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- Number_Five_Crossbar_Switching_System abstract "The Number Five Crossbar Switching System or 5XB switch, designed by Bell Labs and made by Western Electric, was in use in Bell System telephone exchanges from 1948 to the early 1990s. Its principal use was as a Class 5 telephone switch, though variants were used as combined class 4/5 in rural areas and as a TWX switch. 5XB was originally intended to bring the benefits of crossbar switching to small towns with only a few thousand telephone lines. The earlier 1XB urban crossbar was impractically expensive in small installations, and had difficulties handling large trunk groups. 5XB was converted to wire spring relays in the 1950s and otherwise upgraded in the 1960s to serve exchanges with tens of thousands of lines. The final 5A Crossbar variant in the early 1970s returned to its roots, being available only in sizes of 960 and 1920 lines, and generally delivered on one pallet rather than assembled on site as usual for larger exchanges.".
- Number_Five_Crossbar_Switching_System thumbnail Crossbar-200pt-hy3.jpg?width=300.
- Number_Five_Crossbar_Switching_System wikiPageExternalLink No_5_Crossbar_Circuit_Description_SCD-10-01_r_OCR_r.pdf.
- Number_Five_Crossbar_Switching_System wikiPageExternalLink switches_survey_chapter_7.html.
- Number_Five_Crossbar_Switching_System wikiPageID "8222445".
- Number_Five_Crossbar_Switching_System wikiPageLength "19312".
- Number_Five_Crossbar_Switching_System wikiPageOutDegree "55".
- Number_Five_Crossbar_Switching_System wikiPageRevisionID "644921200".
- Number_Five_Crossbar_Switching_System wikiPageWikiLink 1ESS_switch.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Automatic_message_accounting.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Autovon.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Bell_Labs.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Bell_System.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Bell_System_Practices.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Category:History_of_the_telephone.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Category:Telephone_exchange_equipment.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Centrex.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Class-4_telephone_switch.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Class-5_telephone_switch.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Class_of_service.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Cord_circuit.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Crossbar_switch.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Direct_distance_dialing.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Disconnect_supervision.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink E_and_M_signaling.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink File:Crossbar-200pt-hy3.jpg.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink File:Crossbar-irrp1-hy.jpg.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink File:Mtf_area-hy.jpg.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink File:Originating_Register,_Number_Five_Crossbar_Switching_System_(Museum_of_Communications,_Seattle).jpg.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Junctor.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Line_signaling.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Marker_(telecommunications).
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Multi-frequency_signaling.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Number_One_Crossbar_Switching_System.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Off-hook.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Pallet.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Panel_switch.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Party_line_(telephony).
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Payphone.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Public_switched_telephone_network.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Register_signaling.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Stored_program_control.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Telegraphy.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Telephone_exchange.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Telephone_line.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Tip_and_ring.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Traffic_Service_Position_System.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Two-out-of-five_code.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Videophone.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Western_Electric.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink Wire_spring_relay.
- Number_Five_Crossbar_Switching_System wikiPageWikiLink File:Uy-multi1-hy.jpg.
- Number_Five_Crossbar_Switching_System wikiPageWikiLinkText "#5 Crossbar switch".
- Number_Five_Crossbar_Switching_System wikiPageWikiLinkText "#5 Crossbar".
- Number_Five_Crossbar_Switching_System wikiPageWikiLinkText "No. 5 Crossbar switching system".
- Number_Five_Crossbar_Switching_System wikiPageWikiLinkText "Number 5 Crossbar systems".
- Number_Five_Crossbar_Switching_System wikiPageWikiLinkText "Number 5 Crossbar telephone switch".
- Number_Five_Crossbar_Switching_System wikiPageWikiLinkText "Number Five Crossbar Switching System".
- Number_Five_Crossbar_Switching_System wikiPageUsesTemplate Template:Telephone_Switches.
- Number_Five_Crossbar_Switching_System subject Category:History_of_the_telephone.
- Number_Five_Crossbar_Switching_System subject Category:Telephone_exchange_equipment.
- Number_Five_Crossbar_Switching_System type Exchange.
- Number_Five_Crossbar_Switching_System type Switch.
- Number_Five_Crossbar_Switching_System comment "The Number Five Crossbar Switching System or 5XB switch, designed by Bell Labs and made by Western Electric, was in use in Bell System telephone exchanges from 1948 to the early 1990s. Its principal use was as a Class 5 telephone switch, though variants were used as combined class 4/5 in rural areas and as a TWX switch. 5XB was originally intended to bring the benefits of crossbar switching to small towns with only a few thousand telephone lines.".
- Number_Five_Crossbar_Switching_System label "Number Five Crossbar Switching System".
- Number_Five_Crossbar_Switching_System sameAs Q7069514.
- Number_Five_Crossbar_Switching_System sameAs m.026wqd8.
- Number_Five_Crossbar_Switching_System sameAs Q7069514.
- Number_Five_Crossbar_Switching_System wasDerivedFrom Number_Five_Crossbar_Switching_System?oldid=644921200.
- Number_Five_Crossbar_Switching_System depiction Crossbar-200pt-hy3.jpg.
- Number_Five_Crossbar_Switching_System isPrimaryTopicOf Number_Five_Crossbar_Switching_System.