Chapter 2. Telephone Systems, Peripherals and Cabling
In this chapter...
Telephone Systems— PBXs, Centrex and Key Systems
Add-on Peripherals for Key Systems, PBXs and Centrex Systems
ACDs—Specialized Equipment to Handle Large Volumes of Calls
Media: Wireless, Fiber and Unshielded Twisted Pair Copper
The market for on-site telephone systems such as private branch exchanges (PBXs), key systems and voice mail is highly competitive. Margins are low and growth is slow.
PBXs, Centrex and key systems provide:
Connections to the public network and to staff at other sites
The means for on-site personnel to call each other without paying telephone company usage fees
The difference between PBXs and Centrex is in the location and ownership of the equipment ...
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