H
ELECTRICITY
H
ELECTRICITY
H04
ELECTRIC COMMUNICATION TECHNIQUE
H04
ELECTRIC COMMUNICATION TECHNIQUE
H04J
MULTIPLEX COMMUNICATION
H04J
MULTIPLEX COMMUNICATION
H04J2203/00
Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
H04J2203/00
Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07