Hello, I have a few astersk servers, talking via SIP to an upstream provider. I decided to launch a callshop using two Atcom AG168V ATAs, each talking to a central asterisk server via IAX. Phone----ATA -----(iax)-------asterisk--------(sip)---------upstream I am using a billing system , that sits between the ATAs and the phones, and it detects call start using voltage levels (change of polarity or a 16kHz signal) geerated from the ATA devices. The billing system on its part communicates with a PC(runing the billing software) through an RS232 interface. The problem is, once I dial out the ATAs, the call is successfully put through the central asterisk server to the upstream provider, but the billing starts taxing the call as soon as a ringing sound goes back from the other end, which is before the call actually starts. Does anyone know of a possible solution, or just any suggestions? Is it something I can fix with the asterisk server or not? Thanks -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20060212/d236f2c4/attachment.htm