|Mar 19 22:04:10||IDS dos parser : udp flood (1 of 1) : 192.168.1.69 126.96.36.199 1018 UDP 65177->45237|
Now this tied in exactly with the time of the call dropping so it looks like Skype is triggering the udp flood detection on the router. There isn't a simple way to disable this through the web interface. So you have to telnet to the router and issue the commands:
ids config state=disabled
which disables the intrusion detection system. I'm not too worried about this as the router doesn't have any real services listening on it's WAN IP and I trust all the internal clients. Anyway, hopefully problem solved for now.