Acronym Guide - D

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DA - Destination Address

DA - Directory Assistance

DACS - Digital Access and Cross Connect System

dB - decibel

DBAS - Data Base Administration System

DBMS - Data Base Management System

DBN - Database Node

dBrnC - Decibel Reference Noise C-Message Weighting

dBrnCO - Decibel Reference Noise C-Message Weighted O

dc - direct current

DCS - Digital Cross Connect System

DD - Digital Data

DDD - Direct Distance Dialing

DDS - Digital Data System (service)

DDS - Dataphone Digital Service

DEM - Dial Equipment Minutes

DEMS - Digital Electronic Message Service

DES - Data Encryption Standard

DID - Direct Inward Dialing

DL - Digital Literacy

DLC - Digital Line Concentrator

DLC - Digital Loop Carrier

DLEC - Data Local Exchange Carrier

DLR - Design Layout Report

DMA - Data Month Adjustment

DME - Data Month Estimate

DME - Distance Measuring Equipment

DMS - Digital Multiplexed System 

DMT - Discrete Multi-Tone

DNCC - Data Network Control Center

DNIC - Data Network Identification Code

DNL - Dialed Number Line

DNPA - Digital Numbering Plan Area

DNS - Domain Name Server, Service or System

DOD - Direct Outward Dial

DOS - Denial of Service

DPA - Discount Pricing Arrangement

DRM - Digital Rights Management

DRO - Disability Rights Office of the FCC

DS - Digital Signal

DS0 - Digital Signal Level 0

DS1 - Digital Signal Level 1 (1.544 Mbps service)

DS1C - Digital Signal Level 1C

DS3 - Digital Signal Level 3

DS4 - Digital Signal Level 4

DSA - Dialing Service Assistance

DSE - Digital Switching Exchange

DSL - Digital Subscriber Line

DSLAM - Digital Subscriber Line Access Multiplexer

DSU - Digital Service Unit

DSX - Digital Signal Cross Connect (x) System

DT - Dedicated Transport

DTF - Direct Trunked Facility

DTL - Dial Tone Line

DTMF - Dual Tone Multi-Frequency

DTO - Dial Tone Office

DTT - Direct Trunked Transport

DTV - Digital Television

DWDM - Dense Wavelength Division Multiplexing