AT&T No. 5 Crossbar Switching System (5XB)

(last updated: 16-May-2015 09:31)
 

Books

  1. EOBS: pgs 243-245.
     
  2. EOBS2: pgs 399, 406-408, 448-450, 451-452, 454, 455, 456, 461, 463.

Periodical Articles

  1. "No. 5 - The Post-War Crossbar", BLR 27:3 Mar 1949 pgs 85-88.
     
  2. No. 5 Crossbar (book), Bell Telephone Laboratories, a reprint of articles on No. 5 Crossbar from BLR Aug 1949 (27:8) thru Sep 1951 (29:9), plus "No. 5 Crossbar - Introduction" (excerpted from paper by F.A. Korn and J.G. Ferguson in Electrical Engineering, August 1950, pgs 679- ), plus "A Pictorial Summary".
     
  3. "Alarm System for No. 5 Crossbar", BLR 27:8 Aug 1949 pgs 294-298.
     
  4. "Interoffice Transfer of Alarms in No. 5 Crossbar", BLR 27:9 Sep 1949 pgs 322-326.
     
  5. "Trunking Plan for No. 5 Crossbar", BLR 27:10 Oct 1949 pgs 360-365.
     
  6. "Senders for No. 5 Crossbar", BLR 27:11 Nov 1949 pgs 385-389.
     
  7. "Register and Sender Frames in No. 5 Crossbar", BLR 27:12 Dec 1949 pgs 426-431.
     
  8. "The Originating Dial Pulse Register Circuit for the No. 5 Crossbar System", BLR 28:1 Jan 1950 pgs 7-12.
     
  9. "Connectors for the No. 5 Crossbar System", BLR 28:2 Feb 1950 pgs 56-61.
     
  10. "Incoming Register Circuits for No. 5 Crossbar", BLR 28:3 Mar 1950 pgs 104-106.
     
  11. "Incoming Register Link for No. 5 Crossbar", BLR 28:3 Mar 1950 pgs 115-119.
     
  12. "Pretranslation in No. 5 Crossbar", BLR 28:4 Apr 1950 pgs 156-160.
     
  13. "Ringing Selection in No. 5 Crossbar", BLR 28:4 Apr 1950 pgs 168-171.
     
  14. "Operator Connections in No. 5 Crossbar", BLR 28:5 May 1950 pgs 199-201.
     
  15. "Trouble Recording for the No. 5 Crossbar System", BLR 28:5 May 1950 pgs 214-217.
     
  16. "Design Patterns for No. 5 Crossbar", BLR 28:6 Jun 1950 pgs 245-247.
     
  17. "Sender Link Frames for No. 5 Crossbar", BLR 28:6 Jun 1950 pgs 258-261.
     
  18. "Number Group Frame for No. 5 Crossbar", BLR 28:7 Jul 1950 pgs 298-302.
     
  19. "Maintenance Facilities for the No. 5 Crossbar System", BLR 28:7 Jul 1950 pgs 313-315.
     
  20. "The Automatic Monitor", BLR 28:8 Aug 1950 pgs 343-346.
     
  21. "Trunk Selection by No. 5 Crossbar Markers", BLR 28:8 Aug 1950 pgs 357-363.
     
  22. "Equipment Arrangements for No. 5 Crossbar Markers", BLR 28:9 Sep 1950 pgs 396-399.
     
  23. "Message Register Operation in No. 5 Crossbar", BLR 28:9 Sep 1950 pgs 404-408.
     
  24. "Permanent Signals in No. 5 Crossbar", BLR 28:10 Oct 1950 pgs 461-465.
     
  25. "Register and Sender Testing in No. 5 Crossbar", BLR 28:10 Oct 1950 pgs 490-493.
     
  26. "No. 5 Crossbar Marker", BLR 28:11 Nov 1950 pgs 502-507.
     
  27. "Pulse Conversion in No. 5 Crossbar", BLR 28:12 Dec 1950 pgs 533-535.
     
  28. "Traffic Registers for No. 5 Crossbar", BLR 28:12 Dec 1950 pgs 544-547.
     
  29. "Traffic Distribution in the No. 5 Crossbar System", BLR 29:1 Jan 1951 pgs 6-11.
     
  30. "No. 5 Crossbar AMA Translator", BLR 29:2 Feb 1951 pgs 62-68.
     
  31. "No. 5 Crossbar Frames", BLR 29:9 Sep 1951 pgs 422-426.
     
  32. "Dial-Tone and Completing Markers for No. 5 Crossbar", BLR 31:1 Jan 1953 pgs 15-20.
     
