Draytek Vigor2820 Series User Manual page 185

In addition, you can press the Advanced button to configure tone settings, volume gain,
MISC and DTMF mode. Advanced setting is provided for fitting the telecommunication
custom for the local area of the router installed. Wrong tone settings might cause
inconvenience for users. To set the sound pattern of the phone set, simply choose a proper
region to let the system find out the preset tone settings and caller ID type automatically. Or
you can adjust tone settings manually if you choose User Defined. TOn1, TOff1, TOn2 and
TOff2 mean the cadence of the tone pattern. TOn1 and TOn2 represent sound-on; TOff1 and
TOff2 represent the sound-off.
Region
Vigor2820 Series User's Guide
configured.
Loop Through to ISDN1-S0 Port – Choose this radio button
to make all the calls controlled by ISDN line.
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.
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