52 Model 53i IP Phone User Guide
Line Keys and Programmable Keys

Flash Key

You can set a programmable key to generate a flash event when it is pressed on the
53i. You do this by setting the programmable key to "flash". The IP phone generates
flash events only when a call is connected and there is an active RTP stream (for
example, when the call is not on hold).
Configuring a Flash Key
1. Click on Operation->Programmable Keys.
2. Select a "Key 3" through "Key 6".
3. In the "Hard Key" field, select flash.
4. Click to save your changes.
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