Outbound Trunks - Cisco UC320W Administration Manual

• NAT STUN Server (button): If you enabled NAT mapping for a SIP provider, you can select this
option use a STUN server to discover NAT mapping. This setting applies to all configured SIP
providers with NAT mapping enabled. Not applicable to Mediatrix BRI Gateways.
• NAT STUN Server (text box): Enter the IP address or the hostname of the NAT STUN Server.
Note: This option is available if you enabled NAT mapping for one or more SIP providers. This
setting applies to all SIP trunks.
• Static IP Address for Site (button): Specify the public static IP address that is used for Internet
connections at your site. Note: This option is available if you enabled NAT mapping for one or
more SIP providers. This setting applies to all SIP trunks.
• Static IP Address for Site (text box): Enter the publicly routable static IP address for your site.

Outbound Trunks

Use the Configuration > Ports and Trunks > Outbound
Trunks page to specify the trunks that are selected for
each Outside Line digit in your Internal Dialing plan.
Also choose a trunk to use for emergency calls.
Note: This selection is relevant if you enabled multiple
trunks. If you enabled only FXO trunks, or only one
SIP/BRI service, this page displays the trunk
assignment for the Outside Line digits.
• Outbound Trunk Assignment: Click the button
to show or hide this section. You can assign
one or more trunks to each digit that is used to
get an outside line. You can assign different
trunks to different digits. For example, you may
want your users to press 8 for an FXO trunk and 9 for a SIP/BRI trunk.
• Emergency Calls: Click the button to show or hide this section. Choose a trunk to use for
emergency calls, if supported by your phone service provider. Contact your service provider for
details. If the phone system requires an Outside Line digit for outbound calls, instruct users to
enter that digit before dialing an emergency number. Also obtain any information that users need
to be aware of when placing emergency calls through the trunk. For example, it may be
necessary to specify the site location when calling an emergency number.
Notes:
• Check the box to select a trunk. The order in which you check the boxes is the order in which the
trunks are used. For example if you select an FXO trunk first and a SIP provider second, the SIP
provider is used only when the FXO trunk is busy.
• The FXO group includes all unassigned FXO trunks, meaning those trunks that are not reserved
for Shared FXO Lines (see the Shared FXO Lines page).
• You can change the order of the trunks by dragging a trunk up or down in the list. Alternatively,
uncheck all of the boxes, and then check them in the desired order.
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