Commercial bandwidth
Encyclopedia
Commercial bandwidth is a term for the regular capacity of the telephone network
required for intelligible speech. It was defined as 300 hertz
to 3,400 hertz, although the modern PSTN is theoretically capable of transmitting from 0 Hz to 7,000 Hz using ISDN.
Telephone network
A telephone network is a telecommunications network used for telephone calls between two or more parties.There are a number of different types of telephone network:...
required for intelligible speech. It was defined as 300 hertz
Hertz
The hertz is the SI unit of frequency defined as the number of cycles per second of a periodic phenomenon. One of its most common uses is the description of the sine wave, particularly those used in radio and audio applications....
to 3,400 hertz, although the modern PSTN is theoretically capable of transmitting from 0 Hz to 7,000 Hz using ISDN.