I'm trying to use Express Talk in combination with our Asterisk server (which is linked to Cisco routers with DSPs and SIP support). This works well except for the fact that the softphone doesn't seem to be aware that the line has been disconnected at the other end (this works fine with hardphones) and that there's an annoying voice delay in one direction (only when our Cisco routers used for SIP termination are involved - SIP to SIP is no proble). I don't have this problem when using a hardphone. Anybody any suggestion ?
