- 産業: Telecommunications
- Number of terms: 29235
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ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry.
A unit used to express ratios, such as gain, loss, and relative values. Note 1: The neper is analogous to the decibel, except that the Naperian base 2. 718281828. . . Is used in computing the ratio in nepers. Note 2: The value in nepers, Np, is given by Np = ln (x1/x2,) where x1 and x2 are the values of interest, and ln is the natural logarithm, i.e., logarithm to the base e. Note 3: One neper (Np) = 8. 686 dB, where 8. 686 = 20/ (ln 10. ) Note 4: The neper is often used to express voltage and current ratios, whereas the decibel is usually used to express power ratios. Note 5: Like the dB, the Np is a dimensionless unit. Note 6: The ITU recognizes both units.
Industry:Telecommunications
A unit used to express the linear bit density of data in storage. Note: The abbreviation "bpi" is not in accordance with international standards, and is therefore deprecated.
Industry:Telecommunications
A unit used to express the number of bits passing a designated point per second. Note 1: For example, for two-condition serial transmission in a single channel in which each significant condition represents a bit, i.e., a 0 or a 1, the bit rate in bits per second and the baud have the same numerical value only if each bit occurs in a unit interval. In this case, the data signaling rate in bits per second is 1/T, where T is the unit interval. Note 2: The abbreviation "bps" is not in accordance with international standards, and is therefore deprecated.
Industry:Telecommunications
A unit used to measure communications traffic. Note 1: A call-second is equivalent to 1 call 1 second long. Note 2: One user making two 75-second calls is equivalent to two users each making one 75-second call. Each case produces 150 call-seconds of traffic. Note 3: The CCS, equivalent to 100 call-seconds, is often used. Note 4: 3600 call-seconds = 36 CCS = 1 call-hour. Note 5: 3600 call-seconds per hour = 36 CCS per hour = 1 call-hour per hour = 1 erlang = 1 traffic unit.
Industry:Telecommunications
A unit used to measure communications traffic. Note 1: A call-second is equivalent to 1 call 1 second long. Note 2: One user making two 75-second calls is equivalent to two users each making one 75-second call. Each case produces 150 call-seconds of traffic. Note 3: The CCS, equivalent to 100 call-seconds, is often used. Note 4: 3600 call-seconds = 36 CCS = 1 call-hour. Note 5: 3600 call-seconds per hour = 36 CCS per hour = 1 call-hour per hour = 1 erlang = 1 traffic unit.
Industry:Telecommunications
A universal personal telecommunications (UPT) call type that permits a UPT user to make calls from any terminal on any network, and have access to his/her subscribed services limited only by the serving and/or assisting network's capabilities.
Industry:Telecommunications
A UPT (Universal Personal Telecommunications) call type which permits a UPT user to have calls to his/her UPT number routed to the terminal specified by the user.
Industry:Telecommunications
A URL that leads to no existing document. Note: An attempt to use a dead link usually results in a "404 Error" message. Dead links are usually the result of a machine name change, changes in server accounts, or network-connection failures.
Industry:Telecommunications
A user access line normally used for analog voice communication, but which has special conditioning for use as a digital transmission circuit.
Industry:Telecommunications
A user instrument, e.g., telephone set or terminal, with a distinct call number designation, connected to a local loop, used for originating calls, and on which incoming calls from the exchange are answered.
Industry:Telecommunications
