1. Choose VoIP > SIP > SIP GW.
  2. Scroll to Port 1 Configuration.
  3. Configure settings using the information in the following table as a guide.

    SIP FXO/Line Port Configuration Fields

    ItemDescription

    Port Configuration Settings

    Sets parameters for Port 1 and Port 2.

    Enable FXO Port

    Select the Enable FXO port checkbox to enable the FXO/Line port for incoming and outgoing calls.

    When this field is not checked, the FXO/Line port is disabled.

    TX gain to analog device

    Choose the Analog Transmit gain. Adjusts the gain to optimize echo cancellation in a call. Default is 0db.

    Note: In cases where the default value does not optimize echo cancellation, adjust the gain with -6DB in steps to -10DB until echo is gone.

    RX gain from analog device

    Choose the Analog Receive gain. Adjusts the gain to optimize DTMF detection coming from the PSTN. Based on the line conditions, sometimes level of DTMF signal needs to be boosted to make DTMF detection more reliable. Default is 0DB.

    Enable InBound (from IP Network) two stage dialing

    Select the Enable InBound (from IP network) two stage dialing checkbox to allow two-stage dialing for incoming calls from the IP network.

    Enable InBound (from PSTN) two stage dialing

    Select Enable InBound (from PSTN) two stage dialing to allow two-stage dialing for incoming calls from the PSTN.

    Provides dial tone when a call is answered. The caller can then dial an extension to further complete the call or hang up.

    Forwarded toIf the Enable InBound (from PSTN) two stage dialing checkbox is not selected, enter a name or number in the Forward to field to automatically forward incoming calls from the PSTN to this name or number.

  4. Click Submit to save all settings on the SIP FXO/Line Port Configuration page.

    Note

    Refer to Configure the Network Side ISDN PRI (PRI/UA) to configure the Network Side ISDN PRI (PRI/UA).