Field service first
MD3 is built for companies that still depend on working systems in real buildings. We focus on what needs to work on-site without adding unnecessary complexity.
MD3 Communication Service, Inc.
On-site phone and security support for NYC and New Jersey.
MD3 installs, repairs, and supports business phone systems, intercoms, door access control, and CCTV for businesses and buildings across NYC and New Jersey.
Since 2005
Operating as MD3
20+ years
Company experience
NYC + NJ
Primary coverage
AVAYA / Panasonic / NEC
Legacy brands supported
Why MD3
Clear help for the systems that cannot stay down.
MD3 keeps the message simple: phones, intercom, access, and cameras, supported on-site across NYC and New Jersey.
Comfort with legacy environments
We support digital PBX, IP PBX, mixed vendor environments, upgrades, moves, adds, changes, and replacement planning without pushing unnecessary replacement.
Security and communications together
Phone, intercom, access, and CCTV often affect the same daily workflow. We design them to support each other instead of living as disconnected systems.
Services
Choose the system that needs attention.
Each page explains what MD3 handles and when that service is the right fit.
01
Legacy PBX, IP PBX, on-site support
Business Phone Systems
Installation, repair, programming, moves, adds, changes, and practical upgrade planning for AVAYA, Panasonic, NEC, Toshiba, and other business phone environments.
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02
Entry communication, video upgrades
Building Intercom Systems
Tenant entry panels, lobby stations, video intercom upgrades, and building communication systems designed for easier visitor management.
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03
Credentialed entry, logs, local or cloud
Door Access Control
Door access setups for offices, restaurants, and multi-tenant properties with clearer accountability, easier access management, and dependable day-to-day operation.
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04
Installation, upgrade, troubleshooting
CCTV & Surveillance
Camera planning, recorder replacement, coverage expansion, outage troubleshooting, and practical surveillance support for active facilities.
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Software + AI In Progress
MD3 is also building its own softphone and AI call tools.
Alongside field service, MD3 is developing software for the call workflows many businesses now expect. That work is shaped by the same SIP, PBX, and customer-service realities MD3 already supports in the field.
- Windows and Android softphone development now in progress
- AI voice workflows for answering, routing, and collecting caller details
- Built around real live-system conditions, not just abstract demos
How MD3 Works
How a job usually moves forward.
01
Assess the live environment
We review the system, the site, and the operational issue before recommending changes.
02
Scope the practical fix
We align the solution to the building, system age, workflow, and budget instead of pushing a generic package.
03
Install, repair, and support
We complete the work cleanly, confirm performance on-site, and stay available for future support.
Next Step
Need help with a live system issue?
Tell MD3 what system you have, what is failing, and where the site is located. We will confirm whether the job fits our coverage and what the next step should be.