call waiting
121Mark Jenkins — Call Waiting Installation issue de la série Embed …
122Liste der Telekommunikationsstandards — Liste von Standards und Richtlinien aus der Telekommunikation. Inhaltsverzeichnis 1 ETSI 1.1 Nomenklatur 1.1.1 derzeit gültige Nomenklatur 1.1.2 vorherige Nomenklatur …
123Caller ID — (caller identification, CID), also called calling line identification (CLID) or calling number identification (CNID) or Calling Line Identification Presentation (CLIP), is a telephone service, available in analog and digital phone systems and… …
124Feature interaction problem — Feature interaction is a phenomenon that occurs when functionality of a system (typically consisting of hardware or software) is added or removed. The term feature is used to denote an abstract unit of functionality that a system provides, and… …
125Comparison of VoIP software — VoIP software is used to conduct telephone like voice conversations across Internet Protocol (IP) based networks. VoIP stands for Voice over IP . For residential markets, VoIP phone service is often cheaper than traditional public switched… …
126North American Numbering Plan — NANPA redirects here. For other uses, see Nanpa (disambiguation). This article is about the numbering plan. For a list of area codes under the plan, see List of North American Numbering Plan area codes. The North American Numbering Plan (NANP) is …
127Queueing theory — is the mathematical study of waiting lines (or s ). The theory enables mathematical analysis of several related processes, including arriving at the (back of the) queue, waiting in the queue (essentially a storage process), and being served by… …
128H.450 — refers to a set of standards created by the International Telecommunications Union (ITU) to define several Supplementary Services of the packet based telecommunication protocol known as H.323. It parallels another set of standards known as QSIG… …
