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Callbacks are sent from the server side to the client side on a callback connection which is the reverse of the usual client to server connection. That is, a client invoker on the server side communicates with a server invoker on the client side (in the case of push callbacks - again, see Section Callbacks). When a callback connection is created, all of the configuration information passed to the server side Connector is passed on to the server side callback client invoker. It follows that callback client invokers are configured by way of the server side Connector.