Frisco has installed talk-back loudspeakers, intercom and pneumatic tube systems in Birmingham, Ala, freight yard, which is also used by Illinois Central and Central of Georgia; tube system transmits switch lists and messages between yard office and yardmaster's office in tower; about 1500 inbound, and 1500 outbound cars are handled through yard daily.
Talk-backs improve operations
Ry Signaling Communications
Railway Signaling and Communications ; 47 , n 6
1954
3 pages
Aufsatz (Zeitschrift)
Englisch
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New three-track interchange includes interlocking and talk-backs
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