telephone exchange
telecommunications system used in public switched telephone networks or in large enterprises
AXE telephone exchange
the name of telephone exchange by Ericsson
Guardian telephone exchange
Underground, hardened telephone exchange in Manchester
System X
type of telephone exchange in UK
Vancouver Telephone Building
building in the United States of America
business telephone system
multiline telephone system typically used in business environments
AKE
Telephone switching system by Ericsson
AXE-N
telephone exchange developed by Ericsson
TOPS
Traffic Operator Position System, a computer-based operator switchboard
Anchor telephone exchange
underground, hardened telephone exchange in Birmingham
Kingsway telephone exchange
Cold War-era hardened telephone exchange underneath High Holborn in London