does your ADSL modem support BIT SWAPPING and/or INTERLEAVING

[techead]

very informative article here on ADSL technology and overcoming common issues

http://www.kitz.co.uk/adsl/adsl_technology.htm

I wonder how many of us knew about bit swapping and interleaving

both are functionality that might be in your router, but you not using it? Or maybe you dont have it at all. as we know, we need all the help we can get with a stable internet connection these days.

read up on it, might help you

 

[UnUnOctium]

Well, I'm pretty sure a few (and I mean single digits) fellow forumites know about this. 'Bit swapping' is more correctly called Adaptive Coding and Modulation in the signal processing field and interleaving is a technique used to mitigate burst errors (as well as decrease matrix rank of the codewords).

I'm sure that 99.9% of ADSL modems used today support ACM and interleaving (as this is defined in the G.992 standards) and probably the 0.1% that do not are archaic, prototype versions.

If you're more curious on 'bit swapping' read up on ACM as well as waterfilling power allocation for OFDM systems (this is the optimal way that power is assigned to the bins).

 

[Anthro]

I would be quite interested to know if you can modify the filter range on a POTS filter, ie. only allow the 138+Khz frequencies through...

 

[UnUnOctium]

I would be quite interested to know if you can modify the filter range on a POTS filter, ie. only allow the 138+Khz frequencies through...

Most DSL filters are simple RLC low-pass filters. You can easily modify the bandwidth by just swapping the components to different values. You will however do more harm than good.