Voicetronix Programming Guide
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# Pip Functions

The following functions support pip generation on the OpenLog8i:

`vpb_get_pip()`
`vpb_set_pip()`
`vpb_pip_on()`
`vpb_pip_off()`

There is a requirement by national communication authorities, in the instance of recording calls, that the parties must be notified that their call is being recorded. The pip parameters, the length of the pip pulse and the period between pulses, can be modified by `vpb_set_pip()`. The `VPB_PIP` structure contains these parameters.

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