DIFF Subgroup
H04M 1/0202 Full Title
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) > Constructional features of telephone sets
Of 7 combined children, 0 exist in both systems.
7 codes are CPC-only extensions.