Abstract: A method, a system, and a network include combining communications from a plurality of subscribers providing a full-duplex communication channel therebetween; detecting noise on the full-duplex communication channel above a predetermined threshold; and selectively enabling a special half-duplex mode on one or more of the plurality of subscribers responsive to the noise, wherein the special half-duplex mode comprises a push-to-talk mode whereby a subscriber has to enable communications via push-to-talk while communicating on the full-duplex communication channel. The method, system, and network define a special half-duplex mode whereby participants are allowed to communicate via push-to-talk, but have their associated lines suppressed to remove noise from the full-duplex communication channel.

Abstract: A telecommunications terminal (100) includes an input audio transducer (111), a receiver (101) for receiving an electrical signal representing a transmitted audio signal, a noise energy estimator (117) for estimating an audio noise energy input received by the input audio transducer and an audio enhancement means (108) for applying to the received electrical signal in a selected audio frequency band a gain which is greater than the gain applied to audio frequencies of the received electrical signal outside the selected band, the gain applied being a function of the audio noise energy input.

Abstract: A telecommunications terminal (100) includes an input audio transducer (111), a receiver (101) for receiving an electrical signal representing a transmitted audio signal, a noise energy estimator (117) for estimating an audio noise energy input received by the input audio transducer and an audio enhancement means (108) for applying to the received electrical signal in a selected audio frequency band a gain which is greater than the gain applied to audio frequencies of the received electrical signal outside the selected band, the gain applied being a function of the audio noise energy input.