Hi, The last post on this topic seems to be http://lists.digium.com/pipermail/asterisk-users/2003-June/013324.html EuroISDN seems to be supported by Asterisk http://www.asterisk.org/index.php?menu=features Regarding Asterisk support for QSIG, could someone please supply answers to the following. - What is the ESTI ISDN spec., for basic call control, that Asterisk confirms to (ETS 300 102-1, EN 300 403-1, or some other). - QSIG, basic call control, is specified in ECMA 143. Is there any difference between the ESTI and ECMA messages and procedures as far as basic call control is concerned? Best Regards, Ahmed N Tariq RADIOFRAME NETWORKS www.radioframenetworks.com