ISDN & SIP sound problem


I try to setup an asterisk 1.6.2 on debian squeeze (using debian’s package) with a B410 BRI card and some SIP account.

All work fine for local call using SIP accounts with ST2030 phones (good voice quality & co), so, while i try to make an outbound call (or receive call) using the B410 (with Dahdi), people can heard me so i can’t heard them, i receive no sound.

I found on some forum that the “group” settings on chan_dahdi.cond and dahdi_channels.conf can cause this problem, so, using the same group on all span don’t resolve my problem.

This is my /etc/dahdi/system.conf:
This is my /etc/asterisk/chan_dahdi.conf:
This is my /etc/asterisk/dahdi-channels.conf:

This is the cli:

Do you have an idea about what can cause this problem?