There are three major types of phone system available: KSU-Less phones, Key systems and Private Branch Exchange (PBX) systems. Which type of phone system you choose will depend on amount of extensions you require and features your telephone system needs to have installed.
KSU-Less systems are usually more suited to companies that typically have less than ten employees, or require less than ten extensions. That isn’t to say that all companies requiring less than ten phone extensions can make do with a KSU-Less system. It may be that you require more features which are only available through either a PBX or Key phone system.
Requiring a far lower initial investment than other types of business phone systems, KSU-Less phones are specifically designed to include many of features usually only available through implementation of a full small business phone system.
KSU-Less systems can be easily unplugged and relocated, because they are not permanently wired into your office. This portability allows you to treat a KSU-Less phone system, much same as any business machine, rather than a lost permanent investment.
You will need to ensure that any KSU-Less system you choose is compatible not only with type of wiring you have in your office, but also with any accessories you may already have, such as: headsets, answering & fax machines and modems. Because KSU-Less phone systems are relatively inexpensive, they are not usually sold, installed, or maintained by telecoms vendors.
All of this means, you have to go out there and do not only shopping yourself but, also installation and support. This is one of two major drawbacks of KSU-Less systems. The last thing any business needs is to be concerned with reliability and maintenance of its phone system. Another drawback of KSU-Less systems is that they are more prone to something known as “crosstalk”. This is where separate conversations may blend into each other. With PBX, Key systems and Hybrid systems falling in price, it sometimes makes more sense to invest in a full business phone system, rather than become susceptible to risks of a KSU-Less system.