Dial tones
If the phone is being operated on a PBX in which an exchange line access number has to be dialled to access the exchange line, provisioning the dial tone in the Identity area will enable different dial tones to be played for the user: depending on whether the user is still within the PBX or in the public network.
Details about provisioning this function in the Auerswald DokuWikiInternal dial tone, 3x short
•After the receiver has been picked up within the PBX.
External dial tone, 1x long
•After the receiver has been picked up on the exchange line because:
−automatic exchange line request is enabled
−a direct exchange line phone has been selected
or
−"0" has been dialled.