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Telephone Switching Systems of North America (Main Page)
| This section discusses telephone switching systems, where phone calls
are "switched" meaning they cross through a switching matrix to route calls from
an origination point to a destination point.
Local "central offices" are where the end users are located. This is the most common switching system in the telephone network. Long Distance "tandem" switches are where long-haul long distance calls are switched to connect local central office switches throughout the world. North American (US/Canada) Vintage (electro-mechanical), Modern (analog and digital electronic) as well as cutting-edge packet-based switching systems are discussed here. Timeline of Telephone Switch Development Telephone Switch
Timeline Vintage
Electro-Mechanical Step by Step (Strowger) Switching
Systems Western Electric Panel Switching
Systems Western Electric Crossbar
Switching Systems North Electric Crossbar
Switching Systems Other Vintage Switching Systems
of Note Historic Number 4 Crossbar (#4XB)
List Modern Electronic &
Digital Overview & Background of
Modern (Electronic & Digital Switching) Systems Automatic Electric Modern
Switching Systems Northern Telecom (Nortel) Modern
Switching Systems TRW-Vidar Switching
Systems Western Electric Modern Switching
Systems Other Modern Switching Systems
of Note The Next
Generation: Softswitch Telephone
Switching Systems Other Telephone Switch Systems websites (off-site) Central Office
Online List of Telephone
Switches |