| dbo:abstract |
The Number Five Crossbar Switching System (5XB switch) is a telephone switch for telephone exchanges designed by Bell Labs and manufactured by Western Electric starting in 1947. It was used in the Bell System principally as a Class 5 telephone switch in the public switched telephone network (PSTN) until the early 1990s, when it was replaced with electronic switching systems. Variants were used as combined Class 4 and Class 5 systems in rural areas, and as a TWX switch. 5XB was originally intended to bring the benefits of crossbar switching to towns and small cities with only a few thousand telephone lines. The typical starting size was 3000 to 5000 lines, but the system had essentially unlimited growth capacity. 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, produced starting in 1972, was available only in sizes of 990 and 1960 lines, and generally delivered on one pallet, rather than assembled on site as usual for larger exchanges. (en) |
| dbo:thumbnail |
wiki-commons:Special:FilePath/5xb-wiki-junctors.svg?width=300 |
| dbo:wikiPageExternalLink |
http://www.telephonetribute.com/switches_survey_chapter_7.html |
| dbo:wikiPageID |
8222445 (xsd:integer) |
| dbo:wikiPageLength |
23304 (xsd:nonNegativeInteger) |
| dbo:wikiPageRevisionID |
1120102778 (xsd:integer) |
| dbo:wikiPageWikiLink |
dbr:Electronic_switching_system dbr:Bell_Labs dbr:Bell_System dbr:E_and_M_signaling dbc:History_of_the_telephone dbr:Cord_circuit dbr:Crossbar_switch dbr:TSPS dbr:Pallet dbr:Panel_switch dbr:Party_line_(telephony) dbr:Western_Electric dbr:Class_4_telephone_switch dbr:Class_5_telephone_switch dbr:Class_of_Service dbr:Junctor dbr:Line_signaling dbr:1ESS_switch dbc:Telephone_exchange_equipment dbr:File:Originating_Register,_Number_Five...useum_of_Communications,_Seattle).jpg dbr:Centrex dbr:Direct_distance_dialing dbr:File:Mtf_area-hy.jpg dbr:Telephone_exchange dbr:Register_signaling dbr:Telephone_lines dbr:File:Crossbar-200pt-hy3.jpg dbr:File:Crossbar-irrp1-hy.jpg dbr:Telegraphy dbr:Teletype_Corporation dbr:Tip_and_ring dbr:Automatic_message_accounting dbr:Autovon dbr:Marker_(telecommunications) dbr:Multi-frequency dbr:Public_switched_telephone_network dbr:Off-hook dbr:Wire_spring_relay dbr:Stored_program_control_exchange dbr:Two-out-of-five_code dbr:Picturephone dbr:Line_signalling dbr:IDDD dbr:1XB dbr:1XB_switch dbr:Coin_phone dbr:Answer_supervision dbr:Multilevel_precedence_and_preemption dbr:File:5xb-wiki-junctors.svg dbr:File:Uy-multi1-hy.jpg |
| dbp:wikiPageUsesTemplate |
dbt:Refimprove dbt:Telephone_Switches |
| dct:subject |
dbc:History_of_the_telephone dbc:Telephone_exchange_equipment |
| rdfs:comment |
The Number Five Crossbar Switching System (5XB switch) is a telephone switch for telephone exchanges designed by Bell Labs and manufactured by Western Electric starting in 1947. It was used in the Bell System principally as a Class 5 telephone switch in the public switched telephone network (PSTN) until the early 1990s, when it was replaced with electronic switching systems. Variants were used as combined Class 4 and Class 5 systems in rural areas, and as a TWX switch. (en) |
| rdfs:label |
Number Five Crossbar Switching System (en) |
| owl:sameAs |
freebase:Number Five Crossbar Switching System wikidata:Number Five Crossbar Switching System https://global.dbpedia.org/id/4sWKH |
| prov:wasDerivedFrom |
wikipedia-en:Number_Five_Crossbar_Switching_System?oldid=1120102778&ns=0 |
| foaf:depiction |
wiki-commons:Special:FilePath/Uy-multi1-hy.jpg wiki-commons:Special:FilePath/5xb-wiki-junctors.svg wiki-commons:Special:FilePath/Crossbar-200pt-hy3.jpg wiki-commons:Special:FilePath/Crossbar-irrp1-hy.jpg wiki-commons:Special:FilePath/Mtf_area-hy.jpg wiki-commons:Special:FilePath/Originating_Register,...useum_of_Communications,_Seattle).jpg |
| foaf:isPrimaryTopicOf |
wikipedia-en:Number_Five_Crossbar_Switching_System |
| is dbo:wikiPageRedirects of |
dbr:5XB_switch dbr:5XB dbr:5XB_Switch dbr:5xb_switch dbr:No._5_Crossbar |
| is dbo:wikiPageWikiLink of |
dbr:5XB_switch dbr:Bell_Labs dbr:Number_One_Crossbar_Switching_System dbr:Connections_Museum dbr:Panel_call_indicator dbr:Junctor dbr:Palo_Alto,_California dbr:Tech_Model_Railroad_Club dbr:Push-button_telephone dbr:Automatic_call_distributor dbr:Autovon dbr:Marker_(telecommunications) dbr:List_of_telephone_switches dbr:LCR dbr:5XB dbr:5XB_Switch dbr:5xb_switch dbr:No._5_Crossbar |
| is foaf:primaryTopic of |
wikipedia-en:Number_Five_Crossbar_Switching_System |
