Statements (13)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:telephone_switch
|
| gptkbp:developedBy |
gptkb:Bell_Labs
|
| gptkbp:introduced |
1930s
|
| gptkbp:replacedBy |
gptkb:electronic_switching_system
panel switch |
| gptkbp:technology |
crossbar switch
|
| gptkbp:usedBy |
gptkb:AT&T
|
| gptkbp:usedFor |
automatic telephone switching
|
| gptkbp:usedIn |
gptkb:United_States
telephone exchanges |
| gptkbp:bfsParent |
gptkb:Bell_System
|
| gptkbp:bfsLayer |
5
|
| http://www.w3.org/2000/01/rdf-schema#label |
No. 2XB switch
|