1. A voice server, comprising a processor configured to perform operations including: authenticating a user based on a voice exemplar received by the voice server, wherein the voice server is in direct communication with an access device associated with the user; receiving voice inputs from the access device, converting the voice inputs into a user request, and sending the user request to a protocol server among a plurality of protocol servers, wherein each of the protocol servers is configured to communicate with a transaction server which is in direct communication with a plurality of legacy systems, the transaction server is configured to receive the user request and provide responsive information from the plurality of legacy systems based on the user request, each of the protocol servers includes an application programming interface server, and the transaction server includes an application programming interface client configured to communicate with each application programming interface server, providing a menu of operations associated with the plurality of legacy systems to the access device; and receiving the responsive information and formatting the responsive information into an output for the access device, including choosing from among a plurality of output formats comprising speech synthesized data and text data, wherein if the user request is a data-intensive request, the responsive information is not output via speech synthesized data, and wherein the data-intensive request comprises a request for service order details to be retrieved from the plurality of legacy systems.
5. The voice server of claim 1 , wherein the processor is further configured to convert text to speech.