H
ELECTRICITY
H
ELECTRICITY
H04
ELECTRIC COMMUNICATION TECHNIQUE
H04
ELECTRIC COMMUNICATION TECHNIQUE
H04M
TELEPHONIC COMMUNICATION
H04M
TELEPHONIC COMMUNICATION
15/00
Arrangements for metering, time-control or time indication; ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
15/00
Arrangements for metering, time-control or time indication; ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
H04M15/44
Augmented, consolidated or itemized billing statement or bill presentation
H04M15/44
Augmented, consolidated or itemized billing statement or bill presentation