6. "Hi, this is [your name]. I'm either on a call or away from my desk. Please leave your name, number, and a brief message and I'll get back to you. Thank you."
Because they're working across such a broad array of features and channels, many of today's phone systems are adopting the moniker of Unified Communications-as-a-Service (UCaaS). These are generally cloud-based, virtual PBXes (private branch exchanges) that include at least one (usually multiple) software clients to enhance their functionality on the web, desktop, and especially mobile devices. Even residential VoIP systems come with features that are simply impossible with a conventional telephone system.

For at least the next two years, these trends are likely to become important selling points in most VoIP vendor-customer pitches. While that's great, be sure to fully understand what's being offered and how the vendor is going to go about delivering it. Is a 5G implementation truly standards-based or are there still some proprietary hardware or software components? Have much will any new security measures affect overall voice performance, and does the vendor fully support the changing security requirements in important industry regulations, like HIPAA and SOX?
The positive thing about Grasshopper pricing is that there are no additional costs for new users. As your team expands, your Grasshopper virtual phone bill will remain the same.