Skip to main content
Plivo sells SIP trunking under the name Zentrunk. Plivo uses one trunk for inbound calls and a separate trunk for outbound calls, so you create both in Plivo and connect them to a single trunk in Bolna.
This page connects Plivo over a SIP trunk. To connect your Plivo account to Bolna as a telephony provider instead, see Using Plivo.

​
Before you begin

  • A Plivo account and at least one Plivo phone number. For calls to or from Indian numbers, Plivo requires an account in the India data region. See Plivo’s Calling in India.

​
Set up Plivo

1

Create the inbound trunk

In the Plivo Console, open SIP Trunking → Inbound Trunks and click Create New Inbound Trunk. Enter a name, click Add New URI and enter:Click Create Trunk. Plivo sends calls over UDP unless you add ;transport=tcp to the URI; Bolna accepts both. Do not use transport=tls.
2

Route your number to the inbound trunk

Open Phone Numbers → Your Numbers and click your number. Set Application Type to Zentrunk, set Trunk to the inbound trunk and click Update Number.
3

Create the outbound trunk

Open SIP Trunking → Outbound Trunks and click Create New Outbound Trunk. Enter a name, then add one way for Plivo to recognise Bolna:
  • Credentials list: click Add New Credentials List and create a username of 5 to 20 letters and digits, and a password of 5 to 20 characters with at least one of ~!@#$%^&*()_+. Save both; you enter them in Bolna.
  • IP access control list: create one with Bolna’s signalling IPs 15.252.21.46 and 13.206.230.198.
Leave Secure Trunking off: Bolna’s SIP trunks use UDP or TCP, not TLS. Click Create Trunk and copy the Termination SIP Domain, for example XXXXXXXXXXXX.zt.plivo.com.

​
Create the trunk in Bolna

1

Pick Plivo

In the sidebar, under Deploy, open SIP Trunks and click Create trunk. If your account still has legacy SIP trunks, click Open new SIP trunks first. On the Provider step, pick Plivo, enter a Trunk name and the number of Channels, and paste the Termination SIP Domain into Gateway we dial. Click Continue.
2

Check Plivo's IPs and add credentials

On the Carrier IPs step, the Plivo preset already lists the signalling IP ranges Plivo publishes. Keep all of them: Plivo can route a call through another region during an outage.If you created a credentials list, enter its Username and Password under Carrier credentials (optional). Click Continue.
3

Add your Plivo numbers

On the Numbers step, enter each Plivo number in E.164 format, for example +91XXXXXXXXXX, and click Add. Click Continue, check the summary and click Create trunk.
The caller ID on an outbound call must be a Plivo number; Plivo rejects any other number with hangup code 4190. For every field on these steps, see Connect your carrier.

​
Assign an agent and test

  • Inbound: open the trunk’s Numbers tab and, in the Agent column, pick an agent for your Plivo number. Then call the number. See Receive inbound calls.
  • Outbound: on the agent’s Calling tab, set Telephony Provider to SIP Trunk. In the agent’s outbound call dialog, pick your Plivo number as the caller ID, enter the number to call and click Place call. See Make outbound calls.
If a call does not connect, see Troubleshooting.