s Circuits To Connect Your Telephone System (PBX or Key System) To The Local And Long Distance Companies T-1 Circuit Applications for PBXs = The Telecom Handbook THE TELECOM HANDBOOK Other Types of Telecommunications Circuits (not typically connected to the PBX) Chapter 11 - Transmission Transmission Medium Synchronous and Asynchronous Transmission Modems Multiplexers CSU/DSU Hardware More Transmission Hardware Bandwidth Simplex VS. Duplex Protocols Analog VS. Digital 2-Wire VS. 4-Wire Chapter 12 - Cable Unshielded Twisted Pair Copper Cable The Concept of Speed or Bandwidth UTP Configurations Jacks Power at the Desk Main and Intermediate Distribution Frames Shielded Twisted Pair Screened Twisted Pair Cable Grounding Advantages and Disadvantages of Twisted Pair Copper Cabling Coaxial Cable Fiber Optic Cable Purchasing Cabling and its Installation Building Cabling Systems Cabling Standards The Telecom Handbook xi THE TELECOM HANDBOOK PART IV Telecommunications Industry Chapter 13 - Understanding the Telecommunications Industry Telecommunications Network Services (Outside Lines And Calls) Telecommunications Systems (Equipment) Software And Service Companies Professional Services Outsourcing Resources - Who To Call Chapter 14 - Historical Perspective on The United States Telecommunications Industry Telecommunications Industry History: A Personal Perspective From The Author INDEX xii to The Telecom Handbook Thanks For Your Help Everyone To Harry Newton - founder of Telecom Books and author of Newton's Telecom Dictionary. Harry developed the idea for this book in 1994. He realized the need for a basic book on telecommunications, particularly for people in the computer industries. The book was originally titled "Telephony for Computer Professionals." Harry continues to be an inspira- tion to me and to many others in our industry. To Frank Brogan and Matt Kelsey of CMP for their encourage- ment and patience. To John Jainschigg, editor of Communications Convergence magazine, for sharing his insights on the future for the 