Business Telephone Systems

Every business needs communication. Communication plays a vital role in the success of a business. Earlier letter correspondence was used for communication. At that time effective business letter writing was important. As technology evolves in to new telecommunication system, telephone systems play an important role in every business.

Irrespective of the business type viz, big corporate to small office home office, telephone systems are very important for communication. Earlier manual human operated private branch exchange (PBX) the calls were routed by the station user. Later electronic PBX was introduced where calls are routed automatically by electronic switching, which is called EPABX.

PBXs make connections between internal telephones of a private organization, usually a business and also connect them to the public switched telephone network (PSTN) via trunk lines. Because they incorporate telephones, fax machines, modems, and more, the general term extension is used to refer to any end point on the branch.

Initially, the primary advantage of PBXs was cost savings on internal phone calls: handling the circuit switching locally reduced charges for local phone service. As PBXs gained popularity, they started offering services that were not available in the operator network, such as hunt groups, call forwarding, and extension dialing.

Now by the advent of high-speed data communication using ADSL Internet connections at speed ranges 512kbps to 2 mbps voice communication is possible over data lines, which is digital data carrier. This is known as VoIP or Voice over Internet Protocol. They are called by different terminologies like IP telephony, Internet telephony, voice over broadband (VoBB), broadband telephony, broadband phone. Business Telephone Systems has taken a new shape with advantage of Internet.