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দরজা না খুলেই দেখুন কে এসেছে — মোবাইল থেকেও কথা বলুন।
A video door phone lets you see and talk to whoever is at your door or gate before you open it, from an indoor screen or, on Wi-Fi models, from your mobile. DigiMark Solution supplies and installs video door phones and video intercom systems across Bangladesh, for single flats, duplex and villa gates, multi-flat apartment buildings and office receptions, from Nexakey, ZKTeco, Hikvision and Grandstream.
Choose by the building, not by the screen size. The building decides the wiring, and the wiring decides the system.
| Your property | What works best | Why |
| Single flat or house, already built | 4-wire video door phone kit with Wi-Fi monitor | One 4-core cable to the door. No network cable to run, and the call still reaches your mobile. |
| Duplex or villa with a gate far from the house | 4-wire kit with an IP65 outdoor station; add fingerprint or card at the gate | You answer and open the gate from inside. Family members let themselves in without a key. |
| Apartment building, many flats | IP / PoE video intercom with an apartment door station | One door station at the lobby rings each flat's monitor over the building network, so the guard no longer climbs stairs |
| Office, bank or factory reception | SIP IP door station (e.g. Grandstream GDS3710) | The gate rings your existing IP phones and PBX, and the visitor is recorded on your CCTV recorder. |
The outdoor station and the indoor monitor are joined by one four-core cable carrying video, audio and power. This is the simplest choice for finished homes, because no network cable has to reach the gate. Modern 4-wire monitors such as the Nexakey NX-VD570-W-MN add Wi-Fi, so calls still go to the phone app.
Each unit is a network device powered over the LAN cable (PoE). IP video intercom scales to many flats and many gates, and links with access control and CCTV. It is the right choice for apartment buildings, offices and new construction where network cabling is planned anyway.
A doorbell with a camera that connects to your home Wi-Fi and rings your phone. It is the easiest to fit, but it depends entirely on your router and internet, and there is no indoor screen unless you add one.
Nexakey NEXA DOOR — 7-inch Wi-Fi touch monitor, 2 MP 148° outdoor station, Nexakey app. The NX-VD770-FMW-CS kit adds fingerprint, card and PIN unlock at the gate. One system grows to 6 monitors, 2 door stations and 3 locks.
The price depends on three things: the wiring type (4-wire, IP or Wi-Fi), the number of indoor monitors or flats, and whether the gate needs fingerprint or card access. A single-flat 4-wire kit is the entry point. Multi-flat IP intercom is priced per building. Send us the number of flats and gates on WhatsApp and we will quote within 2 hours in office time.
Video door phones are a fast add-on to every CCTV and lock job. DigiMark supplies partner pricing, stock, wiring diagrams and technical support for installers across Bangladesh. Become a partner or message us on WhatsApp for the dealer price list.
An IP or PoE video intercom. One door station at the lobby calls each flat's indoor monitor over the building network, and it can scale to every floor. For a single flat inside the building, a 4-wire kit at the flat door is simpler.
Yes, on any model with a Wi-Fi indoor monitor or a Wi-Fi doorbell. The call goes to the brand's app on Android and iOS, and you can talk and unlock the door from there.
Yes. A 4-wire or IP system works between the gate and the indoor monitor with no internet at all. Internet is needed only for answering on your mobile.
Only on backup power. Put the indoor monitor and the router on the same UPS or IPS, and the door keeps answering through an outage.
For a 4-wire system you need one 4-core cable from the door to the monitor, and no network cable. A Wi-Fi doorbell needs no cable inside at all. IP intercom needs a network cable to each unit.
Yes, when it is connected to an electric lock or gate release. You press unlock on the monitor or in the app. Confirm the lock type and voltage with us before ordering.
DigiMark Solution is your trusted IT and security solutions partner in Bangladesh, providing 100% genuine, officially warranted products tailored for corporate offices, factories, and institutions. Explore and buy authentic Video Door Phone & Doorbell with full setup assistance. Our certified engineers offer complete site inspection, setup, and reliable after-sales support.
Visit us in Dhaka (Head Office, IDB, Gulshan, Uttara, Elephant Road) or Chattogram.
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