Getting started with Zentrunk

Overview

Zentrunk is Plivo’s SIP Trunking service that provides global coverage for your outbound voice calls. Zentrunk works with your current cloud or on-premise communications infrastructure.

Before you get started, you will need to have the following:

  • A Plivo account - Click here to signup for free.
  • IP-PBX or SBC with an internet connection. For more information, see our interconnection guides.

Create an Outbound Trunk

In order to use Zentrunk to terminate calls, you would need to do the following configuration on Plivo Console:

  1. Set up authentication for your Trunk
  2. Create a Trunk

Setting up Authentication for your Trunk

Authentication of your Trunk ensures that Zentrunk only accepts traffic sent securely by your infrastructure. You can configure your trunk to be authenticated with an IP Group or an Auth Group, or both.

Creating a Trunk IP Group

IP Group is a list of IPs addresses from which your trunk can accept traffic. It is configured as a comma-separated list of IP addresses or an address block with CIDR notation that needs to be whitelisted. The IP Group should contain the public IP address of your machine that runs your PBX.

To create a Trunk IP Group:

  1. Login to your Plivo account, and then click Zentrunk on the Products navigation bar.
  2. On the Trunks page, click the IP Group tab, and then click Create New Group.
  3. On the Create IP Group window, enter a name for your IP Group (for example, TestACL), and then enter the IP addresses to be whitelisted in the IP Address List field. Note: You can add multiple IP addresses separated by a comma.
  4. Click Create IP Group to save and add your IP Group image alt text

Creating a Trunk Auth Group

Auth Group is a set of Credentials for a trunk. To create a Trunk Auth Group:

  1. On the Trunks page, click the Auth Group tab, and then click Create Auth Group.
  2. On the Create Auth Group window, enter a name for your Auth Group (for example, TestAuthGroup), and then configure the Username and Password.
  3. Click Create Auth Group to save and add your Auth Group. image alt text

Creating a Trunk

To create a Trunk:

  1. On the Trunks page, click the Outbound Trunk tab, and then click Create New Trunk.
  2. On the Create New Trunk window, enter a name for your trunk (for example, Plivo Test).
  3. From the IP Group drop-down list, select the IP Group created in Step1 (TestACL).
  4. From the Auth Group drop-down list, select the Auth Group created in Step2 (TestAuthGroup). image alt text
    Note: The Enabled checkbox is selected by default.
  5. Click Create Trunk. Your first trunk has been created.

Create an Inbound Trunk

Creating a Trunk

To create a Trunk:

  1. On the Trunks page, click the Inbound Trunk tab, and then click Create New Inbound Trunk.
  2. On the Create New Trunk window, enter a name for your trunk (for example, Plivo SIP Trunk).
  3. Enter the Primary URI and Fallback URI of your PBX. image alt text
    Note: The Enabled checkbox is selected by default.
  4. Click Create Trunk. Your first trunk has been created.

Assigning an inbound trunk to a Phone Number

Once you have created and configured your Inbound trunk, assign the inbound trunk to a Phone number. To assign an Inbound Trunk

  1. On the Product Navigation bar, click PHONE NUMBER.
  2. On the Numbers page, under YOUR NUMBERS, click the phone number you wish to use for the Inbound Trunk.
  3. In the EDIT NUMBERS window, select Zentrunk from the APP TYPE list.
  4. From the Trunk list, select the Trunk you wish to use with the phone number, and then click UPDATE. image alt text

To know more about buying a Plivo Phone number, please navigate to the Buy a number section.

List of IPs to whitelist

You may need to whitelist Plivo IPs in your firewall to ensure that calls get routed without interruption. Please ensure that you whitelist all the IPs mentioned as the calls might get routed through a different region in an unlikely event of service disruption in a specific region.

The following are the list of IP addresses that you would need to whitelist.

Regions IP Addresses Signalling Ports Media Ports
North California, USA 13.52.9.0/25 5060 (UDP/TCP)
5061 (TLS) 		10000 - 30000 (UDP/TCP)
Virginia, USA 18.214.109.128/25 18.215.142.0/26 5060 (UDP/TCP)
5061 (TLS) 		10000 - 30000 (UDP/TCP)
Frankfurt, Germany 3.120.121.128/26 5060 (UDP/TCP)
5061 (TLS) 		10000 - 30000 (UDP/TCP)
Sao Paulo, Brazil 18.228.70.64/26 5060 (UDP/TCP)
5061 (TLS) 		10000 - 30000 (UDP/TCP)
Sydney, Australia 13.238.202.192/26 5060 (UDP/TCP)
5061 (TLS) 		10000 - 30000 (UDP/TCP)
Singapore 18.136.1.128/26 5060 (UDP/TCP)
5061 (TLS) 		10000 - 30000 (UDP/TCP)