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The Evolution of switching system technology
Manual Switches
Step by Step (SXS)
Cross Bar
Stored Program Control (SPC)
The Evolution of switching system technology
Manual Switches
Step by Step (SXS)
Cross Bar
Stored Program Control (SPC)
Time Division Switching
Introduction to Customer Switching Systems (CSS)


   •the CSS switching equipment
   •user extension equipment
   •distributors
   •cable
   •connection to PSTN and/or remote CSS
Introduction to Customer Switching Systems (CSS)

   •private automatic branch exchange (PABX)
   •small business (key) system (SBS)
   •automatic call distributor (ACD)

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Topic6b

  • 1. The Evolution of switching system technology Manual Switches Step by Step (SXS) Cross Bar Stored Program Control (SPC)
  • 2. The Evolution of switching system technology Manual Switches Step by Step (SXS) Cross Bar Stored Program Control (SPC) Time Division Switching
  • 3. Introduction to Customer Switching Systems (CSS) •the CSS switching equipment •user extension equipment •distributors •cable •connection to PSTN and/or remote CSS
  • 4. Introduction to Customer Switching Systems (CSS) •private automatic branch exchange (PABX) •small business (key) system (SBS) •automatic call distributor (ACD)