For those looking for more advanced features than Zendesk Voice, onSIP offers a hosted PBX solution without the clunkiness of requiring your own PBX hardware or extension license fees. With services available such as auto-attendants, groups, directories, drag-and-drop transfers of calls, click to call, Outlook integration, voicemail recordings forwarded to email, and the ability to have up to 10 phones ring simultaneously when an extension is called, OnSIP is definitely an alternative available to our customers as well. Subscriptions and are charged on a pay-as-you-go basis. And it’s compliant with most SIP desk phones, software phones and mobile apps and requires minimal configuration efforts to get you connected.
How to install
Check out the setup instructions available here.