Key telephone system

GPTKB entity

Statements (49)
Predicate Object
gptkbp:instanceOf Telecommunications system
gptkbp:advantage Low cost
Easy installation
Limited scalability
Limited features compared to PBX
Manual line selection required
Simple operation
gptkbp:category Business equipment
Telephony
Office equipment
gptkbp:controlledBy Key service unit (KSU)
gptkbp:developedBy 20th century
gptkbp:hasComponent Indicator lamps
Intercom buttons
Key service unit (KSU)
Key telephone
Line buttons
gptkbp:hasConnection Intercom lines
Private lines
Public switched telephone network (PSTN)
gptkbp:hasFeature Direct line selection
Intercom capability
Line status indication
Multiple telephone lines
gptkbp:hasType 1A2 Key System
Electronic key telephone system (EKTS)
Hybrid key system
KSU-less system
https://www.w3.org/2000/01/rdf-schema#label Key telephone system
gptkbp:popularFor gptkb:Canada
gptkb:United_Kingdom
gptkb:United_States
gptkbp:predecessor Private branch exchange (PBX)
gptkbp:relatedTo gptkb:PBX
Telecommunications
Telephone exchange
Business communications
Intercom system
Hybrid system
1A2 Key System
Electronic key telephone system (EKTS)
KSU-less system
Multi-line telephone
gptkbp:replacedBy PBX systems
gptkbp:standardizedBy gptkb:Bell_System
gptkbp:usedFor Business telephone service
gptkbp:usedIn Small and medium businesses
gptkbp:bfsParent gptkb:PBX
gptkbp:bfsLayer 6