CDMA: Code Division Multiple Access - A method of digital wireless transmission that allows a large number of users to share access to a single radio channel by assigning unique code sequences to each user.
CLEC: Competitive Local Exchange Carrier
GIS: Geographical Information System
GPS: Global Positioning System
ILEC: Incumbent Local Exchange Carrier
ISP: Internet Service Provider
PBX: Private Branch Exchange
PCN: Personal Communications Network - A digital wireless radiotelephone network using low-powered, wireless telephones, data terminals and microcell base stations connected to the public network.
PCS: Personal Communications System - FCC terminology describing intelligent, digital wireless, personal two-way communications via PCN.
PTT: Post Telephone and Telegraph
RBOC: Regional Bell Operating Company
TDMA: Time Division Multiple Access - method of digital wireless transmission that allows a large number of users to share access (in a time ordered sequence) to a single radio frequency channel without interference by assigning unique time slots to each user within the channel
VPN: Virtual Private Network
WLL: Wireless Local Loop