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GSI provides comprehensive communication solutions by combining equipment with essential telephone services like hosted PBX or SIP trunks. Our systems support more than just external calls; they enable seamless room-to-room communication and secure entry management for residential, small office, and large multi-tenant buildings. Whether you need a simple intercom or a system featuring live video for guest identification, GSI has you covered.

Comelit’s ViP is the new IP video door entry system which combines powerful performances with ease of installation
An unlimited number of devices can be connected to the network created by the ViP system, eliminating any limit to the number of users.
ViP overcomes the traditional limitations of video door entry systems: the IP network allows simultaneous audio-video conversations without any additional cabling or modifications. The ViP system is never busy.
The ViP system allows wiring of buildings and apartments without any distance limitations. The ViP system can be expanded as needed, following the expansion of a building or complex.
Global Systems Integrators is a Comelit Reseller.

Free and compatible with all modern devices, the Comelit app allows you to: – Receive calls from the entrance panel wherever you are – Review video messages recorded by visitors for missed calls – Call the internal devices in your system (video/audio entry phones) – Open gates and doors. The app works with PUSH notifications; this means that it is only activated upon receipt of a call which saves power and data. Install a Comelit system and enjoy all the advantages of an entry phone in your pocket.

Ultra series flush-mounted audio/video entrance panel with 5” touch-screen module, for IP (ViP) system. Twilight sensor for touchscreen backlighting management. Omnidirectional digital microphone and dual loudspeaker for high-fidelity audio. Wide-angle color video camera with 160° horizontal and 100° vertical field of vision. Audio-visual indications for disabled individuals’ assistance request. 5” capacitive display with high visibility and impact-proof glass, plus white or black theme selection. Easy-to-use graphic interface can be customized with virtual call buttons or with a number keypad to call users when the relevant code is known. Access control function with activation of the audio or audio/video module outputs and the system actuators. Buttons can be customized for direct calls to the switchboard, commercial activities with corresponding logos and to display welcome messages.
Global Systems Integrators is a Comelit Diamond Dealer.
Telephone entry systems allow for voice communication from the lobby or gated entrance using a standard telephone line. These systems can be as simple as a keypad with a printed directory or have a built-in digital directory with a large LCD display. Access control can also be added to these systems to allow keyless entry for the residents.

Grandstream’s series of IP Video Phones extend the power of advanced video and audio communications to the desktop while offering tablet-like functionality and web access. Users will enjoy a powerful multimedia experience with these cutting-edge video phones.

The GDS3720 series is an HD Video Door System that tracks, manages and records access to any physical building while also serving as an IP surveillance camera and IP intercom. It offers powerful integration with other Grandstream solutions in order to offer a complete solution for access-control, video intercom and security monitoring.
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A powerful yet easy to manage voice, video, data, and mobility communications platform has never been more achievable than when anchored with Grandstream’s series of UCM IP PBXs. The UCM series of IP PBXs offer an extensive set of unified communication features in an easy-to-manage on premise solution with no licensing fees, upgrade fees or costs per features. Grandstream’s UCMs range from small and medium business deployments to small and medium enterprise solutions.


Unified Communications as a Service (UCaaS) utilizes cloud technology and Yealink desk phones to improve out-of-date phone systems. UCaaS (also known as Hosted VoIP or Hosted PBX) allows customers to easily reach employees using only one phone number. Whether they’re working remotely, in the field, or in another business location, customers reach who they need with ease. Experience high-definition voice quality, data services, collaboration tools, mobility, contact center functions, along with advanced calling features across all of your business locations and devices.
UCaaS is an internet phone system that is managed and monitored through cloud hosting. The convenient system, through Yealink phones, allows for easily managing calls across a single office or multiple locations, even when reaching remote employees or employees on mobile.

Building a powerful, secure, and easy-to-manage unified communications and collaboration platform has never been more achievable than with Grandstream. We provide a wide-range of PBX platforms that allow all you to build the ideal solution for all needs. The UCM Series provides highly customizable on-premise IP PBXs, UCM RemoteConnect provides a hybrid solution that combines the best of on-premise and cloud solutions, CloudUCM offers a secure, scalable cloud PBX platform, and SoftwareUCM offers a secure and scalable software-based PBX solution.

Grandstream’s GXV series of IP Video Phones for AndroidTM extend the power of advanced video and audio communications to the desktop while offering tablet-like functionality and web access. Users will enjoy a powerful multimedia experience with these cutting-edge video phones.

Our High-End IP phones are designed for users who are often on the phone and need access to advanced features, line support and usability options. Get more done, handle more calls, and keep in touch with more people using Grandstream’s GXP2100 series.

