Statements (18)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
telephone switch
|
| gptkbp:controls |
stored program control
|
| gptkbp:developedBy |
gptkb:Bell_Labs
|
| https://www.w3.org/2000/01/rdf-schema#label |
No. 1A ESS switch
|
| gptkbp:introducedIn |
1976
|
| gptkbp:locationOfDeployment |
gptkb:United_States
|
| gptkbp:manufacturer |
gptkb:Western_Electric
|
| gptkbp:notableFeature |
modular design
improved reliability over No. 1 ESS |
| gptkbp:predecessor |
gptkb:No._1_ESS_switch
|
| gptkbp:replacedBy |
gptkb:5ESS_switch
|
| gptkbp:technology |
electronic switching
|
| gptkbp:usedFor |
tandem switching
local switching telephone call switching |
| gptkbp:usedIn |
gptkb:public_switched_telephone_network
|
| gptkbp:bfsParent |
gptkb:Bell_System
|
| gptkbp:bfsLayer |
5
|