GTB provides a combination of IP PBX Phones, cordless phones, and switches that will help you link and manage your voice, internet and data through our network. Take a look at our business phones and additional devices below.

Business Phones

Mitel 6873i

The Mitel 6873 SIP Phone is designed for power users who demand a lot from their phones. The 6873 offers executives a large 7” touchscreen display, support for today’s, and tomorrow’s, high speed networks through dual Gigabit Ethernet ports with embedded Bluetooth and a powered USB port for...

Mitel 6869i

The 6869i SIP phone commands the desktop with its large 4.3” color display, powerful crystal clear HD audio and 12  programmable soft keys. Dual Gigabit Ethernet ports, magnetic   keyboard interface, native DHSG/EHS headset support, and choice of expansion modules make the 6869i a powerful and ...

Mitel 6867i

The 6867i SIP provides remarkable HD wide band audio and an enhanced speakerphone that utilizes advanced audio processing to achieve richer and clearer conversations. The 6867i offers a large color LCD display, dual port GigE, 6 programmable soft keys, 4 context-sensitive system keys, native...

Mitel 6865i

The 6865 SIP Phone offers exceptional value in a fully featured, expandable IP phone. With its eight programmable keys, XML capabilities, Expansion Module and native DHSG/EHS support, the 6865 SIP phone is ideally suited for the small to large business markets that need Gigabit throughput for PC...

Mitel 6863i

The 6863 2-Line SIP phone system comes with its 2.75” graphical monochrome LCD display, programmable hard keys and smaller desktop footprint.  It is an ideal option for professional workers in business environments that have light telephone use requirements.

Panasonic IP Cordless Phone

Easy to install and manage, Panasonic's new 600 IP cordless phone system is the ideal solution for businesses looking to reap the benefits of cloud communications. Continue your conversation and your work without interruption with the fully featured cordless phones by Panasonic. Both handset...

MiVoice Conference Phone

MiVoice technology is used to transition microphones from one active talker to the next, while virtually eliminating ambient room noise and side conversations that could impact intelligibility of the conversation on the far end.

Trio Conference Phone

The Trio is the first smart hub for group collaboration that transforms the iconic three-point conference phone into a voice, video and content sharing system that can fit into any team environment, large or small.

Polycom Conference Phone

For all calls, the the IP conference phone delivers advanced audio performance that is designed for executive offices and smaller conference rooms with up to 6 participants. The IP 5000 provides a clear audio sound by utilizing full-duplex technology, which eliminates distracting drop-outs, as...

Additional Devices


Up to 3 M685i modules can be used with the 6800 Series; models 6865, 6867 and 6869 listed above. With each module offering a total of 84 keys (3 pages of 28 keys each), a combined total of 252 keys are available when 3 M685 modules are deployed, enabling 6800 Series phones to become robust...

Pro Headset

Jabra PRO 920 is a professional entry-level wireless headset designed for use with desk phones. The robust Jabra PRO 920 offers all the essential features of a wireless headset in a simple design at an attractive price point. Greater productivity and comfort Jabra PRO 920 frees...

Firewall Internet Security

SonicWall TZ series firewalls provide broad protection with advanced security services consisting of on-box and cloud-based anti-malware, anti-spyware, application control, intrusion prevention system (IPS), and URL filtering. To counter the trend of encrypted attacks, the SonicWall TZ series...

Router and Switches

The Cisco 300 switches deliver the features you need to improve the availability of your critical business applications, protect your sensitive information, and optimize your network bandwidth to deliver information and applications more effectively.

Overhead Paging Devices

Overhead paging can be provided to your existing overhead speaker infrustructure. We can also add a new system to provide complete overhead paging coverage for your environment.

Analog Door Phone

Door phones give you the ability to allow visitors to call into the building for access when needed.   If the doors are secured by a magnetic lock, you can simply press a key on your phone unlock the door to allow your visitor into the building.

IP Door Phone
The IP Algo  Phone offers a new compact form factor for hands-free two-way voice communication with visitors and guests integrated into a premise or a hosted Unified Communications environment.
Phone Speaker

The 8180 SIP Audio Alerter is a SIP compliant PoE network audio device for loud ring and voice paging applications using dual endpoints. When registered with a SIP server, one endpoint will play an audio file from internal memory upon ring detection. The second endpoint will auto-answer for...

IP Video Door System

The GDS3710 is an IP Video Door System that also serves as a high-definition IP surveillance camera and IP intercom to offer facility access control and security monitoring for buildings of all sizes. This System offers a 180-degree video viewing angle for wall-to-wall coverage, has a built-in...

Phone Light

The 8128 SIP Strobe Light is a SIP compliant PoE high intensity strobe light for alerting and notification of telephone, emergency, safety, and security events.