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List of terms
411-2021-111 Standard 01.01 June 1996
Cell
By theoretical design, it is the geographical representation of the cellular
coverage area or service area defining both the associated size and shape.
CSM2
Cell Site Monitor 2. A unit that provides analog testing and monitoring
capabilities at the cell site.
dBm
Decibels above a milliwatt. Unit of power measurement popular in wireless
telephony, general telephony, audio, and microwave.
dBW
Decibels above a watt. Unit of measurement for radio power
DCC
Digital Color Code. An identifying code associated with the control channel of
the cellular base transmitter which is used to enhance call processing in the
cellular infrastructure.
DLR
Digital Locate Receiver. The TDMA equivalent of the Locating Channel
Receiver. See LCR.
DMS-MTX
The acronym for Nortel's family of cellular switches: Digital Multiplex Switch -
Mobile Transmission Exchange.
DPA
Dual Power Amplifier. A module which contains two discrete power amplifiers
that provide amplification of the RF signal for the two corresponding Transmit
Receive Units (TRU) on the same TRU/DPA shelf.
DRUM
DualMode Radio Unit Monitor. A test and monitor unit capable of radio
communications with any Voice Channel of the local Transmit Receive Units
(TRU) in the digital mode.
Duplexer
A device that consists of two pass or pass/reject filters configured to provide a
common output port for both transmit and receive frequencies.
DVCC
Digital Verification Color Code. The TDMA equivalent of DCC.
ES
Expanded Spectrum. The additional frequency spectrum assigned to the cellular
band. The Expanded Spectrum in the A-Band consists of the A’-Band and the A"-
Band while the B’-Band is the Expanded Spectrum for the B-Band. The
Expanded Spectrum provides a total of 416 channels to each of the two bands.