No title
CCITT
BLUE BOOK,VOLUME VI,FASCICLE VI.11: DIGITAL SUBSCRIBER SIGNALLING SYSTEM NO 1 (DSS1),NETWORK LAYER,US - GENEVA ITU 1989 - 435
SC-021
ERNET
335
BLUE BOOK,VOLUME VI,FASCICLE VI.11: DIGITAL SUBSCRIBER SIGNALLING SYSTEM NO 1 (DSS1),NETWORK LAYER,US - GENEVA ITU 1989 - 435
SC-021
ERNET
335