Available settings are explained as follows:
Item
Region
Description
Select the proper region which you are located. The common
settings of Caller ID Type, Dial tone, Ringing tone, Busy
tone and Congestion tone will be shown automatically on
the page. If you cannot find out a suitable one, please choose
User Defined and fill out the corresponding values for dial
tone, ringing tone, busy tone, congestion tone by yourself for
VoIP phone.
Also, you can specify each field for your necessity. It is
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Vigor2925 Series User's Guide