The previous article has explained general idea in choosing the right VoIP service. You can get more information to choose the right VoIP service in this article. Getting VoIP service for your business can cost you nothing or you need to pay significant up-front cost. It depends on the size of your company and the infrastructure which you already have in place. 
 
For your information, home broadband connection even offers the ability to handle some VoIP calls simultaneously. However, it is necessary for you to leave bandwidth available for other applications. To operate VoIP, you need to have broadband connection. The more simultaneous users you have, the more bandwidth you need. It will not be a problem if you are working alone at your home office or you only have a few employees. For example, operating RingCentral’s Connection Capacity usage displays that 15-mps home Comcast connection is able to handle 11 calls simultaneously although users have Netflix, Spotify and instant messaging client operating on the network at the same time.
It is also necessary for you to ensure that your internal network such as routers and switches has the ability to handle the load. Most providers recommend users to use router with configurable Quality of Service settings and choosing VoIP traffic high priority to optimize quality. If your internet service provider has bandwidth in place, you should consider this aspect. There are many VoIP service providers which are using high quality G.711 codec for VoIP communications. It will take 64 kb of data every second you talk. In fact, there is a large number of people should be able to chat it up on VoIP without worrying on hitting bandwidth caps. However, you should close on your data usage to avoid exceeding the cap.
If you subscribe to cloud-based hosted VoIP service, you need to ensure that your phones can communicate over VoIP. Most VoIP systems are using session-initiations protocol technology to assign each phone or VoIP software client a specific address. PBX routes will call to specific lines. You will need SIP-enabled phone to make VoIP calls. If you want to keep your old analog touch-tone phones or fax machines, you are able to plug them into an analog telephone adapter or ATA but they will not be able to use many advanced features which are provided by SIP-based VoIP phones.