Trunk

Overview

A trunk connects your Virtual-Call Cloud PBX to the public telephone network. All inbound and outbound calls are routed through the trunk.

Virtual-Call provides your trunk pre-configured. You can view the trunk details, check your assigned phone numbers, and configure the caller ID for inbound and outbound calls.

Prerequisites

• Administrator access to the Virtual-Call Cloud PBX

Trunk Overview

Navigate to Extension and Trunk → Trunk.

Columns in the Overview

Column	Description
Status	Connection status of the trunk (green checkmark = registered and active)
Name	Name of the trunk
Type	Connection type (e.g., “Register Trunk”)
Hostname/Port	Address and port of the SIP server
Username	SIP username for registration
Outbound Caller ID	Default phone number transmitted for outbound calls
Operations	Actions: Edit

Viewing Trunk Details

In the Operations column, click to open the detail view. The configuration is divided into several tabs:

Tab: Basic

Shows the basic settings of the trunk:

Tab: DIDs/DDIs

This tab shows all phone numbers (DIDs) assigned to your trunk. These numbers are provided by Virtual-Call and can be used in inbound routes to direct calls to extensions, ring groups, or IVR menus.

Tab: Inbound Caller ID Reformatting

Reformatting rules allow you to automatically adjust incoming caller numbers—for example, to remove country codes or add area codes. This ensures caller numbers appear consistently in your CDR entries and on phone displays.

Adding a Rule

1. Click Add.
2. Configure the fields:
   • Pattern—String to match at the beginning of the incoming number (e.g., 41 for the Swiss country code)
   • Remove—Number of characters to remove from the beginning of the number
   • Prepend—String to add at the front after removal (e.g., 0)
3. Click Confirm.

You can also import and export rules (CSV format) to transfer them between trunks. The order of rules can be adjusted using the arrow icons in the “Move” column—the first matching rule is applied.

Tab: Outbound Caller ID

Configure which phone number and name are transmitted for outbound calls.

General

Outbound Caller ID List

In addition to the default ID, you can create a list of additional caller IDs and assign them to specific extensions. For example, the sales team can use a different number than the support team.

1. Click Add.
2. Configure the fields:
   • Create Method—Select “Shared Outbound Caller ID”
   • Speed Dial Code—Optional code that extensions can use to select this ID via feature code
   • Outbound Caller ID—The phone number to be transmitted
   • Outbound Caller ID Name—The associated name (CNAM)
   • Default DOD Label—Optional label for this caller ID
   • Assigned Extensions—Select extensions from the “Available” list that should use this caller ID and move them to “Selected”
3. Click Confirm.

Best Practices

• Regularly check the trunk status in the overview—a green checkmark confirms an active connection.
• Use reformatting rules for inbound caller IDs so that callbacks from the call log work correctly.
• Assign appropriate outbound caller IDs to departments so that customers see the correct callback number.
• Do not modify settings in the Basic, Advanced, or SIP Headers tabs—these are managed by Virtual-Call.