PLANET VIP-1680 - Manual (Page 36)

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H.323 VoIP Advance Configurtion
Smart-QoS
If this function is enabled, when VoIP call is occurred, the other
data will be automatically reduced traffic which across the
internet in order to guarantee the voice bandwidth.
DTMF Relay for H.323
After the VoIP call is connected, when you dial a digit, this digit
is sent to the other side by DTMF tone. There are two methods
of sending the DTMF tone. The first is “in band”, that is, sending
the DTMF tone in the voice packet. The other is “out band”, that
is, sending the DTMF tone as a signal. Sending DTMF tone as
a signal could tolerate more packet loss caused by the network.
If this selection is enabled, the DTMF tone will be sent as a
signal.
H.323 Start Mode
This selection could force the gateway to use normal start mode
(default mode) or fast start mode when establishing a VoIP call.
Many other gateways only support normal start mode, enable
this selection when it is necessary. The default is disabled
(using fast start mode).
H.323 H.245 Tunneling
This selection could force the gateway to use normal start mode
(default mode) or fast start mode when establishing a VoIP call.
Many other gateways only support normal start mode, enable
this selection when it is necessary. The default is disabled
(using fast start mode).
FAX Mode Option T.30/T.38 real-time FAX compliant Voice/FAX auto-switch.