Re: How do the lowest layers of the DSL stack work?

[Stefan Bethke <stb () lassitu de>]

Am 01.07.2012 um 21:01 schrieb James Bensley:

> [15.24 Mbit/s raw bit rate compared to 8.128 Mbit/s net] is quite a drop in speed and I'm trying to understand where 
> this is happening.
...
> According to that extract, it all disappeared because of [Reed-Solomon] encoding, which is hugely vague.

http://en.wikipedia.org/wiki/Reed-Solomon_error_correction#Data_storage

The second paragraph explains that typically the raw bit rate is twice the net rate.

The raw bitstream is then encoded further as HDLC or ATM.


Stefan

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Stefan Bethke <stb () lassitu de>   Fon +49 151 14070811