Twilio

Twilio is an excellent alternative for connecting to Parloa if you cannot connect via SIP directly from your PBX.

Prerequisites

• Twilio Phone Number – It's recommended to have at least one phone number you intend to use before setting up the SIP trunk.

• Your Custom Subdomain in Parloa – Your subdomain should look like customerId.voip.parloa.com. If you're unsure of your subdomain, you can find it in the Parloa UI:

  1. Navigate to the Deployments tab –> click Add New Release.

     
  2. Select Phone 2, and click Next.

  3. Select Peering / Inbound registration.

  4. Scroll down to the SIP Registrar/Realm Hostname. For example, it might look like sales-engineering.voip.parloa.com.

     

Keep these two pieces of information handy for the next steps.

Step 1 – Set Up the SIP Trunk

1. Start by logging into your Twilio account and navigate to Develop → Elastic SIP Trunking → Manage → Trunks.

2. Click on Create new SIP Trunk.

1. Give your trunk any friendly name, for example, Parloa (since this trunk will point to Parloa’s Infrastructure).

2. In the General settings, at the minimum, we recommend enabling Secure Trunking, Call Transfer (SIP REFER), and Symmetric RTP. Enabling PSTN transfer will depend on your specific use case.

1. Click on Origination.

2. Click on Add new Origination URI. This is where you will need your custom subdomain from the Prerequisites section. The SIP URI should be sip:<your customerID>.voip.parloa.com. For example, it will be sip:[e-mail].

3. Click Add.

4. Go to Numbers.

5. Click Add a number. Here you will associate phone numbers with the SIP trunk.

Once you have added numbers, these numbers will be routed to Parloa. Now we have to configure them in Parloa.

Step 2 – Create the Release in Parloa

Having configured Twilio to route calls to Parloa, you now need to configure Parloa to direct these calls to your bot.

1. Log into Parloa and choose the project you want to connect.

2. Navigate to the Deployments tab → click Add New Release.

   
3. Select Phone 2, and click Next.

4. Select Peering / Inbound registration.

5. Under the authentication method:

   • Whitelisted IPs – Add the Frankfurt Twilio Public IPs.

6. Add the URI: For example, your URI might look like this: [e-mail].

   • The "user" part of the URI (everything before the @) is the Twilio phone number without special characters (+ and whitespace).

   • The "domain" part of the URI (everything after the @) is your custom Parloa subdomain.

   
7. Click Next, adjust any additional settings as needed (we recommend adding the phone number in the description for easier identification), and click Create.

Congratulations! You can now dial the Twilio number, and it will be directed to your bot.