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Operator assistance refers to service provided by a telephone operator to the calling party of a telephone call. This can include telephone calls made from pay phones, calls placed station-to-station, person-to-person, or collect, third-number calls, calls billed to credit cards, and certain international calls which cannot be dialed directly.
Excel was founded in 1988 by Dallas entrepreneur Kenny Troutt and Steve Smith, as a long-distance reseller in the US telecom sector at the birth of telecom deregulation. In the mid-1980s, Smith developed an interest in the network marketing business model. He recognized the marketing and compensation strategy was suited for the marketing and ...
Mobile phone tracking is a process for identifying the location of a mobile phone, whether stationary or moving. Localization may be affected by a number of technologies, such as the multilateration of radio signals between (several) cell towers of the network and the phone or by simply using GNSS. To locate a mobile phone using multilateration ...
Excel mobile phones. The Excel/Excell marketed a range of mobile phones developed by the British company Technophone in the 1980s. These mobile phones were advertised as the smallest, lightest most intelligent mobile phones in the world at that time, and were the first to fit in a pocket. While larger than later mobile telephones at 7 inches ...
Communication in small groups consists of three or more people who share a common goal and communicate collectively to achieve it. [1] During small group communication, interdependent participants analyze data, evaluate the nature of the problem (s), decide and provide a possible solution or procedure. Additionally, small group communication ...
A busy signal (or busy tone or engaged tone) in telephony is an audible call-progress tone or audible signal to the calling party that indicates failure to complete the requested connection of that particular telephone call . The busy signal has become less common in the past few decades due to the prevalence of call waiting and voicemail .
v. t. e. A cellular network or mobile network is a telecommunications network where the link to and from end nodes is wireless and the network is distributed over land areas called cells, each served by at least one fixed-location transceiver (typically three cell sites or base transceiver stations ). These base stations provide the cell with ...
Each group is named by Small Groups library as G o i, where o is the order of the group, and i is the index used to label the group within that order. Common group names: Z n: the cyclic group of order n (the notation C n is also used; it is isomorphic to the additive group of Z/nZ) Dih n: the dihedral group of order 2n (often the notation D n ...