What do u mean by ATM switch?

What do you mean by a switch in ATM in which the data travels to a switch and returns back to data?

ATM switches are high-speed packet switches designed to process and forward ATM cells. ATM is an internationally standardized connection-oriented packet switching protocol designed to support a wide variety of data, voice, and video services in public and private broadband networks. ATM networks consist of ATM switches, which are interconnected by high-speed transmission links. ATM switches are high-speed packet switches specialized to process and forward ATM cells (packets). As ATM is a connection-oriented protocol, ATM switches must establish a virtual connection from one of its input ports to an output port before forwarding incoming ATM cells along that virtual connection.