Assessing the number and quality of features available can also staggering. We assumed you'll want the basics of call forwarding, voice mail boxes, and a standard menu that lets customers select where they want to direct their calls. But consider other features, like applications that will allow portability from business to cell phone, features that will translate voicemail to text or email, call recording, fax services, and even features that will work with Google documents, Salesforce, or your office software. How much of these additional features does your company really need, and how much are they worth to you?
CallHippo is one of the small business phone service providers with a distinct international focus. It calls itself an “Intelligent Virtual Phone System.” CallHippo does a great job of telling you what you as the user can accomplish with its system (as opposed to simply telling what its technology is or does). Even its live chat starts by saying “Hey, how about setting up your phone system in less than 3 minutes?” Feature We Like: Focuses on workflow, highlighting the third party apps it integrates with. It sees phone as part of a continuum of customer processes in your company.

Website: https://business.comcast.com/help-and-support/voice/phone-business-class-voice-mail-overview
We find that most small businesses get the most value from SIP Trunking for some of the following reasons. Offers the potential for immediate cost savings on business applications by allowing companies to consolidate technologies into Unified Communications. Provides failover to employee mobile devices if data connectivity is lost. Can provide extreme flexibility in pricing by allowing businesses to purchase add-on features and "lines" (call appearances on a SIP trunk) as they need them.