What is the DTMF inband/outband setting for ?
DTMF tones are the regular tones produced when you press keys on your telephone handset. By default, during an active call when you press a key, the Vigor will not process it specially; it will be sent as regular sound, just like your voice. If you select ‘outband’ when you press a DTMF digit, the vigor will intercept it and send the dialled digit in digital format (i.e. digit ‘5’ instead of the tone for ‘5’) so that it is reproduced perfectly at the remote end. This is useful on congested/distant or low quality calls.