NSDU Network Service Data Unit

B-ISDN Broadband – Integrated Service Data Network

Broad band Integrated Service Data Network (B-ISDN)

NDU Network Data Unit

service unit network architecture

network data unit

Application service data unit

ATM data service unit

Data Service Unit

data service unit， DSU

MAC Service Data Unit MSDU

SDU Service data unit

Service Data Unit

service data unit integrity

Service Data Unit SDU

SMDA data service unit

Transport Service Data Unit

TSDU Transport Service Data Unit

XUDTS eXtended Unit Data Service