Patent ID: 7900750

Claim:
Method for modernizing at least one elevator group, which elevator group comprises a plurality of elevators, a group control that controls the elevator group as well as call-giving appliances connected to the group control via the landing appliance bus, each call-giving appliance comprising one or more call pushbuttons, wherein the method comprises the phases: a new group control, new call-giving appliances on the floor levels and also a new landing call bus for connecting the aforementioned new call-giving appliances to the new group control are installed; a new group control is connected to the pushbutton interface of the old call-giving appliances for transmitting calls from the new group control to the old group control; one or more elevators of the elevator group are modernized; the elevator calls given by passengers are received from the new call-giving appliances; the calls given are divided between the modernized subgroup and at least one unmodernized subgroup on the basis of the selection criterion given, and the calls addressed in the new group control to the modernized elevators are allocated to the modernized subgroup; the calls addressed to the unmodernized subgroup are allocated via the aforementioned pushbutton interface to the group control of the unmodernized group control.