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Oi Fixo (landline service, formerly Telefone Telemar) Oi Móvel (mobile service, cornerstone of the Oi brand) Oi Velox (ADSL, 3G formerly Velox) Oi Internet (ISP) 31 (long-distance and international calling) Oi Wi-Fi (Wi-Fi access, at home or via hotspots) Oi TV (DTH pay TV) Oi Voip (Voice over IP) In 2010, Portugal Telecom acquired 22.4% of Oi ...
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The PDU is passed to layer N−1, where it is known as the service data unit (SDU). At layer N−1 the SDU is concatenated with a header, a footer, or both, producing a layer N−1 PDU. It is then passed to layer N−2. The process continues until reaching the lowermost level, from which the data is transmitted to the receiving device.
Oi / ɔɪ / is an interjection used in various varieties of the English language, particularly Australian English, British English, Indian English, Irish English, New Zealand English, and South African English, as well as non-English languages such as Chinese, Tagalog, Tamil, Hindi/Urdu, Italian, Japanese, and Portuguese to get the attention of another person or to express surprise or disapproval.