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AB-2 Abbreviations
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CMS Call Management System
CO Central Office
CPU Central Processing Unit
CSM Centralized System Management
CSSO Customer Service Support Organization
DBP Data Base Processor (Subsystem)
DBP-CPU Data Base Processor Central Processing Unit (TN509, TN549, or TN472C)
DBP Bus Data Base Processor Bus (also VME Bus)
DBPI Data Base Processor Interface (UN160B)
DBP-RAM Data Base Processor Random Access Memory (TN508 or TN532)
DC Direct Current
DCE Data Communications Equipment
DCIU Data Communications Interface Unit
DCP Digital Communications Protocol
DCS Distributed Communications System
DFC Dedicated Function Computer (also DBP-CPU)
DID Direct Inward Dialing
DIM Disk Interface Module (UN161B on AUDIX-L)
DLC Digital Line Circuit (TN754)
DMI Digital Multiplexed Interface
DOSS Delivery Operations Support System
DRAM Dynamic Random Access Memory
DS1 Digital Service 1
DSI Digital Service Interface
DSL Digital Subscriber Line
DSO Data Service Organization
DSU Data Service Unit
DTE Data Terminal Equipment
EDC Electronic Document Communications
EDI Engineering Drawing Information
EIA Electronic Industries Association
EMC Electro-Magnetic Compatibility
EMI Electro-Magnetic Interference