Systems and methods for processing data and communicating encrypted data are provided. A method of processing data and communicating encrypted data may include receiving input traffic data at a first interface of a channel service unit/data service unit (CSU/DSU). The method may also include encrypting management data associated with the input traffic data at the CSU/DSU to produce encrypted management data. The method may further include sending the encrypted management data via a second interface of the CSU/DSU to a remote terminal of a local area network via a data router coupled to the CSU/DSU.