Characterised by transmission of electromagnetic waves other than radio waves, e.g. infrared waves

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) > Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection > Cordless telephones (user interfaces specially adapted therefor H04M1/724) > Characterised by transmission of electromagnetic waves other than radio waves, e.g. infrared waves