Statements (23)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
telephone switch
|
| gptkbp:alsoKnownAs |
gptkb:4ESS
|
| gptkbp:architecture |
time-division switching
|
| gptkbp:component |
call processing software
common channel signaling digital trunk interface time-slot interchange |
| gptkbp:controls |
gptkb:1A_processor
|
| https://www.w3.org/2000/01/rdf-schema#label |
No. 4ESS switch
|
| gptkbp:introduced |
1976
|
| gptkbp:location |
gptkb:United_States
|
| gptkbp:manufacturer |
gptkb:AT&T
gptkb:Western_Electric |
| gptkbp:predecessor |
gptkb:No._4A_crossbar_switch
|
| gptkbp:replacedBy |
gptkb:5ESS_switch
|
| gptkbp:roadType |
toll network
|
| gptkbp:status |
still in limited use
|
| gptkbp:technology |
digital electronic switching
|
| gptkbp:usedBy |
gptkb:Bell_System
gptkb:AT&T_Long_Lines |
| gptkbp:usedFor |
long-distance telephone switching
|
| gptkbp:bfsParent |
gptkb:Bell_System
|
| gptkbp:bfsLayer |
5
|