Method, device, and system for establishing cascade of multipoint control servers

A method for establishing a cascade of a plurality of multipoint control servers, the method comprising:

• allocating, by a management platform, a first multipoint control server of the plurality of multipoint control servers to a first conference according to conference information of the first conference carried in a call from any site, wherein the conference information of the first conference comprises a conference access number of the first conference and a site number comprised in the first conference and wherein the site number comprised in the first conference comprises a conference access number of a second conference;
• receiving, by the management platform, a request for calling the second conference from the first multipoint control server, wherein the request for calling the second conference carries conference information of the second conference;
• allocating, by the management platform, a second multipoint control server of the plurality of multipoint control servers to the second conference according to the conference information of the second conference, wherein the conference information of the second conference comprises the conference access number of the second conference and a site number comprised in the second conference;
• and establishing, by the management platform, a cascading channel between the first multipoint control server and second multipoint control server.