Blueworx Voice Response supports either a T1 or an E1 interface with the telephone switch. With country-specific regulations, the characteristics of the switch and the signaling protocols it uses make up the telephony environment. The telephony environment is defined to Blueworx Voice Response by a large number of system parameters. Some features of switches and protocols are optional, and your configuration must specify the features that your voice applications require. Before you start to configure your telephony environment, think about what your application needs.