---
title: "How do I set up Groundwire with Vonage?"
topic: "SIP Providers"
updated: 2026-07-09
canonical: https://acrobits.net/resources/knowledge-base/how-do-i-set-up-groundwire-with-vonage/
summary: "Groundwire connects to Vonage Business Communications (VBC) and Vonage SIP Trunking through a SIP endpoint or SIP trunk on the Vonage side, where customers can register a third-party SIP device. Vonage's consumer service (Vonage Home or Vonage Box) does not appear to expose SIP credentials, so this guide covers the two business plans."
---

# How do I set up Groundwire with Vonage?

> Groundwire connects to Vonage Business Communications (VBC) and Vonage SIP Trunking through a SIP endpoint or SIP trunk on the Vonage side, where customers can register a third-party SIP device. Vonage's consumer service (Vonage Home or Vonage Box) does not appear to expose SIP credentials, so this guide covers the two business plans.

[**Groundwire**](/sip-client-ios-android/) connects to **Vonage Business Communications (VBC)** and **Vonage SIP Trunking** through a SIP endpoint or SIP trunk on the Vonage side, where customers can register a third-party SIP device. Vonage's consumer service (Vonage Home or Vonage Box) does not appear to expose SIP credentials, so this guide covers the two business plans.

## Confirm your Vonage plan supports SIP

  - **Vonage Business Communications (VBC)**: supports SIP device registration via the SIP Endpoint feature. ✓

  - **Vonage SIP Trunking**: designed for SIP devices and PBXs. ✓

  - **Vonage for Home / Vonage Box**: does not expose SIP credentials, so Groundwire cannot connect.

If you're on a consumer plan, see [what VoIP provider should I use with Groundwire](/blog/groundwire/what-voip-provider-should-i-use-with-groundwire/) for SIP-friendly alternatives.

## Step 1: Create a SIP endpoint in Vonage

  - In the Vonage Admin Portal go to **Phone Systems → Devices → Add SIP Device** (VBC) or **SIP Trunking → Endpoints** (Trunking plan).

  - Choose **generic SIP device**.

  - Vonage will provision credentials and a server address in the form yourcompany.sip-us.vonage.com (region varies: sip-eu, sip-ap, etc.).

  - Note the username, password, and server. IP ACL is also supported if you prefer locking by source IP.

## Step 2: Configure Groundwire for Vonage

  - Groundwire → **Settings → Accounts → Add account → Generic SIP**.

  Enter:
    
      - **Server / domain:** yourcompany.sip-us.vonage.com (use your assigned region)

      - **Port:** 5061 for TLS, 5060 for UDP/TCP

      - **Transport:** TLS 1.2+ recommended (Vonage requires TLS for new endpoints in many regions)

      - **Authentication:** Digest with a 407 challenge, which Groundwire handles automatically

      - **Username / password:** from the Vonage SIP Endpoint screen

      - **Caller ID format:** E.164 in the From header (e.g. +14155551212@yourcompany.sip-us.vonage.com); Vonage rejects non-E.164 caller IDs

    
  
  - Save and wait for the green registration indicator.

## Step 3: Set codecs and call features

Vonage supports a codec set that includes PCMA (G.711a), PCMU (G.711u), iLBC, G.729, G.722, and Speex16, and Groundwire supports those codecs. Suggested codec order:

  - **Wi-Fi:** G.722 primary (HD voice), G.711u fallback

  - **Cellular:** G.729 primary (low bandwidth), G.711u fallback

Enable **session timers (RFC 4028)** and **out-of-band DTMF (RFC 4733)** in Groundwire for long calls and IVR navigation.

## Step 4: Test inbound and outbound calls

  - Outbound: dial any number from Groundwire. Confirm Vonage shows the call in the Admin Portal call log.

  - Inbound: call your Vonage number from another phone. Groundwire can ring when the app is closed, using SIPIS push where enabled.

  - Verify caller ID on the receiving end shows your Vonage number, not a stripped-down format.

## What Groundwire supports with Vonage

  - **Vonage codec support** including iLBC and Speex16, which most softphones omit.

  - **TLS 1.2+ and SRTP** for Vonage SIP setups.

  - **SIPIS push**: the phone rings when the app is closed.

  - **One-time $9.99 purchase**: no per-seat softphone subscription on top of your Vonage plan.

  - **E.164 handling**: Vonage's caller ID requirements are strict, and Groundwire formats correctly out of the box.

## Vonage setup troubleshooting

  - **403 forbidden on registration**: wrong region in the SIP server hostname, or IP ACL is blocking your mobile IP. Switch to credential auth or whitelist a range.

  - **Outbound calls fail with 503 response**: caller ID is not in E.164 format. Set the From header to +E164@server.

  - **One-way audio on calls**: enable SRTP and confirm the Vonage endpoint is set to require encrypted media.

  - **Long calls drop after 30 minutes**: enable session timers (RFC 4028).

## Summary for Vonage setup

Groundwire registers against your VBC or Vonage SIP Trunking credentials as a generic SIP device. If you're also using RingCentral alongside Vonage or migrating between them, see [How do I set up Groundwire with RingCentral?](/resources/knowledge-base/how-do-i-set-up-groundwire-with-ringcentral/) for the equivalent setup guide.

**Also worth reading:** [is Groundwire secure?](/resources/knowledge-base/is-groundwire-secure/)

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