| 释义 |
keysender Teleph.|ˈkiːsɛndə(r)|
[f. key n.1 + sender.]
A device for applying electric impulses representing a telephone number to a circuit by means of a set of keys (numbered 0 to 9), in place of a dial.
1929Telegraph & Telephone Jrnl. XVI. 34/1 The light, airy switchroom, the tap-tap of the keysenders and the humming of the dials, this is my introduction into the subscriber's Paradise— an Automatic Exchange. 1934Post Office Electr. Engineers' Jrnl. XXVII. 32/1 It has recently been decided..to provide mechanical keysenders both for P.B.X. operators and, if desired, for individual telephones. 1948J. Atkinson Herbert & Procter's Telephony (new ed.) I. xi. 216/2 The keysender..is a device introduced as an alternative to the dial on large type private branch exchange switchboards to reduce the time expended by a P.B.X. operator when dialling numbers from the switchboard. By its use, the P.B.X. operator is free to attend to other calls whilst the keysender is still transmitting the digits which have been keyed up. 1970New Scientist 5 Nov. 275/1 Tests at the St Albans exchange showed that the keysender was markedly quieter than the rotary dial and saved an average of 2–3 seconds on each call.
So key-sending, the use or operation of a keysender.
1928C. W. Brown Automatic Telephony Simplified viii. 143 Key sending, and not dial sending, would, of course, be provided at manual exchanges when necessary. 1930Gloss. Terms Telegraphs & Telephones (B.S.I.) 26 Key⁓sending B-position, a B-position equipped with digit keys for the purpose of making calls direct to an automatic exchange. 1938Herbert & Procter Telephony II. ix. 393 Each manual exchange adopting direct 7-digit keysending utilizes a suitable automatic exchange as a routing centre for the whole of its indirectly routed traffic. 1950J. Atkinson Herbert & Procter's Telephony (new ed.) II. xvii. 558/2 There are three alternative arrangements of the keysending equipment. |