---
title: "Vonage SIP trunk"
description: "Connect a Vonage number using the SIP Dashboard."
url: "https://documentation.verbatik.com/deploy/sip-vonage/"
---

# Vonage SIP trunk

Connect a Vonage number using the SIP Dashboard.

Create a SIP trunk in the Vonage developer dashboard and route the number to Verbatik. Review existing number routing before making changes.

## Configure Vonage

1. Open **Voice → SIP** in the Vonage developer dashboard.
2. Start the trunk wizard and choose the suitable custom/“Something else” connection path.
3. Save the generated SIP domain and trunk authentication credentials.
4. Under **Outbound Calling**, select the regional termination endpoint and configure digest authentication or an appropriate IP allowlist.
5. Under **Inbound Calling**, add the Verbatik inbound SIP URI from [SIP setup](/deploy/sip), with matching transport.
6. Link the Vonage number to the trunk. This can replace the number’s previous application or domain route, so retain its prior settings for rollback.

## Configure Verbatik

1. Open **Phone numbers → Connect to your number via SIP trunking**.
2. Choose **Vonage** and enter the number in E.164 format.
3. Use your regional Vonage domain as **Termination URI**, for example `sip:your-domain.sip-us.vonage.com`.
4. Enter the credentials managed on the SIP trunk. Do not assume the Vonage account API key and secret are the current trunk credentials.
5. In **Additional settings**, add Vonage’s current signaling CIDRs and match codecs and transport. Configure registration only if the particular trunk requires it.
6. Save and select a published voice agent.

## Validate the route

Use a number you control to verify inbound calls, caller ID, two-way audio and clean hangup. Test the staff transfer and a no-answer recovery case. Check outbound destinations separately when outbound calling is enabled. A successful SIP OPTIONS result is only a signaling check.

Vonage remains the carrier and bills its telephony usage. SIP does not move SMS routing or port the number. Use [Vonage SIP Dashboard documentation](https://developer.vonage.com/en/sip/sip-dashboard) and [technical details](https://developer.vonage.com/en/sip/technical-details) for current carrier settings.