In this routing example a simple service is created which uses lists and variables. We recommend you follow and program this version. The knowledge gained in the Programming Example section is assumed.

The object is that callers should only be able to take part once in a vote. If callers ring twice, they should hear a prompt that they have already voted.

To achieve this, the hash value of the caller’s number is entered into a list. The hash value is stored in the variable $callerhash and is a unique code representing the caller’s number (in contrast with $caller, which depending on your rights in the system may be shortened using xxx or invisible). During every call a list is checked. If the hash value is found in the list, then the caller has already called.

Proceed as follows:

  1. First of all, create a list. Lists are created by accessing the function System Settings - Lists in the main menu. Use New to create a new list, and name it Callers. You will not need to create any entries - values will be added to the list when people call the system.
  2. Create a new routing application. After the Start object, add an object List Lookup.
  3. In the properties of this object select the Callers list as the Key Column 1 and enter Key Value $callerhash.
    In this example, the variable $callerhash is to be looked up in the first column of the list. If an entry is found, program execution will continue with the object output Found and the caller should be played a prompt that they have already called the system.
  4. Connect the Found output to a Play Voice object containing a prompt You have already voted.
  5. After the play voice object, add a Hangup object (optional).
    The program should in principle look like the following:
  6. If the value is not found in the list, the output Not Found will be used. Add an Input Menu DTMF object to this output. In the parameters, setup a prompt with the following announcements: “Press one to vote yes, and press two to vote no.”
  7. Add two List Functions objects to the outputs 1 and 2 of the input menu dtmf object.
  8. Call the first object Vote YES and parameterise it as follows:
    List: Callers
    Function: Add Value to List
    Value 1: $callerhash
    Value 2: $caller
    Value 3: $input
    Value 4: YES
  9. Call the second object Vote NO and parameterise it as the first list, for Value 4 enter NO.
  10. Add a prompt Your vote has been counted after the objects List Operations and connect it with both objects.
  11. After the play voice object, add a Hangup object (optional).
    The program should in principle look like the following:
  12. Test the program by calling it.
  13. To check the results, use the function System Settings - Lists and view the Callers list. The 4 fields should be filled with values.
  14. In the table of routing applications select the Counter Statistics function for the application. A new window opens showing the routing application. The numbers in red indicate how often a particular object has been executed. This gives you a quick way of viewing how many callers have voted Yes and how many No.
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