Intercom or Buzzer Not Working
No ring, no audio, weak audio, one apartment offline, lobby-panel problems or a door that will not release.
Licensed NYC Low-Voltage Security Contractor
NYC Security Systems: Intercom Repair, Cameras, Access Control & Alarms
Unlimited Applications Security Company repairs, installs and upgrades intercoms, security cameras, access-control systems and alarms for apartment buildings, co-ops, condominiums, brownstones, homes, storefronts, offices and mixed-use properties across New York City.
If an apartment buzzer will not ring, a door release will not unlock, cameras have stopped recording, a DVR or NVR will not play back footage, or a card or key-fob reader has stopped working, start with the affected system below. We troubleshoot the existing equipment before recommending repair, replacement or an upgrade.
- Intercom and door entry
- Security cameras
- Access control
- Alarm systems and monitoring
Request a Free Estimate
Tell us the property and the system involved. Larger projects receive a free itemized estimate after an on-site review.
30+ YearsNYC security experience
LicensedInsured • Bonded
CertifiedAlarm, CCTV, access control, intercom
Five BoroughsPlus Nassau, Suffolk, Westchester
Owner-LedSmall crew, direct contact
Free EstimatesLarger itemized work
Start With the Problem
What Is Your Security System Doing?
Choose the symptom that best matches what is happening now. These links lead to the service or troubleshooting information most relevant to that problem.
Cameras Live but Not Recording
Camera outages, DVR or NVR errors, hard-drive warnings, failed playback or remote-viewing problems.
Card, Fob or Door Reader Not Working
Failed readers, controllers, relays, electric strikes, magnetic locks, credentials or door-release equipment.
Alarm System or Monitoring Problem
Alarm-panel faults, sensors, communication problems, existing-system service or monitoring questions.
What We Do
Four Service Lines for NYC Properties
Most buildings call about one system and end up needing two, because entry, video, credentials and detection share the same low-voltage wiring and door hardware. Each line below has its own service page.
Intercom and Door Entry
Our highest-volume work. Apartment buzzers, lobby panels, telephone entry, video and IP intercoms, and the door-release equipment they depend on.
- Buzzer, station and lobby panel repair
- Telephone entry programming and call routing
- Video and IP intercom installation
- Electric strikes, magnetic locks and relays
Security Cameras
Camera systems for entrances, lobbies, hallways, package areas, yards and commercial floors, sized to what the property actually needs to see.
- New camera system design and installation
- Repair of existing cameras, cabling and recorders
- Recorder, storage and remote viewing setup
- Entrance and package-area coverage
Verified repair example: a Park Slope apartment building had live video but no recording; testing identified a storage-related failure, the Hikvision DVR hard drive was replaced with a 2 TB drive, and recording, playback and remote viewing were restored. View the 16-camera Park Slope DVR repair →
Access Control
Controlled entry for buildings that need to manage credentials rather than hand out keys, from a single door to a multi-entrance property.
- Keypads, card and fob readers
- Credential management and user changes
- Magnetic locks, electric strikes and exit devices
- Integration with intercom and door release
Alarm Systems and Monitoring
Intrusion detection and monitored protection for residential, commercial and mixed-use properties, including work on existing panels.
- Alarm system installation and service
- Door, window and motion detection
- Panel, keypad and sensor troubleshooting
- Monitoring options
Who We Work With
Properties We Service Across New York City
A four-unit brownstone and a 90-unit co-op have different wiring, different door hardware and different approval processes. The work is scoped to the property, not to a package.
Apartment Buildings
Multi-tenant entry, riser wiring, lobby panels and shared door-release equipment.
Co-ops and Condominiums
Board and managing-agent approvals, documented scope, coordination with building staff.
Brownstones and Townhouses
Two- to six-family entry systems, often with older wiring and discontinued equipment.
Private Homes
Doorbells, cameras, alarms and gate communication for single-family properties.
Storefronts and Offices
Controlled entry, camera coverage and after-hours protection for small commercial space.
Mixed-Use Buildings
Separate residential and commercial entrances sharing one low-voltage infrastructure.
Managed Portfolios
Repeat service across multiple addresses under one management company.
Institutional and Industrial
Facilities needing coordinated entry, detection and video across several doors.
How a Job Runs
From First Call to Tested Equipment
The same four steps apply whether the job is one stuck door release or a full camera and access-control installation.
Describe the Problem
Call with the address, property type, system brand if known and what the equipment is doing now. Many issues are narrowed down on the phone.
