Prepare a 2- to 3-page paper describing the telecommunicationsystems used at your workplace.
Use short answers to explain the difference between:
Post to the Assignments forum in APA format (150 Points) Include at least one reference and 2-3 page (minimum of 700 words).
? 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