| 单词 | line switch |
| 释义 | > as lemmasline switch line switch n. Telephony Originally: any switch for connecting a subscriber's line. Now: a preselector. ΘΚΠ society > communication > telecommunication > telegraphy or telephony > telephony > telephone equipment > [noun] > exchange > exchange equipment private line1852 bank1884 call-disc1884 howler1886 trunk1889 multiple switchboard1891 rack1893 line switch1898 heat coil1900 relay rack1902 multiple1905 listening key1906 telharmonium1906 wiper1906 preselector1912 line finder1922 rank1924 routiner1928 keysender1929 uniselector1930 wiper arm1933 1898 J. Bell & S. Wilson Pract. Telephony xii. 157 Suppose No. 5 wishes to speak to No. 3, he turns the handle of the line-switch until the pointer is opposite 3, presses the ringing button, takes the receiver off the hook, and, after finishing conversation, replaces the receiver, which causes the pointer to return automatically to zero. 1909 Trans. Amer. Inst. Electr. Engineers 1908 27 509 For the benefit of those not familiar with automatic switchboards, the writer will state that each line terminates in what is generally called a line switch. 1924 H. H. Harrison Introd. Strowger Syst. Autom. Telephony i. 26 The preselector or line switch..hunts to find one of ten or more idle group selectors. 1938 C. W. Wilman Automatic Teleph. (ed. 2) iii. 20 Each subscriber's line is now connected to the wipers of a single-motion, non-numerical selector, known as a lineswitch. 1982 G. Langley Telephony's Dict. 115/1 Lineswitch, a switch in a dial office which connects a subscriber's line with the first available idle trunk in the next switching stage. < as lemmas |
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