Creating SMS HTTP OUT Trunk

Outbound SMS traffic is delivered via DIDWW’s high-capacity, global platform, directly peered with a range of selected incumbent local exchange carriers. Configuration, management and monitoring of outbound SMS trunks is available through the DIDWW User Panel.

Step 1. Under the “Trunks” section, select the “SMS” tab, navigate to “Create New”, and click on “HTTP OUT” (Fig. 1).


Fig. 1. Adding a new HTTP OUT SMS Trunk

Step 2. You will be prompted to enter your HTTP OUT SMS Trunk details (Fig. 2):


  • Friendly name - The friendly name of the trunk.

  • Callback URL - The server’s address for posting SMS delivery notifications.

  • Allowed IP addresses - IP addresses from which access to the API is allowed in the format (IPv4|IPv6)[/mask].


After you allow an IP address(es), you can only access the API, if you are connecting from the allowed IP address. Any access attempts from other IPs will be blocked. This is a security tool that you can use to help prevent malicious activity on your account.

Details on Allowing an IP Address section of Outgoing SMS documentation


Fig. 2 Outbound SMS Trunk configuration window

Source Address Settings

The Source Address Settings defines which DID number(s) may be used as a sender ID for the outbound SMS trunk. These DID numbers appear as the CLI to the recipient of the SMS. The “allowed” sender IDs may be selected from the available DID numbers acquired from DIDWW. A filter is provided to enable users to list specific DIDs. By default, all DID numbers with SMS OUT capability in the customer’s account may be used as the sender ID on outbound trunks (Fig. 3).


Fig. 3 Source address selection

Once the outbound SMS trunk has been created, the credentials for that trunk may be viewed by clicking on the “Key” icon under the Credentials tab (Fig. 4).


Fig. 4 Viewing the trunk credentials

The “Share” button allows the user to send these SMS credentials to a system administrator for configuration of the SMS OUT Trunk (Fig. 5). There is an option to view or regenerate the SMS OUT trunk password by clicking on the icons next to the Password field.


Fig. 5 Sharing outbound SMS trunk credentials