How do the lowest layers of the DSL stack work?

Mon Jul 2 11:25:43 UTC 2012

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

-- 
Stefan Bethke <stb at lassitu.de>   Fon +49 151 14070811