Digital Signal 0 (DS0) is a basic digital signaling rate of 64 kbit/s, corresponding to the capacity of one voice-frequency-equivalent channel. A digital system uses discrete (discontinuous values usually but not always Symbolized Numerically (hence called "digital" to represent information for In Telecommunication, signalling (UK spelling or signaling (US spelling has the following meanings The use of signals for controlling communications In telecommunications Bit rate or Data transfer rate is the average number of Bits characters or blocks per unit time passing between equipment in a data transmission A voice frequency (VF or voice band is one of the frequencies within part of the audio range that is used for the transmission of speech. Channel, in communications (sometimes called communications channel) refers to the medium used to convey Information from a
The DS0 rate forms the basis for the digital multiplex transmission hierarchy in both the European and North American systems, for both the early plesiochronous systems such as T-carrier, and for modern synchronous systems such as SDH/SONET. In Telecommunications transmission is the process of sending propagating and receiving an analogue or digital information signal over a physical point-to-point or The term Plesiochronous is derived from the Greek plesio, meaning near and chronos, time and refers to the fact that plesiochronous systems run in a state where In Telecommunications T-carrier, sometimes abbreviated as T-CXR, is the generic designator for any of several digitally multiplexed telecommunications Synchronous optical networking (SONET and Synchronous Digital Hierarchy (SDH are two closely related Multiplexing protocols for transferring multiple
The DS0 rate may support twenty 2. 4 kbit/s channels, ten 4. 8 kbit/s channels, five 9. 67 kbit/s channels, one 56 kbit/s channel, or one 64 kbit/s clear channel.
To carry a typical phone call, the audio sound is digitized at an 8 kHz sample rate using 8-bit pulse-code modulation. The hertz (symbol Hz) is a measure of Frequency, informally defined as the number of events occurring per Second. Multiple DS0s are multiplexed together on higher capacity circuits. For multiplexing in electronics and signal processing see Multiplexer. Twenty-four (24) DS0s make a DS1 signal. When carried over copper wire, this is the well-known T-carrier system, T1 (the European equivalent is an E1, containing thirty-two 64 kbit/s channels). In Telecommunications T-carrier, sometimes abbreviated as T-CXR, is the generic designator for any of several digitally multiplexed telecommunications In digital Telecommunications where a single physical wire pair can be used to carry many simultaneous voice conversations worldwide standards have been created and deployed
Note that when a T-carrier system is used, robbed bit signaling can mean that a DS0 channel carried over that system is not an error-free bit-stream. Robbed-bit signaling ( RBS) is a specific type of Channel Associated Signaling in use in North America on T1 trunks and perhaps elsewhere in the world The out-of-band signaling used in the European system avoids this. Out-of-band is a technical term with different uses in Communications and Telecommunication.
E0 (G.703) is related to DS0; audio data is sent over E0 according to G.711. G703 is a ITU-T standard for transmitting voice or data over digital carriers such as T1 and E1. G711 is an ITU-T standard for audio Companding. It is primarily used in Telephony.
References
Federal Standard 1037C, entitled Telecommunications Glossary of Telecommunication Terms is a United States Federal Standard issued by the General Services AdministrationDapyx Software network: MP3 Explorer | Ebook Manager | Zenithic