Ntc 360 Wk 2 Short Answers

Rotary and Dual Tone Multi-frequency (DTMF)

Rotary dial telephones generate a series of electrical pulses as the dial rotates back to its original position. These pulses are what generate what number was dialed. A touch-tone telephone generates tone signals when a person presses a button on the telephone. These tones are known as dual tone multi-frequency (DTMF).

Wide Area Telecommunications Service (WATS) and leased lines.

A Wide Area Telecommunications Service or WATS is a special direct distance dialing (toll) service whereby a subscriber installs a dedicated line arranged for either inward or outward calls or a combination of both. Its design was for bulk rate savings on long distance calls. This type of service is typically used for inbound toll-free service such as an 800 number.

A leased line or private line is any communication channel leased for exclusive use from a common carrier. Many companies used this type of line between two or more locations for dedicated interoffice communication. The key difference between the two are WATS is a specialized line set up to receive long distance communications or to allow long distance communications to an area while a leased line is a dedicated line set up between distinct locations.

Private Branch eXchange (PBX) and Centrex.

Private Branch eXchane (PBX) is a private switching system owned and operated by a business or other organization that connects multiple phone lines within an organization to one or more central offices. It provides call setup and routing within an organization, plus a host of enhanced features (Dean, 2003). A Centrex (central office exchange service) is a service from local telephone companies that does the same as PBX, but business users would not need to purchase their own facilities or equipment.

The key difference between these two technologies is that a PBX is managed by the organization so maintenance and configurations lie upon the organization. Centrex is...