Was going to try Skype again. I probably should use my Asterisk PBX. When I click [Skype], it does attempt to dial. I did have to allow synapse.exe access to Skype (which I did). But it seems their "updates" might block the Calling features of the API ? The [FAQs] link in Skype directs me to https://support.skype.com/en/faq/FA...nges-to-skype-impact-my-3rd-party-application Note: Calls seem to work if I use the Desktop Skype directly. Graham, are you still using Skype ? Note: closing this closes synapse.exe.