[asterisk-users] Echo problem with TDM440P and ADSL Line

[Marcos Lois Bermúdez]

Hello, I'm a newbie user of Asterisk, i'm sucessfully install it it's 
great but, i get some problems with echo in a adsl line.

My system is a TDM440P with 3 FXO Ports and 1 FXS.
Asterisk 1.2.13
Zaptel 1.2.11
Line 1 - Analog
Line 2 - Analog with ADSL

It's installed with two analog lines one of them have a ADSL splitter.
The location are Spain, i load the tdm driver with opermode SPAIN, i 
read that this will set the correct impedance for the line.
I compile first time zaptel with ECHO_CAN_MARK, but also i probe MARK2, 
MARK3, KB1 and ECHO_CAN_MG2, with no result for the Line that have the ADSL.

The aggresive make good with the adsl line, but get really extrange 
sounds across the conversation.

I don't know the milliwat test line here on spain to setup the gains 
correctly (If any body knowsm send it, :) ), so i call from one line to 
the anoter one with a millivat app, so i notice that when i connect a 
analog phone to the line 1 press 5 to get a clear line, and talk 
something i hear me but very very low, but when i make this on the line 
2 i hear me more high.

So i use the fxotune that come with zaptel, with no results for this 
line, so i get the lastest from CVS that comes with a patch that can 
dump the waves to see what happend, i get 1-3 % of echo on line 1, and 
arround 30-25 % on the Line 2, i read that if i have more than  10% of 
echo the soft echo canceller can't make her work due to it can't 
determine the echo signal.

So i read (all googling) that with ADSL there is a some tricky to solve, 
but no information.

It's posible to solve this problem? i suspect that i not alone with this 
conf, analog +adsl?
Any help is apreciated, i sepnt a lot of hours to solve this with no 
success.

Excuse my english.

Regards.