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Echo Canceller Test Configurations


EC Test Configuration with Laptops (see Figure 1)

Advantages and Disadvantages

  • Ability to test many channels simultaneously
  • Convenience and portability by using Laptop T1/E1 units and Notebook PCs
  • One unit runs the echo loop simulation on multiple channels using script
  • Other unit runs a GUI with stimulus and realtime visual and graphical presentation
  • A simple handset for speech input and output

Essential Elements

  • Two Laptop T1s or E1s with two Notebook PCs
  • Record/Playback Software for File transmission and capture
  • Adobe Audition Software for viewing, analyzing, and playback of captured responses
  • DTMF/MF Software for complex tone generation and detection
  • Scripted Control Software for echo loop simulation

Echo Canceller Test Configuration 1





EC Test Configuration with Ultra T1/E1 Cards in Separate PCs
(see Figure 2)

Advantages and Disadvantages

  • Ability to test more channels simultaneously than Config. 1
  • Lunchbox PCs provide some portability
  • Each Lunchbox PC can accomodate both T1 and E1 capability
  • One Card/PC runs the echo loop simulation on multiple channels using script
  • Other Card?PC runs a GUI with stimulus and realtime visual and graphical presentation
  • A simple handset with handset adapter for speech input and output

Essential Elements

  • Two Ultra T1s or E1 Cards and two Lunchbox PCs
  • Record/Playback Software for File transmission and capture
  • Adobe Audition Software for viewing, analyzing, and playback of captured responses
  • DTMF/MF Software for complex tone generation and detection
  • Scripted Control Software for echo loop simulation

Echo Canceller Test Configuration 2



EC Test Configuration with Ultra T1/E1 Cards in a Single PC
(see Figure 3)

Advantages and disadvantages

  • Ability to test T1 and E1 with a single system
  • Lunchbox PCs provide some portability
  • One PC runs both the echo loop simulation on multiple channels and stimulus and response using Scripted Control software
  • Echo Canceller testing performed entirely within script
  • Call Capture and Analysis software allows monitoring and performance evaluation of operational echo cancellers

Essential Elements

  • One Lunchbox PC with Two Ultra T1s or E1s or both
  • Record/Playback Software for File transmission and capture
  • Adobe Audition Software for viewing, analyzing, and playback of captured responses
  • DTMF/MF Software for complex tone generation and detection
  • Scripted Control Software for echo loop simulation and generation of stimulus and capture of response
  • Call Capture and Analysis Software for monitoring and capture of operational echo cancellers Single PC w/ 2 Ultra T1/E1 Cards

Echo Canceller Test Configuration 3

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