Statements (12)
Predicate | Object |
---|---|
gptkbp:instanceOf |
telephone switch
|
gptkbp:developedBy |
gptkb:Western_Electric
|
https://www.w3.org/2000/01/rdf-schema#label |
No. 3 ESS switch
|
gptkbp:introduced |
1970s
|
gptkbp:location |
gptkb:United_States
|
gptkbp:replacedBy |
electromechanical switches
|
gptkbp:technology |
electronic switching system
|
gptkbp:usedBy |
gptkb:Bell_System
|
gptkbp:usedFor |
local telephone service
|
gptkbp:usedIn |
gptkb:telephone_networks
|
gptkbp:bfsParent |
gptkb:Bell_System
|
gptkbp:bfsLayer |
5
|