You must shop for business phone systems with an idea about the various kinds of products available and their features. Do you understand how a VoIP system differs from a KSU phone system? You must understand these different types, or else you might find yourself overwhelmed by all the different acronyms.
Key Services Unit
In the more traditional office phone systems, a KSU is usually used for companies having about 5 to 40 workers. A KSU system allows standard telephones to handle various lines at the same time and make phone calls to other extensions in the area. KSU-less phone systems are more affordable for employers having fewer than 10 workers. These telephones have the technology, and the system will not be wired permanently.
Private Branch Exchange
This phone system fits companies with more than 40 workers, or those that require more customizable and advanced options. Unlike the bulky ones of the past, the newer PBX systems can easily fit on a desk or shelf. PBX and KSU systems have technical differences, but in essence, the physical system resides somewhere on-site. These two options need professional setting up, configuration, maintenance, and usually, the existing telephone wiring will be sufficient. Both systems require a conventional landline connection with a local telephone company. PBX systems are provided as part of a unified communications system which may include features such as fax services, video chat and instant messaging.
On-Site or Cloud-Based VoIP
Organizations conducting business through VoIP can utilize a hosted system, relying on the offsite hardware and the cloud, or can have the equipment on-site (such as a PBX). On-premise VoIP enables a greater degree of control, but it comes with increased installation expenses, and the likelihood that maintenance expenses will go up. The trade-off is you will be able to control most of what happens, although for this, you will have to invest in trained IT people.
Hosted VoIP services cost less at the start, with lower maintenance expenses but a higher possibility of increased per-month costs. The telephone company does every upgrade to the system, but this means you are responsible for what happens with the business phone.
Your internet provider or service will affect the quality of VoIP phone service. Seamless service needs a considerable bandwidth, and access is spotty in some areas. If an outage occurs, your VoIP provider will scramble to route phone calls through a different place where there is clear service.