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Ntc360Essay Preview: Ntc360Report this essayCourse: NTC 360Use short answers to explain the difference between:Rotary and Dual Tone Multi-frequency (DTMF)Wide Area Telecommunications Service (WATS) and leased linesPrivate Branch eXchange (PBX) and CentrexThe layers of the International Standards Organization-Open Systems Interconnection (ISO-OSI) model1. Explain the difference between Rotary and Dual Tone Multi-frequency.The major difference between Rotary and.