Overview
Custom SIP trunk integration allows you to bring your own phone numbers from external SIP providers to telli.Custom SIP trunks work alongside telli-provided numbers. Use both or either based on your needs.
Configuration
To configure a custom SIP trunk, you’ll need:| Field | Description | Example |
|---|---|---|
| Phone Number | Your phone number in E.164 format | +14155551234 |
| Termination URI | SIP server endpoint | pstn.provider.com |
| Auth Username | SIP authentication username | user123 |
| Auth Password | SIP authentication password | securepass456 |
Do not include the
sip: protocol prefix in the Termination URI. Use only the hostname or IP address.Adding a Custom SIP Trunk
1
Navigate to Phone Numbers
Go to the Phone Numbers section in your telli dashboard
2
Click Add Custom SIP Trunk
Click the Add Custom SIP Trunk button
3
Enter Configuration
Fill in your phone number and SIP credentials
4
Save and Test
Click Add SIP Trunk and test with a call
Provider Examples
Twilio Elastic SIP Trunking
1
Create Elastic SIP Trunk
Create a new Elastic SIP Trunk in Twilio Console
2
Note Termination URI
- US:
your-trunk.pstn.twilio.com - EU:
your-trunk.pstn.frankfurt.twilio.com
3
Create Credentials
Under Authentication > Credentials, create and note username/password
4
Add to telli
Enter the termination URI and credentials in telli
Telnyx
1
Create SIP Connection
Create a SIP connection in your Telnyx portal
2
Set up Credentials
Configure credential-based authentication
3
Add to telli
- Termination URI:
sip.telnyx.com - Use your Telnyx credentials