Abstract: Apparatus is provided that includes at least one entity for transmitting speech signals in a discontinuous transmission mode including transmitting speech frames interspersed with frames including comfort noise parameters during periods of speech pauses. The entit(ies) include a first entity for estimating a current noise value. In addition, the apparatus includes a second entity for selectively controlling a rate at which the frames including comfort noise parameters are transmitted during the periods of speech pauses based upon the estimated current noise value.

Abstract: A general purpose computer test interface is used to test various types of computers having differing input/output characteristics. The interface comprises a control unit which is responsive to messages from a controlling host computer to generate a unique set of type control signals for each computer type to be tested. Interfce control logic circuits combine the type control signals with bus control signals from a target computer under test to adapt the interface for communication with each of the different types of targets defined by the type control signals.