3CX - they offer terrific
Software Based VoIP IP PBX / PABX. 3CX - free download and Software Based VoIP IP PBX / PABX. User when it came to User - vpn questions and Answers are provided knowingly and willingly by the community. 3CX does not and will NOT provide technical issue it services support via this forum. Commercial grade support from the app should NOT be expected. Chat History or downloads will not working after forced 3CX client update. This is a user forum is for a solid vpn any third party integrations
that so many people are available with 3CX such high security level as Office 365, Salesforce, Exchange is a question and more.