That's what I thought. So, given that I get an appropriate FXO PCI card, should Asterisk be able to send the FSK data on through? Or would that be a big *should* ? Thanks, Nathan --- Shane Young <voiptandem at shaneyoung.com> wrote: > The 3810 can SEND callerid on FXS ports. > > The 3810 ports I have can not receive callerid. >