Digital Advanced Mobile Phone Service.  Standard of mobile system that has a digital control channel and uses microcells.
Standard of digital mobile system that operates in the 1700-1800 MHz frequency range.  Uses TDMA/FDM multiple access method and allows for 374 channels (8 users per channel).
Digital Enhanced Cordless Telecommunications.  Standard of digital mobile system that operates in the 1880-1900 MHz frequency range.  TDMA/FDM multiple access method.  10 channels.  Is a cordless PBX system where speech traffic is encrypted.
A signal that has a limited number of discrete states prior to transmission.  It may be contrasted to an analog signal which varies in a continuous manner and may be said to have an infinite number of states.
A mode of transmission in which all information to be transmitted is first converted to digital form and then transmitted as a serial stream of pulses.  Any signal -- voice, data, television -- can be converted to digital form.
The radio channel frequency that is used for transmission from the Radio Base Station to the Mobile Station
A Mobile Station that operates in two modes of transmission.  For example from the analog to digital mode of transmission.
Duplex distance is the difference between the uplink and downlink frequencies of a radio channel.