Configuring 3CX for Spitfire SIP Trunks

This document is a guideline for configuring Spitfire SIP trunks onto a 3CX which includes the settings required for Inbound DDI routing and Outbound CLI presentation. The settings contained within have been tested and are known to work at the time of testing. SIP trunk details such as account number and password will be provided separately. Provisioning a trunk during initial 3CX installation: Page 2 Provisioning a trunk after 3CX installation: Page 5 Inbound DDI’s Reference: Page 17 Outbound CLI Reference: Page 18 This guide is based on using the VOIP Provider Wizard to provision Spitfire’s SIP trunks on a 3CX. You can provision a trunk manually, but there are many settings to change that the Wizard will do automatically – it is HIGHLY recommend that you use the Wizard. Please note that 3CX versions prior to V9.15536 may not have the correct details in the VoIP Provider wizard, or may not have the template at all. I would recommend that all installations use the latest version of software for ease of provisioning. If your 3CX installation is located behind a NAT’ed router, please pay attention to the STUN and VoIP Provider capabilities on pages 5&6 or 16&17.

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Provisioning a trunk during initial 3CX installation:

1. During the installation of the 3CX you will be asked to configure a VoIP gateway/Provider. Select Spitfire & Next

2. The Wizard will automatically enter the server and proxy details

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3. Enter the SIP Trunk details as below. Please note that @spitfiretsp.net is NOT entered after the username. This is not required as spitfiretsp.net is automatically appended to the username by the 3CX

4. Also note that the External Number does not have 44 pre-pended. This is the default CLI sent to line if the extensions do not have their own individual CLI set.

5. You are next asked for the dialing rules. The dialing rules are down to the installer, the screenshot

below is for reference only and not a very good dialing plan!

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6. The installation is finalized.

7. After finishing the SIP trunk setup you can check the status of the SIP trunk.

a. Select Ports/Trunks Status in the 3CX admin tool or web page b. Green is for registered, Red not registered and amber for on call.

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Edit VOIP Provider Open VoIP Providers and select the Spitfire SIP trunk. Change the Time between registration to a minimum of 300 and a maximum of 3600 Remove the G729 codec from the Assigned Codecs and apply.

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STUN If your 3CX is behind a NAT’ed router ensure you switch OFF the STUN server. Change the “Public IP to specify in Contact and SDP” to the private address seen in the “Select Network card Interface” beneath – i.e. the IP address of the 3CX server. Specifying your external IP address in the Contact and SDP headers can lead to 1 way audio and problems presenting calls to the 3CX. Once you OK these settings you will be asked to restart the 3CX services. In the unlikely event that you are not prompted to restart the 3CX services, please go to Services Status (in the 3CX admin tool) and select Restart All.

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Provisioning a trunk after 3CX installation:

The 3CX management interface can be access via the Management tool, or via a web browser at http://ipaddress:5481 If the 3CX in question is V9.15536 or above the template will be included in the system and you can run the VoIP Provider Wizard immediately. If the 3CX is lower than V9.15536 you will need to copy the template onto the host server before starting the VoIP Provider Wizard. To install the Spitfire Template (if required): Unzip the template to the following locations: Windows XP or Windows 2003: C:\Documents and Settings\All Users\Application Data \3CX\Data\Http\templates\provider.

Windows Vista or Windows 2008: C:\ProgramData\3CX\Data\Http\templates\provider.

The Provider template will now be available in the list of providers in the 3CX Web Interface > Add VOIP node.

1. Select Add VoIP Provider Wizard at the top of the 3CX programming tool.

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2. a. Name the Trunk b. Select Spitfire & click next

3. The Wizard will automatically enter the server and proxy details

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4. Enter the SIP Trunk details as below. Please note that you do NOT need to enter @spitfiretsp.net after the username. This is not required as spitfiretsp.net is automatically appended to the username by the 3CX

5. Also note that the External Number does not have 44 pre-pended. This is the default CLI sent to line if the extensions do not have their own individual CLI set.

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6. Enter an Inbound Rule for the trunk. This rule should be determined by the installer, and is for reference only.

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7. Enter an Outbound Rule for the trunk. This rule should be determined by the installer, and is for reference only. Click Finish

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8. You should now be able to see Spitfire SIP Trunks in the VoIP Providers list

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9. After finishing the SIP trunk setup you can check the status of the SIP trunk. a. Select Ports/Trunks Status in the 3CX admin tool or web page b. Green is for registered, Red not registered and Amber for on call.

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Edit VOIP Provider Open VoIP Providers and select the Spitfire SIP trunk. Change the Time between registration to a minimum of 300 and a maximum of 3600 Remove the G729 codec from the Assigned Codecs and apply.

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STUN If your 3CX is behind a NAT’ed router ensure you switch OFF the STUN server. Change the “Public IP to specify in Contact and SDP” to the private address seen in the “Select Network card Interface” beneath – i.e. the IP address of the 3CX server. Specifying your external IP address in the Contact and SDP headers can lead to 1 way audio and problems presenting calls to the 3CX. Once you OK these settings you will be asked to restart the 3CX services. In the unlikely event that you are not prompted to restart the 3CX services, please go to Services Status (in the 3CX admin tool) and select Restart All.

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Inbound DDI’s Reference: All incoming DDI’s that are part of the Spitfire SIP trunk need to be assigned to the Spitfire SIP Trunk in the 44xxxxxxxxxx format as shown below.

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Outbound CLI Reference: To enable individual CLI presentation, go to the extension in question and enter the number to be presented in the Outbound Caller ID field on the “Other” tab. Please note that the Outbound CID must be one of the DDI’s associated with the SIP trunk and needs to be entered WITHOUT the leading 44.