Connect Google Voice to a Telecom Provider

Google Workspace is a complete suite of productivity and collaboration tools. Google Voice extends those collaboration capabilities by enabling office phone system/ PBX services to be delivered as an element of Workspace, eliminating the need to acquire, deploy and maintain a separate business phone system.

Google Voice SIP Link makes it easy for organizations to choose their own telecom provider for Google Voice. Ribbon Session Border Controllers (SBCs) are deployed locally or in the cloud to provide a voice firewall between an organization’s network, their preferred telecom provider, and Google Voice.  Ribbon SBCs provide robust security services and simplify interoperability, leveraging two decades of real-world experience deploying tens of thousands of SBC devices/instances across the globe.

Ribbon’s Google-certified SBCs enable organizations to connect Google Workspace to their choice of service providers, enabling global roll-outs of Google Voice for Workspace. Ribbon SBCs can be deployed in Google Cloud Platform (GCP), AWS, or Azure, as virtualized software, or as traditional hardware-based appliances.  Visit Ribbon's Interoperability Guide and select "Google Voice" under UC Applications to get detailed documentation on our combined solution. 


Contact Ribbon to Get Started

Getting Started with Google Voice SIP Link

Getting started is as easy as 1, 2, 3:

  1. Acquire a Google Workspace license with Google Voice enabled.
  2. Select a telecom provider that offers SIP trunks for Google Voice. The telecom provider’s SIP trunks will be delivered to a Ribbon SBC deployed in the organization’s office, data center, or in the cloud.
  3. Ribbon’s Session Border Controller will terminate the SIP Trunks and then forward them to the Google Cloud. The SBC acts as a secure voice firewall, mitigates SIP interoperability issues and manages media connectivity. Most of Ribbon’s SBCs are SIP Link certified (see chart below)

From Headquarter to Branch Offices

Superior Security and Performance


Ribbon SBC SBC 1000 SBC 2000 SBC SWe Edge SBC 5400 SBC 7000 SBC SWe

Session Count (concurrent calls)






Server     Dependent

Google Certified

T1/E1/ or BRI Ports (connects legacy PBXs)

Up to 2 T1/E1
or 12 BRI ports

Up to 16 T1/E1 – 2 x 8 T1/E1 spans

Local gateway required

Local gateway required

Local gateway required

Local gateway required

FXS Ports (analog phones, fax, etc.)

Up to 24 FXS ports

Up to 48 FXS ports
– 2 x 24 ports

Local gateway required

Local gateway required

Local gateway required

Local gateway required

FXO Ports (analog lines for emergency calling, etc.)

Up to 12 FXS ports

Local gateway required

Local gateway required

Local gateway required

Local gateway required

Local gateway required


More on SBC 1000

More on SBC 2000

More on SBC SWe Edge

More on SBC 5400

More on SBC 7000

More on SBC SWe

What is the SBC’s Role in Google Voice SIP Link?

Google SIP Link requires a Google-certified SBC to act as a bridge between Google Voice and an organization’s telecom provider. The session border controller provides multiple functions:

  • Security – it acts as a voice-aware firewall, protecting the voice traffic itself and it prevents bad actors from entering the data network via the voice network
  • Interoperability – Ribbon’s SBCs can adjust key deployment parameters to best match your telecom provider’s requirements, making SIP Link setup easy and trouble-free
  • Legacy Connectivity – many organizations still have analog phones, elevator phones, door phones, and fax machines. Ribbon’s hardware-based SBCs have analog ports (FXS and FXO) to keep these assets connected and available.
  • Migration – organizations may have technical or business requirements that require the old PBX to stay connected for an extended period. Ribbon SBCs can provide SIP forking and simultaneous ringing so that both Google Voice and the legacy PBX share connectivity.
  • Resiliency or Failover – Ribbon SBCs have multiple options to manage disruptions in service depending on the deployment model. These tools can keep your organization connected even if the unexpected happens.

Google SIP Link Bring Your Own Carrier (BYOC) Deployment Model with a Ribbon SBC

Google Voice Link SBC Diagram

Proven Professional Services Organization

Ribbon has decades of experience building session border controllers for the world’s largest carriers. That’s why Ribbon understands the importance of reliability and efficiency. Our software and hardware are designed to be operational 24/7, even during upgrades. Ribbon SBCs have undergone rigorous 3rd party testing to prove they can withstand withering attacks while continuing to protect the network.

It’s no surprise that the largest financial institutions, governments, utilities, healthcare organizations, universities and more, trust Ribbon. We’ve helped organizations of all sizes, in more than 140 countries, move to the cloud. We can help you too.