A traditional Business Telephone System is a setup that helps you connect your telephone line junction to the Public Telephone Network or commonly known as Public Branch Exchange (PBX) Also, it works in your internal systems of network. All the lines are connected to each other with an extension and a number attached to it. The two common types of Business Telephone Systems are Traditional line of Service and Voice over Internet Protocol Service. Traditional line of service connects the whole office phone lines to a central hub. Even though all the phones are connected but this type of service limits down the features as compared to a VoIP service when it comes to communication. A typical VoIP uses the TCP/IP connection server to establish a two-way communication between a sender and a receiver.

Companies using Business Telephone systems connects their lines to each other through the local area network (LAN) provided by their company. Since the area distance in a building office is very short in distance, there is rarely any issues with dropping of the signals. For any smaller working space, a building, LAN is best suitable for their work needs. Moreover, the additional costs attached to VoIP are much lesser in IP-PBX telephone exchange system. In some advanced telephonic features, the user of that handset is usually informed through e-mail if he/she has any pending voice messages. Installing and moving them is also one lesser hassle to worry about. To further save costs on VoIP through PBX system, SIP trunking, attached to the area of that specific building, could be put to use.

Common beneficial features of any PBX system include:

• Placing a call in or out of the specified area
• Message recording/voice mail
• Multiple lines in one set
• Conference call bridge between Floors
• Office Connectivity among divisions
• Transfer of call to Specialized Personnel

The above-mentioned features make sure that you don’t miss out on any necessary business calls. Moreover, the call region spreads out internationally, as well. Some of the companies providing PBX telephone systems are Avaya, Panasonic, Cisco, Grandstream and Nec. The sizes of one telephone could also be varied. And the features are mostly varied with their sizes. A common IP-PBX device can hold minimum two and maximum eight lines. These are attached to different desks and departments. Panasonic PABX Systems Series has gone as far as to make wireless mobile systems which are easily carried and are easily connected to the Laptops and handheld smartphones devices.
Lastly, PBX can also work as a hosted PBX System. Whenever a customer calls in your office, that call is hosted by different departments so the call is not missed and the customer credibility is not lost.
For any call center, a traditional PBX telephone system works ideally. And for midsize businesses, the work hierarchy is divided through constant connection between the chain of command.

An effectively established communicating organization produces efficiently with cost saving benefit.