H
ELECTRICITY
H
ELECTRICITY
H04
ELECTRIC COMMUNICATION TECHNIQUE
H04
ELECTRIC COMMUNICATION TECHNIQUE
H04L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L12/00
Data switching networks
H04L12/00
Data switching networks
H04L12/02
Details
H04L12/02
Details
H04L12/16
Arrangements for providing special services to substations
H04L12/16
Arrangements for providing special services to substations