/// <reference types="node" />
import { URL } from "url";
import { IvrNumber } from "../configuration/call/IvrNumber";
export interface AudioPlaybackCall {
    type: "audio-playback";
    call: Buffer;
}
export interface TelephonyCall {
    type: "telephony";
    call: IvrNumber;
}
export declare type RequestedCall = AudioPlaybackCall | TelephonyCall;
export interface Caller<T> {
    call(call: T, streamUrl: URL | string): Promise<RequestedCall>;
}