Be, the provider of 22Mbps ADSL2+ in the UK have announced that they have been running trials of 'Annex M' which boost the upstream speed of ADSL2+ to 2.5Mbps. 'Annex M' is an extension to the G.992.5 ITU-T International Telecommunications standard and enables the higher upstream speeds by increasing the frequency range available to the upstream path of the connection.
Be have confirmed that the average upstream speed their users have seen is 1.9Mbps, an improvement on their current offering of 1.3Mbps, and a vast jump up from the standard 256Kbps of the BT Wholesale based products. The BT MaxDSL products due to roll out on all exchanges on the 31st of March also see improvements on the upstream speeds (up to 750Kbps), but are limited by being based on the original ADSL standard rather than the newer ADSL2 or ADSL2+.
Be are planning to enable 'Annex M' on their Office based products upon completion of the trial, and hope this will bring some competition to the current SDSL products on the market which offer identical downstream and upstream speeds (typically up to 2Mbps), and come at a much higher price. Be services are currently available mainly in the London/Greater London area, but are expanding to other areas with Birmingham and Manchester to go live in April. A full exchange list can be found here.
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