Tee connection circuit for pcm telephone transmission systems

摘要: A pulse code modulated telephony transmission arrangement provides a facility which enables an operator to ''''tee'''' across established connection between two subscribers without breaking the and reducing quality audibility of connection. The data from is nonlinearly coded digital form each independently converted linear signals are then additionally mixed as required thereafter back original permit speak subscribers, or monitor conversation. mixing ensures both that no clicks will be heard by reduction signal level produced when made.