Store Locations My GTA Webmail Search

Business phone

Set your business up with a quick and easy telephone service

Choose from one of our business phone options to meet your unique business requirements. Pick a single business line for small business connections or upgrade to a rotary or trunk line for scalability and enhanced communication features.

Unlock the benefits of ISDN

Whether you're a small, growing or large business, Integrated Services Digital Network (ISDN) offers your business a cost-effective solution for enabling voice, digital, data, and other network connections simultaneously on a single line.

Choose between two types of user interfaces—Basic Rate Interface (BRI) and Primary Rate Interface (PRI). If you are running a small business, BRI offers different channels for data transfer and is able to run multiple applications simultaneously. If you're a growing or large business, PRI comes with all the features and functionality you need at a competitive price.

Simple and scalable business communications with VoIP solutions

We understand that your business requires a reliable, integrated, and scalable communication solution to connect your teams, partners, and customers. Whether you are a growing business requiring a flexible voice solution without the need for day-to-day management, or an enterprise with multiple business locations on and off the island looking to converge your voice and data networks, we have a service that meets your business needs.

Deliver an improved customer experience with Hosted PBX

Gain ease of management with Hosted PBX, and eliminate the need to maintain your communication systems. At GTA, we offer you the PBX functionality and routing intelligence you need, residing on the GTA network.

With Hosted PBX, you can enjoy the following key benefits:

  • Upgrade to the latest communications technology easily, with all updates handled by GTA.

  • Scale your communication lines seamlessly within minutes, without phone system constraints or hardware upgrades.

  • Gain access to an array of innovative features and capabilities to enable your business to improve employee productivity while delivering better customer service.

  • Ease of management without the need to maintain hardware or technology on premises. All operations and maintenance of your Hosted PBX system will be performed by GTA.

  • Route calls to any phone, including phones not wired to your Hosted PBX.

A single-source phone systems solution for all your business needs

Gain cost-savings, ease of management, and convenience when you choose GTA as the single vendor for all your business communications needs. Whatever phone system solution and equipment your business requires, we have a service for you. By eliminating multiple vendors, your business can also enjoy a personalized, reliable service.

Check out our SoHo business bundles

You can combine business phone with mobile and internet for greater convenience and savings.

Show me

Why GTA for business?

A network you can trust

Get connected to your customers and prospects faster, seamlessly and securely, with our fully buried, fully owned fiber and copper network.

Work the way you want

We want you to work and collaborate without limits anytime and anywhere, with the connectivity you need to power your business productivity.


We have invested over $70 million in our networks over the past four years—with no plans to stop—to consistently deliver a world-class experience to the businesses of Guam.

Tailored to your ambition and scale

Whatever your ambition and scale, and however you need to connect with your customers and prospects, GTA provides a full range of services specifically tailored to the needs of your island-based business.

Let's get your business connected

Your GTA support

For assistance or to book an appointment in our stores, please contact us. We’re happy to assist you.

Store locations

Book an appointment

Contact support

By phone