PSTN Trunk

PSTN trunks allow you to forward incoming calls through Direct Inward Dialing (DID) to the Public Switched Telephone Network (PSTN).

Note

Incoming calls forwarded to a PSTN trunk are charged per minute. The rate and availability depend on the destination PSTN phone number.

Create PSTN Trunk

To create an inbound PSTN trunk, follow these steps:

  1. Navigate to the Voice section in the left-hand menu.

  2. Select Inbound Trunks from the submenu.

  3. Click the Create New button in the top-right corner of the screen.

  4. From the dropdown menu, select PSTN Trunk.

Creating a new PSTN Trunk

Fig. 1. Creating a new PSTN Trunk

Step 1: Configure General Settings & Check Rate

  1. Enter a unique Friendly name to identify the trunk.

  2. In the PSTN phone number field, enter the destination number to which calls will be forwarded.

  3. Set the Capacity limit to Unlimited, or specify the maximum number of simultaneous calls allowed (optional).

  4. In the CLI number list field, assign a Number List to control which Caller ID values may be used when forwarding calls. For more information on creating and managing number lists, see Number List.

Note

Number Lists match against the CLI value sent to the PSTN. If your equipment modifies the CLI (for example, by adding prefixes or formatting changes), ensure your Number List entries match the final CLI presented to the PSTN.

Basic PSTN trunk configuration

Fig. 2. Basic PSTN trunk configuration

Step 2: Review Rate & Create

If the destination is reachable, the Per minute rate card will appear on the right side of the screen.

  1. Review the Per minute rate displayed.

  2. If the rate is acceptable, click Create to finalize the PSTN trunk setup.

  3. After the trunk is created, assign it to your DID number(s). For detailed instructions, see How to Assign the Trunk.

Note

The per-minute rate depends on the destination phone number. For detailed pricing information, contact customer.care@didww.com .

PSTN trunk rate displayed and ready to create

Fig. 3. Per-minute rate displayed and trunk ready to be created

Edit PSTN Trunk

  1. Navigate to the Voice section in the left-hand menu.

  2. Select Inbound Trunks from the submenu.

  3. Locate the PSTN trunk that you want to edit and click the Actions button button.

  4. Click Edit.

  5. Perform the required changes in the Edit Inbound PSTN Trunk window and click Submit to save the configuration.

Actions button to edit a PSTN Trunk

Fig. 4. Actions button

Delete PSTN Trunk(s)

You can either delete a single PSTN trunk or delete multiple PSTN trunks by using batch actions.

Note

Trunks assigned to DID numbers or in use cannot be deleted.

Delete a Single PSTN Trunk

  1. Navigate to the Voice section in the left-hand menu.

  2. Select Inbound Trunks from the submenu.

  3. Locate the PSTN trunk that you want to delete and click the Actions button button.

  4. Click Delete.

  5. In the confirmation pop-up window, click Delete to remove the trunk.

Deleting a single PSTN trunk

Fig. 6. Deleting a single PSTN trunk

Delete Multiple PSTN Trunks

  1. Navigate to the Voice section in the left-hand menu.

  2. Select Inbound Trunks from the submenu.

  3. Select the PSTN trunks you want to delete.

  4. Click Batch Actions and then select Delete Trunk(s).

  5. In the Delete Trunk(s) confirmation pop-up, click Delete to remove the selected trunks that are not assigned to DID numbers.

Deleting PSTN trunks

Fig. 7. Deleting multiple PSTN trunks

Additional Information

Assign trunks to DID numbers

Learn how to configure DID numbers with trunks and trunk groups for routing inbound calls.

Assign Voice Trunk
Create a SIP trunk

Create and configure SIP trunks for inbound calls, set transport protocols, authentication, media options, and more.

SIP Trunk