Posts Tagged 'EFM'

BE launch 40Mb bonded DSL

With the New Year fast becoming a distant memory, there have already been some interesting developments in the broadband landscape. From my position, BE launching bonded DSL from the exchange is one of the more interesting propositions, as it further pushes the limits of copper above and beyond it’s current uses.  Current headline speeds will be up to 40Mb down and up to 5Mb up. However although similar in delivery to EFM, this will be available immediately across BE’s network of c.1250 exchanges. Currently this is in final trials, meaning commercial details and compatible CPE are still to be set in stone. However it is planned that these trials will last for up to 2 months, before they start to roll this out through all channels, including wholesale.

Of course this has many appliances, and sits neatly in the sphere between legacy SDSL connectivity and fibre leased lines. Currently many of our wholesale partners are multi-linking DSL tails and this can be seen as a direct replacment for this. Bonded DSL will also negate the need to force sessions onto a single LNS, enabling partners to efficiently operate a resilient multi-LNS environment. Combined with Seamless Rate Adaptation, Bonded DSL can now be seen to offer a true alternative to an ISDN30.

The main downside to this is that it will not be available in rural areas, thus not offering any help to users in traditional ‘not spots’ and not wholly aiding the ability to obtain the USC/O of 2Mbps stipulated by Digital Britain. Saying that, one possible application could be in instances where an end user is far away from their local exchange. Whereby with one DSL, they may only obtain a sync rate of 2Mb, they now have the possibility to double this in favourable conditions. It will be interesting to see how other carriers react to this news.

Leased line services on copper?

Over at FD Wholesale, we’ve been doing some trials in our R&D department bonding Annex M tails together and we’ve been able to get throughput normally associated with leased lines. We’re roughly 1.5Km from our local exchange, and when bonding 2 lines, the total sync rate was 26.7Mbps down and 4Mbps up. When we bonded 4 lines, we obtained 56Mbps down and 8Mbps up.

The applications for this are wide ranging. Consider having a client who lives 5Km+ from their local exchange. 1 DSL would offer them little throughput to sustain a number of users. Aggregate 2 or 3 together and suddenly they can start to look at IP applications that may improve business processes such as SIP or Video conferencing. Another example may be where a client can’t gain wayleave agreement to obtain a fibre run. In this instance, they can have a bonded Annex M service offeirng up to 80Mbps down and 10Mbps up. Obviously these are headline speeds and are dependant on quality of copper and line length, but in all but the worst circumstances, a bonded Annex M service can start to become a compelling alternative to EFM or FTTC. Using the BE network, this is also available immediately, nationwide. No waiting for 2012 to have a coverage of c.300 exchanges.

Currently this is something that all our channel partners are utilising, as it gives them a cost effective alternative to a leased line. Based on the Cisco proprietory protocol, traditionally the stumbling point has been the high initial price point associated with the routers. However, we’ve been conducting some trials with a manufacturer called Virtual Access using their GW7000 boxes, and they’ve been very successful in terms of throughput and stability. However, even more compelling is the fact that they lower the initial price point of the solution to sub £500.

Personally I feel that bonding Annex M tails, at the core is a lot more resilinet solution than trying to aggregate them at the client end, using an external aggregator, as it means that there is little overhead, lower packet loss and less latency. In my opinion, the main thing to take away from this is that even though fibre will still have it’s uses, the applications for DSL are ever increasing. Whereby traditionally a leased line was the only method available to provide large amounts of throughput, the landscape is ever changing to incorporate DSL.

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May 2017
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