Statements (14)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
telephone switch
|
| gptkbp:architecture |
time-division switching
|
| gptkbp:developedBy |
gptkb:Bell_Labs
|
| https://www.w3.org/2000/01/rdf-schema#label |
No. 4 ESS switch
|
| gptkbp:introducedIn |
1976
|
| gptkbp:location |
gptkb:United_States
|
| gptkbp:replacedBy |
gptkb:No._4_Crossbar_switch
|
| gptkbp:retired |
early 2000s
|
| gptkbp:technology |
electronic switching system
|
| gptkbp:type |
tandem switch
|
| gptkbp:usedBy |
gptkb:AT&T
|
| gptkbp:usedFor |
long-distance telephone switching
|
| gptkbp:bfsParent |
gptkb:Bell_System
|
| gptkbp:bfsLayer |
5
|