What are these settings in Huawei modems

[Ricky]

I wonder wht these settings are meant for .. ?

*www.imagetor.com/out.php/t9439_whatarethseinadsl.jpg

I know most of the settings in but have never touched these EC mode or FDM mode and BitSwap enabling or disabling

 

[Ricky]

Com'n .. anyone !

 

[morpheusv6]

What is your model no?
Mine is MT880 and I have no such settings.

 

[Ricky]

Its MT841 and you can find settings under Adavnce --> ADSL -->