3G Data Service Testing

Application service data unit

ATM data service unit

automatic data service center

B-ISDN Broadband – Integrated Service Data Network

Broad band Integrated Service Data Network (B-ISDN)

Broadband Data Service

Broadcasting Data

broadcasting data receiving card

chemical data service

connectionless broadband data service

Data Broadcasting

data broadcasting and gathering

Data Broadcasting Receiving Card

DATA SERVICE

data service command processor

data service connecting

Data Service Control

data service decoder