Just to confirm that the number port was successful. I did have to alter the configuration on the Grandstream HT812 ATA to have it use the Stun server given that the HUB2 uses NAT. Outgoing calls worked straight away, incoming calls did not ring nor generate ringtone. After adding the Stun server all seems to be working. I guess using Stun has avoided me having to set-up the firewall that A&A think to be the better approach.
That's a wrap!
