techleigh: Well the international calls seem to be OK after turning off the SIP ALG but now I am getting complaints about people calling us on local calls and then there is no one there (but apparently they can hear us but we can't hear them).
Was not sure how to "port forward" the PAP2T from the router. Would this necessarily help in this case or is there something else going on.
PAP2T seems to get the IP address that the router decides but how to set up a static IP for the PAP2T.
Do you do this in the GUI on the router (TP Link TD-W8960N)??
Any help appreciated.
Despite the calls being cheaper my wife just wants everything to work like it used to so if I can achieve this then it's a win-win situation
Set a static ip address, in the same subnet mask but outside of the DHCP range on the pap2t (so if you have network of 192.168.1.0/24 with the DHCP range 192.168.1.10 - 192.168.1.200 then you could set your PAP2T to use an IP of 192.168.1.201 for example.
in the TP-Link router, find the current dhcp assigned ip address of the PAP2T and add a DHCP reservation for that mac address, so it always gets the IP address. Either way the PAP2T will always have the same internal LAN IP which is important for Port Forwarding.
Follow this link It shows how to port forward port 5060 (SIP) you will also need to add a port forward range of 10000- 20000 UDP for RTP (this is the audio/voice data itself). So where it shows the Name2 rule (using 6060) ignore that instead make the rule this:
External Port Start: 10000
External Port End: 20000
Internal Port Start: 10000
Internal Port End: 20000
Protocol: UDP (though TCP/UDP is fine)