On-Site Review
We check the equipment, accessible wiring, power and connected door hardware before quoting anything beyond a common repair.
Scope and Price Approved
Findings and price are explained first. Larger projects get a free itemized estimate you can circulate to a board or owner. No work starts before approval.
Install, Test, Warrant
Work is completed and function-tested end to end. Qualifying repairs carry a 30-day repair warranty.
One Low-Voltage Path
Why These Four Systems Belong to One Contractor
In most NYC buildings the intercom, the camera at the entrance, the reader on the door and the alarm contact on the frame share wiring, power supplies and the same release hardware. A buzzer that rings but never unlocks may be a relay, a transformer, an electric strike or an access-control connection, and the fastest way to find out is to have one contractor who works on all four.
That also matters when a building upgrades. Adding a video intercom, putting a camera on the package area or replacing keys with fobs are separate projects that land on the same door. We review the whole entry path before recommending which part to change.
From Our Channel
Building Security Systems in Practice
Intercoms, access control, electric door hardware and cameras often share one entry path. The right solution depends on the installed equipment and the building's requirements. Watch the Short on YouTube →
Equipment and Systems
What We Work On
Service depends on the exact model, parts availability, wiring condition and equipment age. Brand names below help identify common systems; listing a brand does not imply manufacturer certification or affiliation.
Intercom and Door Entry
Lee Dan, Aiphone, TekTone, Comelit, Akuvox, 2 Easy, DoorKing, Mircom, Urmet and 2N audio, video, telephone entry and IP systems.
Cameras and Recording
Hikvision, Dahua, Axis, Hanwha, Bosch, Uniview and Lorex cameras, recorders, cabling and remote viewing.
Access, Locks and Detection
Keypads, card and fob readers, magnetic locks, electric strikes, exit devices, relays, power supplies, alarm panels, keypads and sensors.
Where We Work
Service Across the Five Boroughs and Beyond
Queens is our home borough and our highest job volume, followed by Brooklyn, Manhattan, the Bronx and Staten Island. Service is also available in Nassau, Suffolk and Westchester counties, subject to scheduling and project scope.
Queens
Astoria, Long Island City, Forest Hills, Flushing, Jamaica and surrounding neighborhoods.
Queens service →Brooklyn
Park Slope, Williamsburg, Bushwick, Bay Ridge, Canarsie, Flatbush and nearby areas.
Brooklyn service →Manhattan
Midtown, Harlem, Upper East Side, Upper West Side, Downtown and nearby locations.
Manhattan service →Bronx
Riverdale, Fordham, Kingsbridge, Pelham Bay, Morris Park and surrounding communities.
Bronx service →Staten Island
St. George, New Dorp, Great Kills, Tottenville and nearby neighborhoods.
Staten Island service →Customer Feedback
What Building Owners and Residents Say
“Amazing company, Wayne is the man. The product and level of service are top notch, the job was done right the first time, quickly, and he made sure everything was working 100%.”GM — Google Review
“My intercom was on the fritz. Wayne was knowledgeable, fair priced and very easy to work with.”TCM — Google Review
“Repair of a Lee Dan buzzer/intercom entry system for a 3-family building was done professionally and cost effectively.”Amy Strickland — Google Review
Direct Answers
Questions About Working With Us
Is Unlimited Applications Security Company licensed, insured and bonded?
Yes. Unlimited Applications Security Company is licensed, insured and bonded, and certified in alarm, CCTV, access control and intercom installation and repair, with more than 30 years of work in New York City buildings.
Which areas do you cover outside New York City?
Beyond the five boroughs, service is available in Nassau, Suffolk and Westchester counties, subject to scheduling, travel and project scope. Confirm coverage for your address when you call.
Do you work with property managers, boards and managing agents?
Yes. We work with owners, boards, managing agents and building staff, and provide a written scope and itemized estimate that can be circulated for approval before work begins.
Can you service a system another company installed?
In most cases, yes. What matters is the equipment type, the condition of the existing wiring, whether parts are still available and whether the installed system is still supported by its manufacturer.
Do you handle both residential and commercial properties?
Yes. We service apartment buildings, co-ops, condominiums, brownstones and private homes, as well as storefronts, offices, mixed-use buildings and managed commercial properties.
Can more than one system be handled on the same visit?
Often, yes, when the systems are related. An intercom and its door release, or a camera and an access-control reader at the same entrance, are commonly reviewed together. Combining work depends on scope, parts and site access.