RDSR Receive Data Service Request

TDSR Transmitter Data Service Request

service request block

3G Data Service Testing

Application service data unit

ATM data service unit

automatic data service center

B-ISDN Broadband – Integrated Service Data Network

BLOCK DATA

block data compression

block data retrieval

Block data serial communication

block data structure

block data subprogram

Broad band Integrated Service Data Network (B-ISDN)

Broadband Data Service

chemical data service

compatible data block

connectionless broadband data service