Managing a hosted SIP phone service and managing an on-premise PBX are two very different experiences. You can argue the pros and cons of both services. But there's a solid amount of unique advantages a hosted service holds over an on-premise solution.
Here are 6 ways managing a SIP phone service beats managing an on-premise solution.
SIP phone services are generally equipped with online Admin Portals. The Admin Portal allows you to make instant changes to users, phones, and features across your phone system. If there's ever an emergency, the Admin Portal gives you immediate access and full control over everything.
Admin Portals have intuitive interfaces that allow you to make changes at the click of a button. You can apportion features and calling privileges, setup phones automatically with IP phone booting, create/delete new users, and generate financial reporting. You can control outbound calling by setting limits or auto-refills on Public Switch Telephone Network (PSTN) minutes.
On-premise PBXes do not run on online Admin Portals. They rely on Asterisk and other less friendly interfaces that require a serious investment of labor and time. You're a busy person, and you shouldn't have to get stuck making rudimentary changes to your phone system. And then there's the maintenance issues. If something malfunctions with the UI, there's rarely a dedicated support staff to bail you out.
Many SIP phone services have consistent uptimes in excess of 99% (here, here, and here). With tens of thousands of clients, these providers dedicate significant resources to ensuring their uptime is as close to 100% as possible, 24/7. They also send timely notifications to customers when there are network issues via email or Twitter and have websites, known as "trust pages", were you can check the current network status of the phone system network. This makes it easier for you to alert your team of any potential disruptions to your phone service.
When things go wrong with an on-premise PBXes, the results can sometimes be disastrous. The entire phone system is housed within on-site servers that you're directly responsible for. If something gets seriously disrupted, your phone service could be down until a new server is purchased and installed. Your company would make zero phone calls in this timeframe, and all eyes would be on your department.