4.3.1 Manual Mode

To run the CSP demo in manual mode for a T-1 board, type:

cspdemo -t 

To run the CSP demo in manual mode for an E-1 board, type:

cspdemo -e 

To run the CSP demo in manual mode (the default mode) for an analog board, type:

cspdemo -a   OR   cspdemo 

Since analog board is the default option, you can omit -a from the command line.

The manual mode is a single-channel demo that uses the first channel of the CSP-enabled board configured as the first board in your system. This mode allows you to listen to a prompt and interrupt as the prompt is playing. Messages are displayed on your screen as the demo progresses. This mode illustrates the operation of the ec_reciottdata( ) function and the ec_stream( ) function.

On digital boards, the manual mode also shows how to route a CSP resource to another span's network resource.

In the manual mode, the demo runs as follows:

1. After the demo starts, a welcome prompt, sample.pcm, is played. It starts with "Welcome ..."
2. This part of the demo illustrates the operation of the ec_reciottdata( ) function. As the prompt is playing, you can interrupt the prompt or barge-in through the T-1, E-1 or analog line.

   As soon as you speak, the prompt stops playing and echo-cancelled recording begins. TDX_BARGEIN and TEC_VAD events are generated. The demo records your message for 6 seconds and stores the message in ec_reciott.pcm. At the end of this time, the TEC_STREAM event is generated to indicate termination of recording.

   The demo then plays back the echo-cancelled recording of your message.

   Note that if the prompt completes without any barge-in, the TDX_PLAY is generated.

3. The welcome prompt is played again. This part of the demo illustrates the operation of the ec_stream( ) function.

   As the prompt is playing, you can interrupt or barge-in through the T-1, E-1 or analog line.

   As soon as you speak, the prompt stops playing and the echo-cancelled recording begins. The TDX_BARGEIN and TEC_VAD events are generated. Your echo-cancelled speech in the data buffer is streamed to a user-defined callback function. A message is displayed on your screen stating that the data buffer has been received. The TEC_STREAM event is generated to indicate termination of streaming.

   The demo then plays back the echo-cancelled recording of your message.

4. The demo is completed.

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