Hi folks, We have a TE405p which is plugged into a tigris doing drop and insert. Unfortunately we seems to be getting all sorts of plops and buzz.... Now I was thinking a doing a test of passthru and want some suggestions please... Basicallt have Asterisk forward a call (being anything from a dialup modem, isdn data or a DOV call) our a different pri port with actually terminating the call, just again doing a drop and insert. Asterisk is only passing the isdn between ports, its not doing anything else. Has anyone done this, or have any suggestions ?? Gary .