Outbound automated phone systems work by accepting bulk input of telephone numbers, usually from a computer drive or database. Using a bank of telephone lines, the systems place calls and listen for answers; when the systems detect a human answer, they either play a pre-recorded message or connect the dialed party with an available human agent. Inbound systems work like outbound systems, but in reverse. These systems, typically operated by computers, answer incoming calls. The systems typically play a message, then ask the caller to either press a button or speak a response. Depending on the caller’s input, the automated phone system may play some information, route the caller to another prompt or connect the caller with a human operator.