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Vigor3300 Series User’s Guide
112
Hotline Number to PBX / PSTN- Pre-set a phone number to
make the port dialing out to PBX/PSTN automatically.
FXO Manual Disconnection - Click Disconnect to disconnect this
phone line by manual.
Codec Preferred Codec - It can be applied on this port. Vigor3300
supports five Codecs. The default setting is G.729A. You can
choose another one as preferred Codec for outgoing calls.
Single Codec - If you checked this box, only preferred codec
will be used for outgoing and incoming calls. And if the remote
end does not support such Codec, the VoIP communication will
be failed.
Codec Rate - Type the rate value to be applied on this port.
Codec VAD- Enable or Disable VAD (Voice Activity
Detection). It can detect whether the voice activity is
progressing or not. If not, RTP packets transmission will be
stopped for saving more bandwidth.
CAS Microphone Gain- The gain value while transmitting voice.
The default value is 0. The range is from -32 to 31.
Speaker Gain - The gain value while receiving voice. The
default value is 0. The range is from -32 to 31.
FAX FAX Mode -The FAX function mode. There are three options:
Transparent: FAX will be transmitted via voice channel; no fax
relay and no Codec change will be involved.
T.38 Relay: Using T.38 Fax Relay. This is the default value.
Bypass: Once FAX is detected, the Codec will automatically
switch to a high bit rate type (G.711a/u or G.726) to make sure
FAX can transmit successfully.
If this option is selected, the Vigor3300 will apply these two
following settings (FAX Bypass Codec and FAX Bypass Codec
Rate).
FAX Bypass Codec - Select one option to be applied if FAX
mode is configured as Bypass mode.