58-002

Digital switching techniques and applications are covered, including time and space switching and the control of a digital switch by connection memory. Call state transistion diagrams, which conform to ITU-T SDL format for call progress, are introduced, as well as concepts of call state and state transition, and the three stages of call handling.

The system comprises:

• Controller
• Digital switching centre board
• One, four telephone handset kit

Features

• Relevant to study of Central Switching exchanges or PAB exchanges
• Uses commercial CODECs

Curriculum Coverage

• Local signalling
• Digital switch principles
• Digital switch
• Line scan
• Call records
• Line records
• Line maps
• State transitions
• Call progress
• Manual control
• Testing
• Traffic