For small business firms looking for a telephone system with extension facility within their office, full-service small business PBX phone systems are the ideal choice. PBX (Private Branch Exchange) is actually a private telephone exchange within your office which offers the functionality of a regular public telecom exchange. It interconnects all the internal telephones of a business firm, along with connecting them to the Public Switched Telephone Network (PSTN). The main commercial benefit of this facility is that it eliminates the cost involved in taking individual phone connections for all employees. All calls made within the office are managed by the private bank exchange and hence free from regular telephone charges. The features vary according to the manufacturer and most telephones given by PBX companies have user friendly LCD displays through which the user can get detailed information of the calls coming to the phone. Common features of these systems include auto dialing, call forwarding, call routing, call transferring, call waiting, direct inward dialing, conference call, music on hold, welcome message, night service etc, all of which can add value to the services provided by your small business firm. The extension dialing facility provided by full-service small business PBX phone systems is helpful for your customers to reach the exact customer service person without redialing, thereby saving money and time.These value-added phone systems also aim at eliminating the hassles involved in managing multiple telephone calls simultaneously. They are capable of automatically processing all routing operations relating to telephone calls in an effective and faster manner. So small business firms can concentrate on their core services and need not worry about managing the complex telephone network. The advantage here is that as your business firm grows, the system automatically handles the additional traffic, without requiring huge investments.As a number of manufacturers are offering PBX with varying capacities and functionalities, almost all small business firms can find one suited to their firm’s traffic requirements. Some of the well known providers include Siemens, NEC and Avaya. With the advancements in information technology, PBX phone systems have entered the next level with Digital PBX VoIP IP phone systems which are software based. The technology is completely making use of the computer network in your firm and costs only a fraction of a traditional PBX phone system.