Testing telecommunications equipment

摘要: A communications system is tested to simulate a realistic conversation. first measurement device (21) makes call, through the (20) it testing, second (22), and devices (21, 22) converse using predetermined speech generated dynamically by each in response signals received from other, aspects of conversation over non-perfect link. The progress will therefore take different courses according quality link (20). For example, if an expected signal detected one transmits appropriate (21). However, corrupted, or not at all, responses (or no all) are transmitted This turn may cause repeat original signal. Because all responses, including those poor signals, predetermined, can readily determine received, because other must be limited number possible last transmission made other. perform measurements on sounds they receive monitor compute parameters describing quality.