The GSC Series offer top-notch intercom and paging functionality ideal for office buildings, enterprises, schools, healthcare facilities, retail centers, residential settings, warehouses and other indoor environments. This series allows businesses to build powerful SIP intercom and paging solutions that expand communication and add security.
Comelit’s ViP is the new IP video door entry system which combines powerful performances with ease of installation
An unlimited number of devices can be connected to the network created by the ViP system, eliminating any limit to the number of users.
ViP overcomes the traditional limitations of video door entry systems: the IP network allows simultaneous audio-video conversations without any additional cabling or modifications. The ViP system is never busy.
The ViP system allows wiring of buildings and apartments without any distance limitations. The ViP system can be expanded as needed, following the expansion of a building or complex.
Global Systems Integrators is a Comelit Reseller.

Free and compatible with all modern devices, the Comelit app allows you to: – Receive calls from the entrance panel wherever you are – Review video messages recorded by visitors for missed calls – Call the internal devices in your system (video/audio entry phones) – Open gates and doors. The app works with PUSH notifications; this means that it is only activated upon receipt of a call which saves power and data. Install a Comelit system and enjoy all the advantages of an entry phone in your pocket.

Ultra series flush-mounted audio/video entrance panel with 5” touch-screen module, for IP (ViP) system. Twilight sensor for touchscreen backlighting management. Omnidirectional digital microphone and dual loudspeaker for high-fidelity audio. Wide-angle color video camera with 160° horizontal and 100° vertical field of vision. Audio-visual indications for disabled individuals’ assistance request. 5” capacitive display with high visibility and impact-proof glass, plus white or black theme selection. Easy-to-use graphic interface can be customized with virtual call buttons or with a number keypad to call users when the relevant code is known. Access control function with activation of the audio or audio/video module outputs and the system actuators. Buttons can be customized for direct calls to the switchboard, commercial activities with corresponding logos and to display welcome messages.
Global Systems Integrators is a Comelit Diamond Dealer.
Telephone entry systems allow for voice communication from the lobby or gated entrance using a standard telephone line. These systems can be as simple as a keypad with a printed directory or have a built-in digital directory with a large LCD display. Access control can also be added to these systems to allow keyless entry for the residents.

Grandstream’s series of IP Video Phones extend the power of advanced video and audio communications to the desktop while offering tablet-like functionality and web access. Users will enjoy a powerful multimedia experience with these cutting-edge video phones.

The GDS3720 series is an HD Video Door System that tracks, manages and records access to any physical building while also serving as an IP surveillance camera and IP intercom. It offers powerful integration with other Grandstream solutions in order to offer a complete solution for access-control, video intercom and security monitoring.
![]()
A powerful yet easy to manage voice, video, data, and mobility communications platform has never been more achievable than when anchored with Grandstream’s series of UCM IP PBXs. The UCM series of IP PBXs offer an extensive set of unified communication features in an easy-to-manage on premise solution with no licensing fees, upgrade fees or costs per features. Grandstream’s UCMs range from small and medium business deployments to small and medium enterprise solutions.


Unified Communications as a Service (UCaaS) utilizes cloud technology and Yealink desk phones to improve out-of-date phone systems. UCaaS (also known as Hosted VoIP or Hosted PBX) allows customers to easily reach employees using only one phone number. Whether they’re working remotely, in the field, or in another business location, customers reach who they need with ease. Experience high-definition voice quality, data services, collaboration tools, mobility, contact center functions, along with advanced calling features across all of your business locations and devices.
UCaaS is an internet phone system that is managed and monitored through cloud hosting. The convenient system, through Yealink phones, allows for easily managing calls across a single office or multiple locations, even when reaching remote employees or employees on mobile.

Building a powerful, secure, and easy-to-manage unified communications and collaboration platform has never been more achievable than with Grandstream. We provide a wide-range of PBX platforms that allow all you to build the ideal solution for all needs. The UCM Series provides highly customizable on-premise IP PBXs, UCM RemoteConnect provides a hybrid solution that combines the best of on-premise and cloud solutions, CloudUCM offers a secure, scalable cloud PBX platform, and SoftwareUCM offers a secure and scalable software-based PBX solution.

Grandstream’s GXV series of IP Video Phones for AndroidTM extend the power of advanced video and audio communications to the desktop while offering tablet-like functionality and web access. Users will enjoy a powerful multimedia experience with these cutting-edge video phones.

Our High-End IP phones are designed for users who are often on the phone and need access to advanced features, line support and usability options. Get more done, handle more calls, and keep in touch with more people using Grandstream’s GXP2100 series.

The GSC Series offer top-notch intercom and paging functionality ideal for office buildings, enterprises, schools, healthcare facilities, retail centers, residential settings, warehouses and other indoor environments. This series allows businesses to build powerful SIP intercom and paging solutions that expand communication and add security.