User manual

26xx Technical Manual EN-V108
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db).
Remote receive volume Specify the volume gain of the voice in
the remote side (+5~-20 db, default is
-3 db, default is -3 db).
DTMF volume Specify the volume gain of the DTMF
(+3~-32 db, default is -10 db).
1. Press the “Apply” button (at the bottom) after you finish to save changes.
2. Press the “Reboot” button to apply the changes.