可以使用Amazon Connect Streams API发送按键输入。以下是使用JavaScript发送数字1的示例代码：

connect.core.initCCP(containerDiv, {
    ccpUrl: "",
    loginPopup: true,
    // Add an event listener to monitor the agent's state
    ccpLoadFlow: function(event) {
        // Add a listener for the `fullAgentLayout` event
        event.detail.core.agent.addListener("fullAgentLayout", function(agent) {
            // Get the agent's softphone object
            var softphone = agent.getSoftphone();
            // Use the `sendDigits` function to send the digit `1`
            softphone.sendDigits("1");
        });
    }
});