Brazil (Brasil) ACImpedance

[bsdaiwa]

Can anyone tell me what the ACImpedance setting for a POTS line in Brazil (Brasil) would be? I am getting an echo on my OBi 200 OBiline POTS connection and I read that adjusting the ACImpedance would correct it.
Thanks

[drgeoff]

http://www.3amsystems.com/World_Tone_Database/Compliance_data

Says 600 for Brasil. (Same as US and OBi default.)

[bsdaiwa]

Thanks drgeoff, do you or anyone else have any ideas on how to eliminate the echo?