Brief for Telephone Dialler System This is a system that allows a user to upload a series of numbers to be called by a telephone dialler system. The dialler makes an initial call to an operator number and then a second call to the client number. Both calls are initiated by a single HTTP GET request to the telephony server. The system needs to support multiple users where values in the HTTP GET request will be different depending upon the currently logged in user. The values that will...