1. For the test we use:

• two SIP accounts;
• a softphone to answer the call;
• the REST client of the Chrome browser.

2. On the WCS server create a directory: /usr/local/FlashphonerWebCallServer/media. Put a file in the RIFF WAV format there, for example test.wav.

3. Open the REST client. Send the /call/startup query to the WCS server and specify in its parameters:

• parameters of your SIP account the call is made from;
• the name of your second SIP account the call is made to.

4. Receive the call in the softphone:

5. From the REST-client send the /call/inject_sound query to the WCS server and specify in the query's parameters:

• the identifier of the call;
• the name of the applied audio file (test.wav).

6.Make sure the softphone plays the test file.

7. To terminate the call, click the corresponding button in the softphone.