Digital Switching. A digital switch is a computer which electronically routes digitally encoded messages through a network.

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Presentation transcript:

Digital Switching

A digital switch is a computer which electronically routes digitally encoded messages through a network.

Advantages Faster More Reliable More Flexible Smaller Intelligent

Disadvantages Control Complexity

System Switching Components Switching matrix Controller Database Line circuits Truck circuits Common equipment

Space Switch

Time Switch

T-S-T

S-T-S

Transfer Steps “Call” set up Acknowledgement (or not) Release

Types of Control Control Channel Packet, Frame or Datagram Switched

Transfer rates: 10mbps to 3.4gbps