1. A system, comprising: a first communication terminal; a second communication terminal; a first database that stores user attribute information associated with a plurality of users; and a server connected to the first database that obtains an identifier of a user of the first communication terminal, retrieves user attribute information associated with the user of the first communication terminal from the first database based on the identifier of the user of the first communication terminal, and provides the user attribute information associated with the user of the first communication terminal to the second communication terminal responsive to the initiation of a communication session between the first communication terminal and the second communication terminal; wherein the second communication terminal stores the user attribute information associated with the user of the first communication terminal for use in decoding an encoded speech signal received from the first communication terminal during the communication session.