Epson 3300 manual Fxo, Codec VAD Enable or Disable VAD Voice Activity

	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.

112 Vigor3300 Series User’s Guide