Ports And Trunks; Line (Fxo) Ports; Adjust Fxo Gain - Cisco UC320W Administration Manual

Ports and Trunks

In the Ports and Trunks section of the Configuration module, you enable the FXO (analog) trunks,
configure the SIP/BRI (Voice over IP) trunks, and enable the FXS ports for analog devices.

Line (FXO) Ports

Use the Configuration > Ports and Trunks > Line (FXO)
Ports page to enable the FXO ports for your analog
phone lines. This configuration page is available if the
System Mode is set to Key System or Blend. (See the
PBX/Key System page.)
General Information and Options
• This page displays the FXO ports on your Cisco
UC320W and any Cisco SPA8800 IP telephony
gateways that are connected.
• The Cisco UC320W supports up to 12
simultaneous calls across all trunks (including
FXO and SIP/BRI trunks).
• An error message appears if you have not
enabled any trunks for outbound calls (including FXO and SIP/BRI trunks).
Settings for FXO Ports
• Enabled: Check the box to enable the port. Uncheck the box to disable the port.
Note: Refer to the on-screen illustration for the location of the FXO ports, where you can connect to your
analog phone service. You can position your mouse pointer over the pointer icon to view the picture at a
larger size.
• Label: Keep the default description, or click the pencil icon to enter a description. For example,
type the published phone number, without punctuation or spaces. This label will appear on the
phone screen as a default label for inbound calls, unless another CLID is provided by the
Central Office. It also will identify any Shared FXO Line buttons that you configure for this trunk.
Notes:
• The Label field is available only if the port is enabled.
• After you edit the description, you can click the Restore icon to restore the default value.
Troubleshooting Tools for FXO Trunks
These tools are available after you enable at least one FXO port and apply your configuration.
• Adjust FXO Gain: Use this tool if you experience volume issues on an FXO trunk.
• FXO Impedance Matching: Use this tool if you experience audio quality issues, such as echo or
clipping, with an FXO trunk.

Adjust FXO Gain

Click the Adjust FXO Gain button to adjust the gain (volume) for each FXO port, as needed. It is usually
necessary to make only minor adjustments.
Caution: Improper settings can cause voice quality issues that may include noise, signal misdetection,
and distortion.
Note: Refer to the on-screen illustration for the location of the FXO ports, where you can connect your
FXO (analog) phone lines. You can position your mouse pointer over the pointer icon to view the picture
at a larger size.
• Transmit (dB): Drag the slider left to reduce the volume of the transmitted audio on the specified
port. Drag the slider right to increase the volume.
• Receive (dB): Drag the slider left to reduce the volume of the received audio on the specified
port. Drag the slider right to increase the volume.
19