Hi all, I?m using a AVM Fritz! Card (TE-Mode) and a Longshine LCS-8051 with HFC-S-Chip (NT-Mode) together with the chan_misdn. I build the system like it was explained at http://isdn.jolly.de <http://isdn.jolly.de/> . At first I used the pbx4linux software from jolly (http://isdn.jolly.de <http://isdn.jolly.de/> ) and then I changed to asterisk. Both systems works fine, but I have (in both systems) the same echo problem. When I call a person (ISDN to ISDN), I have an echo, and the other person has no echo! But when I call to a cell phone (ISDN to GSM), I don?t have an echo! So this works fine. How can I get rid of this echo? Maybe I have to buy another card? Or is there something wrong with the mISDN drivers? Regards, Christian -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20040803/ccad8a87/attachment.htm