A1ROUTES Blog

Configuring A1ROUTES SIP Trunk with Elevenlabs

Feb 5 · 2 min read

Configure A1ROUTES SIP Trunk in ElevenLabs (Outbound Calls)
Prerequisites

Active A1ROUTES SIP Trunk

SIP credentials from A1ROUTES (IP / domain, username, password)

ElevenLabs account with Telephony / SIP enabled

One DID bought from A1ROUTES

Step 1: Log in to ElevenLabs Dashboard

Go to the ElevenLabs dashboard

Open Phone Numbers from the left menu under Deploy

Select From SIP Trunk from Import Number button

Step 2: Create a New SIP Trunk

Click From SIP Trunk

Enter appropriate name in Label field

Enter your DID number bought from A1ROUTES in Phone number field

There is nothing much to do inbound configuration.

Step 3: Outbound Configuration

Fill the SIP configuration as follows:

Use the following SIP configuration values:

Address: sip.a1routes.com or the host provided by A1ROUTES
Transport: TLS or TCP
SIP Trunk Username: sipusername@domain.com
SIP Trunk Password: your A1ROUTES SIP password
Port: 5060

Port: 5060 (unless specified otherwise)

Save the trunk. by clicking Import button at the bottom.

Step 4: Set Outbound Caller ID

Go to Outbound Settings

Set Caller ID / From Number

Use your A1ROUTES DID

Or a verified number

Enable Send From Header

Step 5: Assign SIP Trunk to an Agent or App

Edit the phone number just got imported in ElevenLabs by clicking on phonenumber

Select Agent from the drop down menu

Step 6: Test Outbound Call

Initiate an outbound call from ElevenLabs

Dial an external number (mobile or PSTN)

Confirm:

Call connects

Audio is clear

Caller ID is correct

Common Issues and Fixes

Call not connecting→ Verify SIP username and password

401 Unauthorized→ Verify SIP username and password

Conclusion

Your A1ROUTES SIP trunk is now successfully configured with ElevenLabs for outbound calling.This setup allows reliable PSTN breakout with low latency and competitive rates.