Voip ports question

Hi


I have an asg 120 and i've noticed peculiar packet drop with our Voip phones

basicly the firewall live view goes something like this


10.10.10.voip (we have several phones):51366 (ports range from49572:52910 udp) -> 10.10.10.1:2000 (the gateway)



they repeat over and over and over


my questions are:

1) any idea what this could be the phones work perfectly
2) how would i make a firewall rule to just allow them to do whatever they want


I've tried

internal -> port range -> internal but that didnt seem to work


thanks so much

Robert