[23 articles. See below, The No. 4 ESS Switch and the Digital Signal Processor (DSP)]. - [FIRST TECHNICAL DESCRIPTION OF THE NO. 4 ESS. [4ESS SWITCH]]

New York, American Telephone and Telegraph Company, 1981. 8vo. Original full green cloth. Volume 60, 1981 of "The Bell System Technical Journal". Library stamp to front free end-paper. Minor bumping to extremities. A part from a very few pencil marks, a nice and clean copy. [4ESS:] Pp. 1041-1224. [DSP:] Pp. 1431-1698 [Entire issue: Pp. 785-1709]. First edition of the first publications of two fundamental topics within the history of Bell Technical Journal (AT&T): The No. 4 ESS switch and the Digital Signal Processor (DSP). It was first put into use in Chicago, Illinois to replace the 4a crossbar switch. The last new 4ESS switch was set up in Atlanta in 1999 and is planned to be in operation until 2015. The great advantage with the 4ESS was its flexibility and speed. The pioneering Digital Signal Processor, DSP1 was invented by Bell Labs in the period 1977-78 with first samples tested in May 1979. The DSP1 was a key component in AT&T's 5ESS switch. DSP capability has since been implemented in every generation of the ESS-switches. Articles about the No. 4 ESS: 1. Martersteck, K.E. No. 4 ESS: Prologue. Pp. 1041-1048.2 Frank, R.J." Keevers, R.J. Strebendt, F.B. Waninski, J.E. No. 4 ESS: Mass Announcement Capability. Pp. 1049-1081.3. Anderson, T.W. Bobsin, J.H. Cook, R.F. Gingerich, L. Marouf, M.A. Milczarek, R.J. No. 4 ESS: Mass Announcement Subsystem. Pp. 1083-1108.4. Metz, R. Reible, E.L. Winchell, D.F. No. 4 ESS: Network Clock Synchronization. 1109-1129. 5. Hoppner, K.M. Mann, H. Panyko, S.F. VanZweden, J. No. 4 ESS: Digital Interface. Pp. 1131-1166.6. Carestia, P.D. Hudson, F.S. No. 4 ESS: Evolution of Software Structure. Pp. 1167-1201.7. Davis, E.A. Giloth, P.K. No. 4 ESS: Performance Objectives and Service Experience. Pp. 1203-1224.Articles about the DSP-1.8. Boddie, J.R.Digital Signal Processor: Overview: The Device, Support Facilities, and Applications. Pp. 1431-1439.9. Barber, F.E. Bartoli, T.J. Freyman, R.L. Grant, J.A. Kane, J. Kershaw, R.N. Digital Signal Processor: An Overview of the Silicon Very- Large-Scale-Integration Implementation. Pp. 1441-1447.10. Boddie, J.R. Daryanani, G.T. Eldumiati, I.I. Gadenz, R.N. Thompson, J.S. Walters, S.M. Digital Signal Processor: Architecture and Performance. Pp. 1449-1462.11. Eldumiati, I.I. Gadenz, R.N. Digital Signal Processor: Logic and Fault Simulations. Pp. 1463-1473.12. Aagesen, J. Digital Signal Processor: Software Simulator. Pp. 1475-1481.13. Semmelman, C.L. Digital Signal Processor: Design of the Assembler. Pp. 1483-1497.14. Angelo, E.J. Jr.Digital Signal Processor: A Tutorial Introduction to Digital Filtering. Pp. 1499-1546.15. Boddie, J.R. Johnston, J.D. McGonegal, C.A. Upton, J.W. Berkley, D.A. Crochiere, R.E. Flanagan, J.L. Digital Signal Processor: Adaptive Differential Pulse-Code-Modulation Coding. Pp. 1547-1561.16. McGonegal, C.A. Berkley, D.A. Jayant, N.S. Digital Signal Processor: Private Communications. Pp. 1563-1572.17. Boddie, J.R. Sachs, N. Tow, J.Digital Signal Processor: Receiver for Touch-Tone Service. Pp. 1573-1583.18. Blake, R.B. Bolling, A.C. Farah, R.L. Digital Signal Processor: Voice-Frequency Transmission Treatment for Special-Service Telephone Circuits. Pp. 1585-1619.19. Buric, M.R. Kohut, J. Olive, J.P. Digital Signal Processor: Speech Synthesis. Pp. 1621-1631.20. Crochiere, R.E.Digital Signal Processor: Sub-band Coding. Pp. 1633-1653.21. Favin, D.L. Digital Signal Processor: Tone Generation. Pp. 1655-1671.22. Favin, D.L. Yorkgitis, D.P. Cordray, S. Digital Signal Processor: Power Measurements. Pp. 1673-1685.23. Gadenz, R.N. Digital Signal Processor: Tone Detection for CCITT No. 5 Transceiver. Pp. 1687-1698.…