Expand the Call rules and Admin sections in Internet SIP Trunk to transform inbound and outbound numbers, restrict international dialing with a Country Whitelist, and grant trunk management access to administrators.

Prerequisites

Make sure you have Organization Owner or assigned Trunk Admin permissions for the Internet SIP Trunk you want to manage.

Configure Inbound and Outbound Call Rules

In the Call rules section, switch between Inbound and Outbound directions:

Inbound Rules (Caller or Callee)

Inbound rules transform the incoming Caller (ANI) or Callee (DNIS) number before the SIP INVITE is delivered to your PBX:

1. Select Direction: Inbound, then choose Caller or Callee.
2. Select Add and define the matching and transformation criteria:

• Starts with and Number length
• Digits to remove (and optional removal of the leading + sign)
• Add prefix

1. Enter a test phone number in the Sample number field to preview the transformed result live before selecting Save.

Outbound Rules (Dial Plans)

Outbound dial plans transform the destination number dialed by your PBX users before routing to the PSTN:

1. Select Direction: Outbound (Dial Plans).
2. Toggle Auto append "+" sign on or off as needed.
3. Select Import (to import default dial-plan rules for your country) or select Add to create a custom rule in the Match / Transform / Example table:

• Enter Starts with, Number length, Digits to remove, and Add prefix.
• Stripping leading digits without appending: You can leave Add prefix blank ("") when you only want to strip leading digits (for example, stripping an international 00 prefix without appending replacement digits).

1. Test with a sample number in the live preview field and select Save.

Restrict International Destinations (Country Whitelist)

Below the dial-plan table in the Call rules section, the Country Whitelist table (Location, Country code, Area code) controls which countries your trunk is permitted to call:

1. New trunks automatically import default dial plans and allowed countries based on your organization's country code.
2. To permit outbound calls to an additional country, add the Location / Country code (and optional Area code) to the Country Whitelist table.
3. Outbound calls to any country not listed in your Country Whitelist are blocked automatically.

Assign Trunk Administrators

Expand the Admin section at the bottom of the trunk page to control which administrators in your organization can view and manage this trunk:

1. Use the search box to filter currently assigned administrators by Name or Email address (shows No member if none are assigned yet).
2. Select Invite Admin to open the member selection dialog.
3. Select the administrator's name from your organization list and select Invite.

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