Matrix NAVAN CNX200, System Manual

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392 Matrix NAVAN CNX200 System Manual
22.
To change the Transmit Gain of the Speakerphone MIC Volume, set Speaker Transmit Volume Level to
the desired level, from 0 to 7. Default: 4.
23.
To change the Receive Gain of the Speakerphone MIC Volume, set Speaker Receive Volume Level to
the desired level, from 0 to 7. Default: 4.
24.
To use a Headset with the IP phone, set Headset Connected? to Yes. Default: No.
Make sure that you connect a Headset to the IP phone, if you select Yes.
25.
Select the Auto Answer check box to enable this feature on the IP phone. Default: Disabled.
When you set the “Auto Answer” feature on the IP phone, the phone goes OFF-Hook automatically after a
preset period of time, without the extension user having to pick up the handset or press the speaker or
headset key. When you enable Auto Answer, you must configure the Auto Answer Timer.
26.
If you enabled Auto Answer on the phone, set the Auto Answer Timer (sec) to the desired value.
This timer defines the time in seconds that the IP phone should wait before going OFF-Hook to auto
answer a call. The range of this timer is 1 to 9 seconds. Default: 1 second.
27.
Set the Back Light Off Time (sec) to the desired value, if required, from 000 to 999 seconds. Default: 10
seconds.
28.
Adjust the Backlight brightness of the phone’s LCD display, by setting the LCD Backlight Level to the
desired value, from 1 to 4. Default: 3.
29.
Set the LCD Contrast Level to a level from 1 to 4 that is comfortable to you. Default: 3.
Transport Mode and SRTP
30.
Select Transport Mode and enable SRTP :
• Select the protocol to be used to transport the SIP messages. You can select the Transport Mode as
TCP or TLS . When security of SIP messages is of primary concern, you should select TLS.
If you select TCP, make sure that Enable SIP Over TCP check box is selected in VoIP Port page located
under PBX Settings tab. For details, see “VoIP Port” .
If you select TLS, make sure that Enable SIP Over TLS check box is selected in VoIP Port page located
under PBX Settings tab. For details, see “VoIP Port” .
31.
For secured conversations, select the Enable SRTP? check box. It offers confidentiality, message
authentication, and replay protection for the RTP traffic which prevents eavesdropping and improves the
voice quality.
RTP Port
32.
Define RTP Port :
• RTP Listening Port: This is the port on which the IP phone listens for RTP packets. This port is also
used as the source port for sending RTP packets to the remote peer. The valid range for this port is
1025-65278. Default: 8000.