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H.100 (computer Telephony)
H.100 and H.110 are legacy telephony equipment standard published by the ECTF that allow the transport of up to 4096 simplex channels of voice or data on one connector or ribbon cable. H.100 is implemented using Multi-Channeled Buffered Serial Ports (McBSP), typically included as a DSP peripheral. McBSP, also known as TDM Serial ports are special serial ports that support multiple channels by using Time-division multiplexing (TDM).Faranak Nekoogar, 'From ASIC to SOC: a practical approach', Prentice Hall, 2003 The McBSP / TDM Serial Port Interface is as follow: * CK: Clock * FS: Frame Sync * DR: Data Receive * DX: Data Transmit See also * Time-division multiple access * TDM Bus A TDM bus is one application of the principle of Time-Division Multiplexing. In a TDM Bus, data or information arriving from an input line is put onto specific timeslots on a high-speed bus, where a recipient would listen to the bus and pick out on ... External links * References {{DEFAULTSORT:H.100 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ECTF
ECTF (the Enterprise Computer Telephony Forum) was formed in 1995 by telephony equipment and software suppliers to improve the interoperability of various vendors’ CT solutions. Until ECTF was formed, the computer telephony industry was an alphabet soup of competing software and hardware platforms. ECTF has sought to improve this situation, and to enhance the “scalability” of CT standards so that telephony systems serving the needs of small businesses as well as large, multinational corporations can be built using the same technology.Michael Thomas Bayer, "Computer telephony demystified: putting CTI, media services, and IP", McGraw-Hill Professional, 2001, It consists of many working groups on different areas (e.g. Speech Recognition, etc.). Standards * H.100 — a standard published by the CompTIA ECTF for communication between PCI PCI may refer to: Business and economics * Payment card industry, businesses associated with debit, credit, and other payment cards ** Pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Signal Processing
Digital signal processing (DSP) is the use of digital processing, such as by computers or more specialized digital signal processors, to perform a wide variety of signal processing operations. The digital signals processed in this manner are a sequence of numbers that represent samples of a continuous variable in a domain such as time, space, or frequency. In digital electronics, a digital signal is represented as a pulse train, which is typically generated by the switching of a transistor. Digital signal processing and analog signal processing are subfields of signal processing. DSP applications include audio and speech processing, sonar, radar and other sensor array processing, spectral density estimation, statistical signal processing, digital image processing, data compression, video coding, audio coding, image compression, signal processing for telecommunications, control systems, biomedical engineering, and seismology, among others. DSP can involve linear or nonli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time-division Multiplexing
Time-division multiplexing (TDM) is a method of transmitting and receiving independent signals over a common signal path by means of synchronized switches at each end of the transmission line so that each signal appears on the line only a fraction of time in an alternating pattern. This method transmits two or more digital signals or analog signals over a common channel. It can be used when the bit rate of the transmission medium exceeds that of the signal to be transmitted. This form of signal multiplexing was developed in telecommunications for telegraphy systems in the late 19th century, but found its most common application in digital telephony in the second half of the 20th century. History Time-division multiplexing was first developed for applications in telegraphy to route multiple transmissions simultaneously over a single transmission line. In the 1870s, Émile Baudot developed a time-multiplexing system of multiple Hughes telegraph machines. In 1944, the Britis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time-division Multiple Access
Time-division multiple access (TDMA) is a channel access method for shared-medium networks. It allows several users to share the same frequency channel by dividing the signal into different time slots. The users transmit in rapid succession, one after the other, each using its own time slot. This allows multiple stations to share the same transmission medium (e.g. radio frequency channel) while using only a part of its channel capacity. Dynamic TDMA is a TDMA variant that dynamically reserves a variable number of time slots in each frame to variable bit-rate data streams, based on the traffic demand of each data stream. TDMA is used in the digital 2G cellular systems such as Global System for Mobile Communications (GSM), IS-136, Personal Digital Cellular (PDC) and iDEN, and in the Digital Enhanced Cordless Telecommunications (DECT) standard for portable phones. TDMA was first used in satellite communication systems by Western Union in its Westar 3 communications satellite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TDM Bus
A TDM bus is one application of the principle of Time-Division Multiplexing. In a TDM Bus, data or information arriving from an input line is put onto specific timeslots on a high-speed bus, where a recipient would listen to the bus and pick out only the signals for a certain timeslot. It resembles the TDM carried out in synchronous optical networking, but the "TDM Bus" term is more commonly used when the bus is inside a single unit like a telecommunications switch or a PC. A specification for putting a TDM bus on PCI hardware has been published as H.100/H.110 by the Enterprise Computer Telephony Forum (ECTF). last accessed 2007-02-04] These are not related to the |
