Introduction

Use the SIP Gateway Port-Level-Configuration window to configure options at the FXO-port level. The window lists the FXO ports along with the following status information for each port.

Parameter Description
Port-Level-configThe number of the FXO port.
Admin-StateThe administrative state of the port. Until it is configured, the port appears as disabled. Once it is configured, it is enabled and shows a green check mark.
Call-StateUntil it is configured, the call-state is "unavailable." Once it is enabled, the call-state appears as onhook, offhook, or in-call. 

To configure the settings for a specific FXO port, click on the arrow to the left of an FXO port number. The window expands to show the options for the selected port.

Use the following table to review information on the configuration options.

ParameterDescription

FXO-Port

A read-only field identifying the number of the FXS port you are configuring.

Enable-FXO-Port

Set this option to True to enable the FXO/Line port for incoming and outgoing calls.

Two-Stage-Dialing-From-IP

Set this option to True to enable two-stage dialing for incoming calls from the IP network. Default is False

Two-Stage-Dialing-From-PSTN

Set this option to True to enable 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. The options are True and False. Default is False.

Forward-To

If Two-Stage-Dialing-From-PSTN is not enabled, enter a name or number to which you want to automatically forward incoming calls from the PSTN.

PSTN-Incoming-Accept-Method

Select which type of condition enables a connection for calls from the PSTN to the IP network: 

CallerID Detection - connect a call if caller ID is detected.

Ring Detected Counts - connect the call to IP using a simple ring detect.

Default is CallerID Detection. 

PSTN-Accept-Ring-Counts

If Ring Detected Counts is selected as the PSTN incoming accept method, enter the number of rings to detect before connecting to the IP network. The range is 2 to 8.

Tx-Gain

Choose the Analog Transmit gain to control the gain of the media signal coming to FXO from the IP side. 

Range is -16dB to 16dB. Default is 0db.

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

Rx-Gain

Choose the Analog Receive gain to control the gain of the media signal coming to FXO from the PSTN side. Based on the line conditions, the level of the DTMF signal sometimes needs to be boosted to make DTMF detection more reliable. Range is -16dB to 16dB. Default is 0dB.