Draytek VigorIPPBX 2820 Series User Manual page 312

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Region
Volume Gain
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
recommended for you to use the default settings for VoIP
communication.
Mic Gain (1-10)/Speaker Gain (1-10) - Adjust the
volume of microphone and speaker by entering number
302
VigorIPPBX 2820 Series User's Guide

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