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Panel switch / Dual-tone multi-frequency signaling / Direct distance dialing / Signalling System No. 7 / Multi-frequency signaling / Single-frequency signaling / Number Five Crossbar Switching System / Rotary dial / Telephone / Telephony / Telephone exchanges / Signaling


Document Date: 2008-08-21 12:13:25

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Company

Western Electric Co. / SIGNALING SYSTEMS / Bell Telephgne Laboratories / varia- SIGNALING SYSTEMS / Bell Laboratories / HISTORICAL REVIEW / Bell Telephone Laboratories / Bell Telephone Companies / /

Country

United States / /

Facility

University of Delaware / Full duplex / Institute of Mathematical Statistics / University of California at Berkeley / Cornell University / University of Washington / Today’s communication system / mine Mll. / University of Maryland / Lehigh University / University of Michigan / Polytechnic Institute of Brooklyn / Harvard University / /

IndustryTerm

mad carrier-type transmission systems / carrier-type facilities / radar systems / earliest systems / stepby-step systems / active and timevarying networks / telephone users / intermediate operator / control switching systems / carrier systems / telephone relays / prime telephone system / basic interoffice systems / far-end equipment / customer-to-central-office systems / telephone plant / telephone lines / telephone connection / telephone station / called telephone address / customer-to-central office telephone / overseas telephone systems / electronic systems / control central office switching systems / servo-control systems / satellite office / toll applications / telephone art / telephone networlc / toll switching systems / distant trm~k relay equipment / interoffice systems / office switching systems / state devices / telephone systern / transmission systems / imaginative telephone people working / early telephone system / telephone switching systems / crossbar systems / carrier systeln techniques / dial switching systems / sender-type devices / step-by-step systems / control systems / automatic message accounting tape / multifrequeney systems / crossbar switching systems / telephone switchhook / telephone system design / local coin supervisory equipment / type systems / transmission media / telephone system / trunk equipment / mission systems / telephone address / manual telephone exchange network / /

Organization

University of Washington / University of California / School of Mathematics / Harvard University / University of Maryland / Eta / University of Michigan / Institute for Advanced Study / Society for Industrial and Applied Mathematics / Polytechnic Institute / U.R.S.I. Commission / University of Delaware / Cornell University / I.R.E. / American Mathematical Society / Cooper Union / Institute of Mathematical Statistics / Lehigh University / ded / /

Person

Y. LEE / DAVID SLEPIAN / E. FRANK A. ZUPA / IRWIN W. SANDBERG / /

Position

hod operative / announcer / ring forward / PBX operator / Professor of Electrical Engineering / mathematical consultant / General / Call Announcer / signaling engineer / terminating switchboard operator / instructor in electrical engineering / forward / /

ProgrammingLanguage

DC / /

ProvinceOrState

Maryland / Michigan / Delaware / California / /

PublishedMedium

THE BELL SYSTEM TECHNICAL JOURNAL / THE BELL SYSTEM TECItNICAL JOURNAL / /

Technology

continuously improving technology / automatic transmission / simulation / flash / PBX / /

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