The PBX built for Hotels, Brainbox.

BrainBox by GrayMatter Networks is a flexible, software-based phone system that adapts to your Hotel’s needs. We deliver simple and fair solutions to your overly complex telecom challenges: On premises, in the cloud, or both – it just works.

Your voice securely delivered, with hSIP.

hSIP is GrayMatter’s fully licensed SIP trunking service, delivering crystal-clear voice, messaging, and next-gen 911 through geo-redundant infrastructure. With unlimited calling, emergency call handling, hosted voicemail, and built-in cost savings, it’s a robust and secure telecom solution for hotels.

Unlimited possibilities with our AI Stack.

GrayMatter’s AI Stack handles up to 70% of guest requests — like bookings, amenities, or late checkouts — without human intervention, while still offering seamless handoff to staff when needed. With voice, chat, and SMS integration, it cuts labor costs, boosts efficiency, and connects directly with hotel systems for a smooth guest experience.

Explore the space in between, with Synapse.

Synapse replaces legacy copper lines with a secure, code-compliant, and always-on solution for mission-critical systems like fire alarms, elevators, and security. With remote monitoring, 5G backup, and 24/7 support, it ensures reliability while significantly lowering telco costs.

Monitor your system the right way, with Optiq.

Optiq is a powerful customer and partner portal that gives full visibility into support tickets, billing, property info, and call logs. It streamlines operations for hotels and partners by centralizing service history, account tools, and essential platform data in one place.

We're working with the top Hotel Brands across the globe

Transform Your Hotel’s Phone System Without the Hidden Costs

While others also do Hotels, we only do Hotels. At GrayMatter Networks, we’re laser focused on the hospitality industry. It’s where we all got started

WHY

We believe your Hotel’s PBX should make the experience of your guests, and staff better, not more complicated. Once we get your phone system set up and working, it should never come up in the daily operations meeting. Hotels deserve to spend time where it matters, focusing on their guests, not their technology

HOW

We integrate the phone system with your PMS, provide features for call accounting, wake up calls, housekeeping codes for room status changes and fast, efficient, clear communication both internally and externally

WHAT

We manufacture the BrainBox PBX leveraging open-source, standards based technology. This means you’re not “vendor locked” with hardware, management or support choices. It’s a simple, yet powerful solution that we believe the Hotel should own with the full training and understanding to not only use, but manage yourself if you wish

Transform Your Hotel’s Phone System Without the Hidden Costs

While others also do Hotels, we only do Hotels. At GrayMatter Networks, we’re laser focused on the hospitality industry. It’s where we all got started

WHY

We believe your Hotel’s PBX should make the experience of your guests, and staff better, not more complicated. Once we get your phone system set up and working, it should never come up in the daily operations meeting. Hotels deserve to spend time where it matters, focusing on their guests, not their technology

HOW

We integrate the phone system with your PMS, provide features for call accounting, wake up calls, housekeeping codes for room status changes and fast, efficient, clear communication both internally and externally

WHAT

We manufacture the BrainBox PBX leveraging open-source, standards based technology. This means you’re not “vendor locked” with hardware, management or support choices. It’s a simple, yet powerful solution that we believe the Hotel should own with the full training and understanding to not only use, but manage yourself if you wish

For Hotels

BrainBox

Software-Based PBX for Hotels
Full PMS integration
Unlimited extensions, queues & voicemail boxes
Built-in call accounting & reporting
ng911 compliant (Ray Baum’s Act & Kari’s Law)
Secure with multi-factor authentication & VPNs for zero internet footprint

AI Guest Communication Stack

Leverage voice, web chat, SMS or WhatsApp communication with your guests using industry leading AI tools to reduce phone calls to your front desk and operators - Linked with your ticketing systems and task management tools, it’s a game changer

24/7 Support, Project & Account Management

We have a global support team with decades of experience supporting hotels around the clock. Oh, we live answer support telephone calls too - The way a phone company should

Call Center Tools & Reporting

Detailed reporting on your calls. Inbound, Outbound, talk time, wait time, abandonment rate, wrap up time, call volume by month, week, day or hour + real-time admin monitoring tools for listen, whisper, barge and alerts based on service level

Multi-Property Support

Connect multiple Hotels to a centralized PBX and integrate your teams, services and products as one

Global Voice Networks

FCC compliant SIP trunking services with unlimited calling on a geo-redundant infrastructure, delivered securely to your property

900 Remote Call Center Operators

Need an overflow service for live answered calls routed off-site to a team of experts? We have over 900 remote call center agents, broken into small teams supporting individual Hotels since 2013