Field service first
MD3 is built for companies that still depend on working systems in real buildings. We focus on what has to function on-site, not on abstract platform language.
MD3 Communication Service, Inc.
On-site phone and security support for NYC and New Jersey.
We install, repair, upgrade, and support legacy business phone systems, building intercoms, door access control, and CCTV for offices, restaurants, hotels, and multi-tenant properties.
Since 2005
Operating as MD3
30+ years
Industry expertise
NYC + NJ
Primary coverage
AVAYA / Panasonic / NEC
Legacy brands supported
Why MD3
Useful support for systems that still have to work tomorrow morning.
This site is intentionally tighter than the old builder version. MD3's offer is strongest when it stays focused on field support, legacy system practicality, and communication plus security in the same operational footprint.
Comfort with legacy environments
We support digital PBX, IP PBX, mixed vendor environments, upgrades, moves, adds, changes, and replacement planning without forcing a rip-and-replace approach.
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.
Core Services
One service line per operational problem.
Each page now has one clear job instead of mixing unrelated template copy, placeholder SEO, and duplicated sections.
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 cleaner entry flow and safer 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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Where MD3 Fits
Built for active sites, not generic web-builder promises.
MD3 supports environments where downtime, weak visibility, or poor entry control create immediate operational friction.
Corporate offices
Restaurants
Hotels
Call centers
Residential and mixed-use buildings
Banks and regulated facilities
How MD3 Works
A service process built for live environments.
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 on-site support or a straight answer on your system?
Tell us 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.