I overheard some wireless operators the other day talking about “25 Mbps duplex” and aligning it with superfast NGA when they didn’t mean that at all. What they really meant was “12.5 Mbps in both directions added together to make 25 Mbps”  which is some way off being NGA, and does nothing to help the wireless industries case for being included in the EU’s NGA definition (only fibre-based fixed-line services count at the moment). Wireless duplex often mean aggregate bandwidth and doesn’t tell customers what the download speed is.

I keep hearing this dubious use of language but exclusively from wireless operators and its at best very misleading.

If they are right, then I need to tell Intel to stop referring to my gigabit Ethernet card in my PC as 1000baseT and to start calling it 2000baseT.

And while they’re at it, Be There have wrongly sold me my 9 Mbps ADSL2 connection – its really 10 Mbps as I also get 1 Mbps back up to the Internet.

Assuming they are not wrong, and they aren’t, then I respectfully ask wireless ISP’s to stop doing it.

While its true techologies such as 802.11a refer to total bandwidth, that allows professional operators to shape their packages to suit their customers – define a suitable up and down package that works for their customers.

Duplex in a telecoms context simply means a system able to communicate in both directions at the same time – it does not give you the liberty to add the two directions together and pretend its a useful number for your customers to know.

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