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Prepare a 2- to 3-page paper describing the telecommunication systems used at your workplace.
Use short answers to explain the difference between:
- Rotary and Dual Tone Multi-frequency (DTMF)
- Wide Area Telecommunications Service (WATS) and leased lines
- Private Branch eXchange (PBX) and Centrex
- The layers of the International Organization for Standardization-Open Systems Interconnection (ISO-OSI) model
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