/// <reference types="node" />
import ws from "ws";
import { Emitter } from "../Emitter";
export interface CallClosedEvent {
    by: "caller" | "ivr-tester" | "unknown";
    reason?: string;
}
export declare type CallEvents = {
    callClosed: CallClosedEvent;
};
/**
 * Represents an active call
 */
export interface Call extends Emitter<CallEvents> {
    /**
     * Sends DTMF tone to the call
     */
    sendDtmfTone(dtmfSequence: string): void;
    /**
     * Sends 8 bit PCM encoded (MULAW) at 8000 Hertz media to call
     */
    sendMedia(buffer: Buffer): void;
    getStream(): ws;
    close(reason: string): void;
    isOpen(): boolean;
}