I have 3cx running on my laptop just to test. I have a network that i have some Linksys SPa942's attached. I can get them registered on the PBX no problem. However the moment i hit any number and press dial i get the call ended tone. I cannot even dial other extensions. Router/Firewall is forwarding ports fine to laptop. SIP provider is Gradwell. I dont know if there are multiple issues (likely) or just the one of the phone extensions not being configured correctly. Anyone have any suggestions as to what I can try?