---
title: "How do I set up Groundwire with Vonage?"
topic: "SIP Providers"
updated: 2026-05-09
canonical: https://acrobits.net/resources/knowledge-base/how-do-i-set-up-groundwire-with-vonage/
summary: "Groundwire works cleanly with Vonage Business and Vonage SIP Trunking — Vonage Home is the only plan that's a no-go. Also: is Groundwire secure? and best app for making and receiving calls with a SIP account."
---

# How do I set up Groundwire with Vonage?

> Groundwire works cleanly with Vonage Business and Vonage SIP Trunking — Vonage Home is the only plan that's a no-go. Also: is Groundwire secure? and best app for making and receiving calls with a SIP account.

[**Groundwire**](/sip-client-ios-android/) connects to a Vonage Business Communications number through a SIP trunk on the Vonage side. Vonage's consumer / Vonage Box service does not expose SIP credentials — this guide is for **Vonage Business Communications (VBC)** and **Vonage SIP Trunking**, where customers can register a third-party SIP device.

## 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. 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

  - 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 most regions)

      - **Authentication:** Digest with 407 challenge — Groundwire handles this 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 — Codecs and advanced features

Vonage supports a wide codec set; Groundwire matches all of them: PCMA (G.711a), PCMU (G.711u), iLBC, G.729, G.722, and Speex16. Recommended config:

  - **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 — Vonage requires both for stable long calls and reliable IVR navigation.

## Step 4 — Test inbound and outbound

  - 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 should ring even with the app closed (SIPIS push).

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

## Why Groundwire is a good fit for Vonage

  - **Full Vonage codec coverage** — including iLBC and Speex16, which most softphones omit.

  - **TLS 1.2+ and SRTP** — required by Vonage's modern SIP infrastructure.

  - **SIPIS push** — phone rings when 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; Groundwire formats correctly out of the box.

## Troubleshooting

  - **403 Forbidden on register** — 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** — caller ID is not in E.164 format. Set the From header to +E164@server.

  - **One-way audio** — enable SRTP and confirm Vonage endpoint is set to require encrypted media.

  - **Long calls drop at 30 minutes** — enable session timers (RFC 4028).

## Bottom line

Groundwire works cleanly with Vonage Business and Vonage SIP Trunking — Vonage Home is the only plan that's a no-go. 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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