- Choose VoIP > SIP >SIP UA > Advanced.
Scroll to Port Level Advanced Configuration.
Configure settings using the information in the following table as a guide.
FXS/Phone Port Settings - Advanced
Item Description Port Level Advanced Configuration
Configures parameters for each port.
Port 1 Configuration Codec Preference
Select a codec from the drop down list if a setting other than the globally configured one is desired. This may be useful for cases such as when a fax machine is connected to the port.
When making or receiving a call, if that codec is part of the negotiated codec list, then that codec is used to encode and send voice packets. Select the Global setting to use the Global codec preference at port level (default).
Use preferred codec only
Select the Use preferred codec only checkbox to specify that only the preferred codec is used when the FXS places a call. If an incoming call does not have the preferred codec, the call is rejected.
This setting does not apply if the preferred codec is set to Global Setting.
Domain Enter a domain in this field to use a value other than the domain configured on the main SIP configuration page. Outbound Proxy Server IP
Enter the IP address of the outbound proxy server to have calls from this FXS port to use a server other than what is configured under SIP configuration. Outbound Proxy Server Port
Enter the outbound proxy server port that SIP UA uses to register each FXS port and make outbound calls. Each FXS port can use different outgoing proxy and domain for SIP signaling. This field is blank by default to use global configuration.
If VoIP-ALG is enabled, the outbound proxy must point to the VOIP ALG LAN interface.
TX gain to analog device
Choose the analog transmit gain for the FXS port. The default setting of 0dB is appropriate for most installations; however, you can adjust the setting to interoperate with user endpoints such as phones, fax, or key systems. Range is -16dB to 16dB, default is 0dB.
RX gain from analog device
Choose the analog receive gain for the FXS port. The default setting of 0dB is appropriate for most installations; however, you can adjust the setting to interoperate with user endpoints such as phones, fax, or key systems. Range is -16dB to 16dB, default is 0dB.
Member of Hunt Group
Select the Member of Hunt Group checkbox to enable the associated FXS port to answer incoming calls that are placed to the hunt group from an IP network. If the port is busy or the call has comes to a hunt group DID, ports in the group are picked up in a round-robin scheme from first port in the group to port N in the group. When no FXS port is free in the pool to receive the call, a “486 Busy” is sent. A single hunt group is supported on an EdgeMarc. See also Serial Hunt in B2BUA configuration for additional options.
Enable Call Waiting
Select the Enable Call Waiting checkbox to enable call waiting at the port level. If call waiting is enabled globally, it is enabled at port level as well. Call waiting can be disabled globally and enabled at port level. Enable Call Waiting CallerID
Select the Enable Call Waiting CallerID checkbox to enable call-waiting caller-ID feature at port level. If feature is enabled globally, it is enabled at port level as well. However this feature can be disabled globally and enabled at port level.
VAD Enable Choose voice activity detection for the FXS port:
• On
• Off
• Global Setting—Allows global VAD settings to be applied at the port level.
Hotline Number Enter the number that a port calls automatically when it goes off-hook. If the field is empty, the feature is disabled.
Restrict CallerID Select the Restrict CallerID checkbox to enable endpoint call privacy - user provisioned on the port - in a trusted SIP network (RFC 3325). Caller Identity in From SIP header is restricted and is instead carried in P-Preferred-Identity SIP header. If the endpoint does not trust the proxy that it sends request to, leave the box un-checked.
Disable Flash Hook
Select the Disable Flash Hook checkbox and click Submit to disable Flash Hook on SIPUA FXS Ports.
Click Submit at the bottom of the page to save your changes or click Reset to Defaults at the top of the page.