Hello everybody, I'm aware that I can try to balance gain levels with PSTN cards using the ztmonitor tool, as described in http://www.asteriskdocs.org/modules/tinycontent/content/docbook/current/docs-html/x1695.html (Adjusting the rxgain/txgain Settings). Is there a similar tool for mISDN? If not, what is your approach to gain setting in mISDN? Thanks in advance, -- Dr. Andrea Spadaccini Multimedia Technologies Institute - MTI S.r.l. Web: www.x-voice.it - Tel: +39 (0) 95 7224945