broadband speed checker will give you an indication of typical connection speed for your postcode area. This is the speed your line can achieve between your broadband router or modem and your local telephone exchange. There are a number of factors that affect your broadband speed, the length of your line being by far the most significant, but internal wiring and the use of extension cables can also affect your speed. So the further you live from the exchange, the lower your speed is likely to be. There are other broadband speed checker tools on the internet but these are likely to be checking download (or "throughput") speed, which is different (and often lower) than your connection speed, since this is affected by a number of additional factors, such as how busy the internet is.
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Will I always be able to connect at the speed you quote me?
The Karoo speed checker will provide you with a typical speed for your postcode area. This is the maximum speed at which you will be able to connect to and browse on the internet. It's important to know that connection speeds vary when more people are using the internet at the same time and depend on what website you are visiting.
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Is there a guarantee of minimum speed?
The speed you experience is affected by a number of things, so we can't guarantee a minimum or maximum speed at any given time. We understand how important a good connection speed is to you and we do everything we can to ensure traffic on our network is optimised to provide a great experience for everyone. Some of things that might impact your speed are:
- The distance you live from the telephone exchange: the closer youlive to the exchange, the faster your connection is likely to be. Like mobile phones, the further a signal has to travel, the weaker it is.
- Quality of your phone line: if your phone line's in good condition, you'll get a stronger signal.
- Wiring: once the broadband internet connection hits your house, it still needs to reach your PC. If you've got good quality wiring in your house, you'll be able to enjoy faster speeds. Try to avoid using extension cables.
- Time of day: the internet has busy periods, and traffic on our network will vary from minute to minute depending on the number of people using our network.
- Hardware: the type of modem or router you use can affect the speed you experience. In addition, you will need to be using an ADSL2+-compliant router in order to benefit from the best speeds possible.
- Microfilters / splitters: the quality of the filters you use will also affect your speed.
- Karoo Performance Management on file sharing and Usenet traffic (affecting users of this type of traffic only)
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How will traffic shaping impact my speed?
There is no Performance Management or 'Traffic Shaping' on the most popular types of internet activity. However, we do apply Performance Management for bandwidth hungry protocols such as file sharing and Usenet traffic, which, whilst used by a small minority of customers, has the ability to adversely impact the Internet experience for a large number of customers.
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Usage
How do I check my usage?
Go to www.karoo.co.uk/controlpanel, enter your Karoo username and password and click 'Check My GB Usage'. This will give you a chart of you current and previous usage periods.
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How will I know if I go over my usage allowance?
We'll email you when you are getting close to your limit but don't worry, if you want to use more, you can. Our pay-as-you-go option will kick into place which means you're never stuck without your service. For customers on Karoo Lite, additional usage is just £3 per GB pr part thereof. For other packages it's even cheaper, at just £2 per GB or part thereof.
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Karoo Max (no longer for sale)
Why do we have a Fair Usage policy?
We are committed to ensuring you receive the best broadband performance for a competitive price. To achieve this goal we provide a contended service for some of our old products like Karoo Max. This means our internet bandwidth is shared with all our customers at any one point in time. The amount that we contend will depend on whether you are a business or home customer and the type of service you buy from us. Contention is a proven method for providing fast and cost effective services and is used by nearly every broadband service provider in the UK. Unfortunately, a small number of customers use more than their "fair share" of internet bandwidth during our busiest hours, which means the service degrades by taking bandwidth away from customers who use the service fairly.
You will only be affected by the fair usage policy if you use file sharing software such as peer to peer (p2p), file transfer (ftp) or binary newsgroups (USENET) during peak periods, or if you watch several hours of online content (e.g. iPlayer / YouTube) a week.
If you exceed the fair usage limit for your package then your broadband contention will be increased and the performance of your broadband will degrade during peak hours (6pm – midnight).
How do I stop my Karoo Max service being degraded?
If you wish to use file sharing applications without being affected by the fair usage policy, simply schedule your file sharing to operate outside of peak hours (midnight until 8am is the best time).
Applicable products
The fair usage policy currently relates to the Karoo Max service only. The table below shows the number of gigabytes (GB) per month that maybe transferred during peak hours which are from 6pm until midnight every day.
| Karoo Max |
Peak limit (6pm – midnight) |
Off peak limit |
| Option 1 |
20GB |
None |
| Option 2 |
30GB |
None |
| Option 3 |
40GB |
None |
| Option 4 |
50GB |
None |
The Karoo Broadband Starter Max product is charged according to the number of gigabytes that you transfer every month and consequently a fair usage policy does not apply.
General
Why can I not pay cash?
Unfortunately, we can't accept cash payments for security reasons. But we do have a variety of flexible ways to pay to suit you. You will find these on the back of a bill or you can give us a call on 01482 602555.
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Can my email be sent to another email address other than Karoo?
Unfortunately at the moment we can only send usage to your Karoo email address, but you can set up a re-direct from Karoo to a hotmail or Gmail account. Check with your current email provider for details.
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