What is carrier telephony as applied in telecommunication?
It’s a technology based on a carrier wave, or carrier is a waveform (usually sinusoidal) that is modulated (modified) to represent the information to be transmitted. This carrier wave is usually of much higher frequency than the baseband modulating signal (the signal which contains the information). Meaning that a telephone company provides a pair of wires to a user that carries -48volts@440hertz as what is called the Subscriber Loop Carrier. Through Pulse Code Modulation a persons voice is modulated into this carrier via a telephone and is transmitted to the central office at near light speed. At the Central Office the circuit is switch routed to a destination, if that destination is outside the Local Exchange Carrier (the local phone companies network) it is routed over Transport Carrier systems composed of either electrical multiplexed signals, Microwave transmission, or most likely Optical Carriers utilizing Fiber Optic cables. But the same principal applies the original signal (th
