H04M 1/54 Arrangements wherein a dial or the like generates identifying signals, e.g. in party-line systems
Introduced: September 1968
Full Title
Full titles differ between systems:
Substation equipment, e.g. for use by subscribers > Devices for calling a subscriber > Generation of additional signals, e.g. additional pulses > Arrangements wherein a dial or the like generates identifying signals, e.g. in party-line systems
Substation equipment, e.g. for use by subscribers (subscriber services or facilities provided at exchanges H04M3/00; prepayment telephone coin boxes H04M17/00; current supply arrangements H04M19/08) > Devices for calling a subscriber (H04M1/66 takes precedence) > Generation of additional signals, e.g. additional pulses > Arrangements wherein a dial or the like generates identifying signals, e.g. in party-line systems
No child classifications to compare. This is a leaf node in both IPC and CPC.