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Old 09-12-2006, 14:59   #145
Chrysalis
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Join Date: Sep 2003
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Re: A little inside information by an Employee.

You think wimax is superior to fibre to the cabinet?

I am curious of the problems that come with wireless, I see it performing badly on lans so it would amaze me if it offered good latency and high speeds over long distances.

I am not sure if BT even care that long poor lines perform badly as long as that 25% of lines that are good perform well they can promote fast speeds.

Last sunday it seems my copper pair got swapped without warning to an inferior one making my line very bad again like it was last june, I probably now have another 3 month battle to get it swapped again.

---------- Post added at 13:59 ---------- Previous post was at 13:57 ----------

Quote:
Limitations

A commonly held misconception is that WiMAX will deliver 70 Mbit/s, over 70 miles (112.6 kilometers). Each of these is true individually, given ideal circumstances, but they are not simultaneously true. In practice this means that in Line of sight environments you could deliver symmetrical speeds of 10Mbps at 10Km but in Urban Environments it is more likely that 30% of installtions may be Non Line of sight and therefore Users may only receive 10Mbps over 2Km. WiMAX has some similarities to DSL in this respect, where one can either have high bandwidth or long reach, but not both simultaneously. The other feature to consider with WiMAX is that available bandwidth is shared between users in a given radio sector, so if there are many active users in a single sector, each will get reduced bandwidth. However, unlike SDSL where contention is very noticeable at a 5:1 ratio if you are sharing your connection with a large media firm for example WiMax does not have this problem. Typically each cell has a 100Mbps backhaul so there is is no contention here. On the radio side in practice many users will have a range of 2,4,6,8 or 10Mbps services and the bandwidth can be shared. If the network becomes busy the business model is more like GSM or UMTS than DSL in that it is easy to predict the capacity requirements as you sign more customers and additional radio cards can be added on the same sector to increase the capacity.
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