  33. "New Interrupter for No. 5 Crossbar", BLR 31:10 Oct 1953 pgs 401-407.
     
  34. "No. 5 Crossbar Opens the Door to Nationwide Customer Dialing", BLR 32:4 Apr 1954 pgs 153-156.
     
  35. "No. 5 Crossbar - Marker and Transverter Testing", BLR 32:5 May 1954 pgs 190-195.
     
  36. "A New Multifrequency Receiver", BLR 32:6 Jun 1954 pgs 221-225.
     
  37. "Centralized Automatic Message Accounting", BLR 32:7 Jul 1954 pgs 241-243.
     
  38. "No. 5 Crossbar Tandem Revertive-Pulse Incoming Register", BLR 32:7 Jul 1954 pgs 268-270.
     
  39. "Code Translation in No. 5 Crossbar", BLR 32:12 Dec 1954 pgs 471-474.
     
  40. "Intertoll Features of No. 5 Crossbar", BLR 33:1 Jan 1955 pgs 30-33.
     
  41. "Foreign Area Translation in No. 5 Crossbar", BLR 33:2 Feb 1955 pgs 54-57.
     
  42. "Analysis of No. 5 Crossbar Trouble Recorder Cards", BLR 33:6 Jun 1955 pgs 206-210.
     
  43. "A PBX Alloter for No. 5 Crossbar", BLR 33:9 Sep 1955 pgs 352-354.
     
  44. "Overload Control in No. 5 Crossbar", BLR 33:10 Oct 1955 pgs 379-381.
     
  45. "Code Conversion in No. 5 Crossbar", BLR 33:11 Nov 1955 pgs 410-414.
     
  46. "The Post-War Crossbar Switch", BLR 34:5 May 1956 pgs 188-192.
     
  47. "Rapid Line Testing in Crossbar Offices", BLR 34:10 Oct 1956 pgs 378-380.
     
  48. "Test Sets for No. 5 Crossbar", BLR 34:12 Dec 1956 pgs 469-471.
     
  49. "Divisions of Telephone Numbers in the No. 5 Crossbar System", BLR 35:4 Apr 1957 pgs 139-142.
     
  50. "A Remote Line Concentrator for No. 5 Crossbar", BLR 35:5 May 1957 pgs 168-174.
     
  51. "Intermarker Group Operation in No. 5 Crossbar", BLR 35:10 Oct 1957 pgs 431-434.
     
  52. "Line Verification in No. 5 Crossbar", BLR 36:4 Apr 1958 pgs 137-141.
     
  53. "Extending CAMA with No. 5 Crossbar", BLR 36:10 Oct 1958 pgs 372-375.
     
  54. "A New AMA Translator for No. 5 Crossbar", BLR 36:11 Nov 1958 pgs 415-419.
     
  55. "Message Billing in No. 5 Crossbar CAMA", BLR 37:3 Mar 1959 pgs 101-103.
     
  56. "Coin Zone Dialing in No. 5 Crossbar", BLR 38:3 Mar 1960 pgs 106-108.
     
  57. "Class-of-Service Markings - What and Why", BLR 40:1 Jan 1962 pgs 12-17.
     
  58. "CENTREX Service with No. 5 Crossbar", BLR 40:9 Oct 1962 pgs 326-331.
     
  59. "For No. 5 Crossbar - A Packaged Central Office", BLR 40:9 Oct 1962 pgs 337-338.
     
  60. "A System Equipment Design for Growth and Flexibility", BLR 42:1 Jan 1964 pgs 27-31.
     
  61. "Improved PBX Service With No. 5 Crossbar", BLR 43:7 Jul/Aug 1965 pgs 303-305.
     
  62. "Two-Way Trunks for Package Offices", BLR 43:10 Nov 1965 pgs 402-404.
     
  63. "Custom Calling Services With No. 5 Crossbar Switching", BLR 44:3 Mar 1966 pgs 96-100.
     
  64. "No. 5 Crossbar Automatic Call Distributor", BLR 46:11 Dec 1968 pgs 370-376.
     
  65. "Expanding Centrex Services in No. 5 Crossbar", BLR 46:11 Dec 1968 pgs 377-382.
     
  66. "A Switch to Smaller Switches", BLR 48:2 Feb 1970 pgs 46-50.
     
  67. "Uses for the New Small Crossbar Switch", BLR 49:7 Aug 1971 pgs 216-221.
     
  68. "New Strategy for No. 5 Crossbar Growth", BLR 56:10 Nov 1978 pgs 264-270.

Web Pages and Websites

  1. Wikipedia article "Number Five Crossbar Switching System".