| 单词 | engaged signal |
| 释义 | > as lemmasengaged signal 3. Telephony. Of a number or line: in use and therefore unavailable to a second caller; of a person: telephoning. Hence engaged signal, engaged-test, engaged-tone. ΘΚΠ society > communication > telecommunication > telegraphy or telephony > telephony > [adjective] > status of line private1852 busy1883 engaged1891 secure1961 scrambled1962 1891 J. Poole Pract. Telephone Handbk. viii. 151 (heading) Engaged test. 1891 J. Poole Pract. Telephone Handbk. viii. 153 If she then hears a click in her receiver, she knows that the number is engaged. 1891 J. Poole Pract. Telephone Handbk. viii. 154 If a subscriber's line is engaged. 1893 W. H. Preece & A. J. Stubbs Man. Telephony xvi. 271 (heading) Switch with distinct ‘engaged signal’ circuit. 1921 G. B. Shaw Back to Methuselah iii. 137 Engaged! Who is she calling up now? 1927 Electr. Communication VI. i. 14/2 If the busy signal is heard in the receiver..then the called subscriber is engaged. 1935 G. Greene Eng. made Me i. 17 I hoped it was the engaged tone, but I knew it was the ringing tone. < as lemmas |
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