A business telephone system is a multiple line phone structure usually applied in various business setups. Small business phone systems are widely used to allow smooth running of many small businesses. The emergence of Internet telephony technology for example, voice over Internet Protocol (VoIP) and private branch exchange (PBX) has led to the establishment of PBX that employs Internet Protocols (IP) to support calls in small business phone systems. VoIP is supported by most modern private branch exchanges (PBXs). Nevertheless, current open source ventures together with affordable state of the art hardware are lowering the expenditure for PBX ownership. This allows small business phone systems to be of great value to most organizations.

Toll free numbers for a small business phone system is highly recommendable because it has various unique features that enable the business to operate smoothly. The features include; Voice mail and fax, this allows the business enterprise to receive voice mail and fax messages; Web call button, the business is able to receive calls directly from their web page with a simple click of a button; Virtual Card Calling, helps to dial any one of the Voice Mail access numbers and make outside calls before, during or after checking your voice mail messages; Conferencing, small business phone system permits businesses to have meeting of up to 25 participants at a given moment conveniently: Caller ID Display, small business phone system allows one to opt whether to show the incoming caller number or the business number as the identity of incoming calls; Online management, used to help the business follow up call details like history and analytical report; Scheduled Call Forwarding, the small business phone system is able to establish a program to send calls to different numbers without failure based on the different desires the business aims to achieve.