Call One's Public Branch Exchange (PBX) service offers cost-effective phone line connections with all the features your business needs. PBX provides reliable connections and unmatched clarity while receiving Call One's personalized Client Care Support Team.
A PBX is a hardware system that handles routing and switching of calls between a business location and the telephone network. The name originates from the way they interact with the PSTN (Public Switched Telephone Network). "Private" refers to the fact that they are separate from the PSTN, even though they connect to it. "Branch" describes how a PBX fits into a PSTN: the main communication circuits are called trunk lines, and end points that connect to it and handle smaller amounts of traffic are called branches. "Exchange" refers to the fact that connections are exchanged through a switching system, allowing larger numbers of calls to be routed through a limited number of lines.
It handles the same functions as old-fashioned telephone operators, who once sat at large manual circuit boards, spoke with each caller to learn whom they were trying to reach, and manually plugged wires into connectors to complete calls. Modern systems are automated, incredibly speedy, and do a great deal more than any manual operator.
A PBX also provides sophisticated calling features such as call waiting, auto-attendants, music/message on hold functions, and voice mail. Advanced features such as find-me-follow-me, very useful for companies with highly mobile employees or sales forces, are also provided through a PBX.
No, the two are actually quite different. A key system is typically useful only for small businesses, with limited numbers of users (typically less than 50). A key system has telephones that have multiple buttons ("keys") with lights that indicate which lines are in use, like you might expect to see on a receptionist’s desk. It is limited in function and feature set. Unlike users on a PBX, users on a key system typically do not have an assigned extension or Direct Inward Dial Number (DID) that rings only on their phone. In fact, a common key system configuration is to setup incoming calls to "Ring All" (i.e., all incoming calls ring on all phones). It is also less common for key system users to have a private voicemail box.
There are four main types of business PBX systems, distinguished by location and operation. A PBX may be located on the premises of the business or off-site at a PBX management office. They either operate by Internet protocol (IP) or by older technologies, such as analog or digital phone lines.