Where do I configure SIP trunks and what data do I need to enter?

🔹 Start with project setup

To work with SIP trunks in BAS-IP Link, make sure the basics are in place:

• create the group structure: building → units → floors → apartments;

• activate the Plus license;

• add users and assign them to groups.

🔹 Get ready before adding a trunk

Before configuring SIP trunks in Link, make sure everything is set up on the provider side — Twilio.

You’ll need to collect 4 key values:

• Termination URI — from your Elastic SIP Trunk;

• Outgoing number — the phone number you purchased;

• Login — your SIP credential username;

• Password — your SIP credential password.

To get these values, complete the following steps in Twilio:

• buy a phone number with voice support according to Twilio pricing;

• create an Elastic SIP Trunk;

• add the required IP addresses — your server’s external IP, and internal IP if behind NAT;

• create login and password credentials;

• attach the phone number to the trunk.

🔹 Finish setup in Link

Once the values are ready, go to Telephony settings → SIP Trunks tab in the admin interface and click the ➕ icon.

Fill in the following fields:

• Name — a label for internal reference (e.g. Twilio – Main Entrance);

• Termination URI — copied from your SIP provider;

• Outgoing number — the number assigned to the trunk;

• Login / Password — your Twilio SIP credentials;

• Groups — select the group(s) that will use this trunk.

👉 Read more in the SIP trunk configuration guide.