AB-6Abbreviations

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TAC

Technical Assistance Center

TC

Tone and Clock (TN714) (also Technical Consultant)

TCM

Terminal Change Management

TD

Time Division (also Transmit Data)

TDBI

Time Division Bus Interface (TN500)

TD Bus

Time Division Bus

TE

Terminal Equipment

TMC

Technical Marketing Center

TMS

Time Multiplexed Switch

TSC

Technical Service Center

TSO

Technical Support Operations

TRACS

Translation Recovery, Additions and Conversion System

UCD

Uniform Call Distribution

UDM

Universal Data Module

UL

Underwriters Laboratories

UM

Unified Messaging

UPS

Uninterruptible Power Supply

VB

Voice Buffer (TN520)

VDN

Vector Directory Number

VMAAP

Visual Maintenance and Administration Panel

VME Bus

Versa-Module European Bus (also DBP Bus)

VMWI

Visual Message-Waiting Indicator

VPC

Voice Processor Computer (TN501B)

VPT

Voice Port (TN747B)

VSFI

Voice Store and Forward Interface (UN162)

VSP

Voice Session Processor

VSP-BI

Voice Session Processor Bus Interface (TN716B)

VSP-CPU

Voice Session Processor Central Processing Unit (TN523 or TN591)

VSP-PE

VSP Processor Element (includes BI, CPU, and RAM)

VSP-RAM

Voice Session Processor Random Access Memory (TN734)

WGS

Work Group System

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AT&T 585-300-903 manual TD Bus, VME Bus, AB-6Abbreviations