In order to play a standard greeting again, a temporary greeting must be removed.
To remove temporary greeting from the extension user should call the voicemail menu (*123 by default) from the phone on which the extension is registered and follow Voicemail IVR instructions:
After 2 is pressed temporary greeting will be erased and the standard greeting which was used before will be played or the user can upload/record a new one by following the procedure explained at the beginning of the guide.