Power Tech Engineering
Security & Communication Systems in Bangladesh
Security and communication systems let you see, control and talk to everyone on a site. That means CCTV to record what happens, access control to decide who enters where, PAVA to give clear evacuation messages in an emergency, and a PABX so offices, floors and the gate can call each other. Most factories and large commercial buildings use all four.
We plan these systems together because they share cable routes, network switches, power backup and, in an emergency, the same few minutes. A free site survey maps cameras, doors, speakers and extensions on your drawings. Our own team then supplies, installs and programs the equipment, links PAVA and access-controlled exit doors to the fire alarm, tests every point and hands over as-built drawings, passwords and a maintenance plan. Support continues around the clock after handover.
At a glance
- Standards
- IEC 62676, IEC 60839-11-1, ISO 7240-16 / EN 54-16, NFPA 72, NFPA 101, BNBC 2020
- Services
- HD & IP CCTV · Access control · PAVA voice evacuation · PABX
- Where
- Chattogram, Dhaka, Gazipur, Narayanganj
Services
Services under Security & Comms.
Security & Comms
HD & IP CCTV
A CCTV system records video from cameras placed at gates, stores, production floors and perimeters so incidents can be reviewed and proven. HD analog cameras reuse coaxial cable and suit smaller or upgrade jobs. IP cameras give higher resolution, smarter analytics and easier expansion. The right choice depends on your site, cabling and how long footage must be kept.
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Access control
An access control system decides who can open which door, at what time, and keeps a record of every entry. Staff use a card, fingerprint, face or PIN instead of a key. A lost card is blocked in the software at once, and the same data can feed attendance and payroll. Escape doors must still unlock automatically in a fire.
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PAVA voice evacuation
PAVA (public address and voice alarm) is a speaker system that does two jobs. Day to day it carries announcements, paging and background music. In a fire it takes signals from the fire alarm and plays recorded evacuation messages, zone by zone, so people know where to go. Spoken instructions are clearer than a siren alone.
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PABX
A PABX is a private telephone exchange that connects the phones inside your building to each other and to outside lines. Staff dial short extension numbers for free internal calls, reception transfers calls, and the gate can reach management in one press. Modern systems are IP or hybrid, so desk phones, mobiles and existing analog sets can work together.
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Which security or communication system do you need?
Most sites start with one problem, and this table shows which system solves it.
| Service | Best for | How it works |
|---|---|---|
| HD & IP CCTV | Best for: Recording incidents, theft and gate traffic for evidence and buyer audits | How: Cameras feed a DVR or NVR; footage is stored and viewable remotely |
| Access control | Best for: Limiting who enters stores, server rooms, offices and production floors | How: Cards, fingerprints or faces unlock doors and log every entry and exit |
| PAVA voice evacuation | Best for: Clear spoken evacuation and paging across large floors and multiple buildings | How: The fire alarm triggers zoned recorded messages through monitored loudspeakers |
| PABX | Best for: Internal calls between offices, floors, gate and management, plus outside lines | How: One exchange connects extensions, intercoms and phone lines, analog or IP |
From free survey to lifetime support in 5 steps.
One team from the first site visit to the maintenance contract, so nothing falls between contractors.
- 01
Free site survey
An engineer visits and maps your risks.
- 02
Design & drawing
NFPA and BNBC 2020-compliant plans, with a written quote.
- 03
Supply & install
Certified brands, installed by our own team.
- 04
Test & commission
Full testing, reports and approval support.
- 05
24/7 maintenance
Scheduled maintenance and emergency call-outs.
Service areas
Security & Comms in Chattogram, Dhaka, Gazipur and Narayanganj.
Our engineers survey, install and maintain on site across these cities and the industrial zones around them. For a site elsewhere in Bangladesh, ask and we will tell you plainly whether we can cover it.
- Chattogram
- Dhaka
- Gazipur
- Narayanganj
Security & Comms: questions buyers ask
No single rule covers every factory, but most international buyers expect both. Social compliance audits and supply chain security programs such as CTPAT look for controlled entry, visitor logs and recorded coverage of gates, loading bays and stores. Check your buyers' codes of conduct; we design to meet the strictest one you work under.
They can share structured cabling and core switches, but we separate them with VLANs or dedicated switches so video traffic cannot slow down door controllers. PAVA used for life safety keeps its own monitored speaker circuits and battery backup, so it still works if the IT network fails.
It depends on the number of cameras, doors, speakers and extensions, the distance between buildings, how long you keep recordings, the brands you choose and whether existing cabling can be reused. We visit the site, agree what each area needs and give a written, itemized quote so you can compare like for like.
They must not. Doors on escape routes are wired to unlock when the fire alarm activates or power fails, and each one has a manual emergency release beside it. NFPA 101 and BNBC 2020 both put free exit ahead of security, and we test this release during commissioning.
Yes. We start with a survey of what is installed, what works and what is missing, then quote for repairs and a maintenance contract. Older analog cameras, standalone door readers and legacy exchanges can often be kept and integrated rather than replaced all at once.
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Know your building is safe. Book in 60 seconds.
Tell us what you need and where. An engineer confirms your survey slot by phone or WhatsApp.
What happens next
- 1
We call or WhatsApp you to confirm a time.
- 2
An engineer visits and assesses your fire, electrical and security risks.
- 3
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