Trunk Network System

Trunk Network System

58-004

In addition to the curriculum covered by 58-002 and 58-003 the Trunks Network Board has three transit switches and extends the work to cover transit switching and signalling. The system can be configured as four local switching centres, to cover simple transit switching, two level transit switching, non-associated signalling and the use of ITU-T type transaction capability messages to control system testing. For ease of use and to accommodate all the modules on the student bench a vertical mounting-rack is available as an optional extra.

All systems require the use of a standard PC.

The system comprises:

• Controller
• 2 Digital Switching Centre Boards
• 2 Four Telephone Handset Kits
• Trunk Networks Board

• Features

  • Four local switching centres
  • Can be easily upgraded from 58-003
  • Easily configurable

• Subject Area

  • Local Signalling
  • Operation
  • Tones and Cadences
  • Digital Switch Principles
  • Time Switching
  • Time & Space Switching
  • Digital Switch Control
  • Control of Time Switch
  • Connection of Tones
  • Line Scan
  • Switch Hook
  • DTMF Receivers
  • Call Records
  • Call State
  • Line Identities
  • Call Time
  • Line Records
  • Directory Numbers
  • Call Accounting
  • Line Maps
  • Location Maps
  • Condition Maps
  • State Transitions
  • Inputs, Outputs
  • Tasks
  • Call Progress
  • Call Set Up
  • Call Suspension
  • Call Release
  • Manual Control
  • Control
  • Testing
  • Test Out and Loop Back
  • Traffic
  • System Traffic
  • Trunk Configuration
  • Trunk Paths
  • Numbering
  • Tones and Cadences
  • Trunk Switching
  • Outward Path
  • Return Path
  • Signal Protocol Controller
  • Flags
  • Frame Check Sequence
  • Zero Insertion (Bit Stuffing)
  • Trunk Signal Units
  • Message Signal Units
  • Fill-On Signal Units
  • Signalling Information
  • Field
  • Label
  • Heading Codes
  • Address Signals
  • Error Control
  • Sequence Numbers
  • Buffers
  • Trunk State Diagrams
  • Originating Switch
  • Dialling
  • Destination Switch
  • Trunk Call Progress
  • Originating Switch
  • Dialling
  • Destination Switch
  • Transit Switching Centre
  • Numbering
  • Transit Switch CSTD
  • Transit Signalling
  • Transit Switching Call
  • Progress
  • Transit Switch Centre
  • Originating Switch
  • Destination Switch
  • Two Level Transit Switching
  • Numbering
  • Dialling CSTD
  • Routeing Tables
  • Two Level Transit Call
  • Progress
  • Signalling
  • 1st & 2nd Level
  • Switches
  • Non-Associated Signalling
  • Signalling
  • Call Progress
  • System Testing
  • TCAP Signalling
  • Testing
  • Manual Testing