Statements (11)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
telephone switch
|
| gptkbp:developedBy |
gptkb:Bell_System
|
| https://www.w3.org/2000/01/rdf-schema#label |
No. 1A1 switch
|
| gptkbp:introducedIn |
1960s
|
| gptkbp:replacedBy |
gptkb:1A2_Key_Telephone_System
gptkb:No._1A_switch |
| gptkbp:usedFor |
key telephone systems
|
| gptkbp:usedIn |
telephone systems
business telephone systems |
| gptkbp:bfsParent |
gptkb:Bell_System
|
| gptkbp:bfsLayer |
5
|