- Crossbar with stored program control
- Digital Switching(figure) ->
- Digital switching based on time-space-time (TST) switching structure
- Packet Switching
- Existing switching methods allow interconnection of users at discrete
information transfer rate e.g., 64 Kbps, or 1.544 Mbps.
- Customers "will demand" dynamic allocation of transfer rates, e.g., to
exactly match their specific needs.
- Packet switching will provide dynamic allocation of transfer rates. (The
proposed form of packet switching for the public network is called
Asynchronous Transfer Mode (ATM)).
- Optical Switching
- All current telecommunication switches are electronic, therefore they
require photon-to-electron conversions (provided in optical to
electronic (E/O)) interfaces.
- Optical switching will illiminate these interfaces and therefore allow
for cheaper and faster switching.