Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems (1921)
Smith, Arthur Bessey, b. 1875, Campbell, Wilson Lee · New York : McGraw-Hill · leaf 210
attendant can answer by thelistening key, release the incoming selector and connector, with therelease in key, and dial up another local station by the CD. in keyand the calling device. In this case the P.A.X. station will be rungperiodically automatically. But after this second party has… … Ckt. RA.X.-3Wire-2Wcuj Trk-Sel.System connection from toll to P. A. X PrlV. {Facing Page 190) vwi/-i r/inr.is Mam Exchange r J ^w jfp* 3r|:!i^j- I Oper.Trk.
Telephone
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
