By the SightShield team · · 3 min read
Two generations of apartment intercom
Many Bangalore apartments built in the 2000s and 2010s have analog intercoms: a handset in each flat wired back to an exchange in the security cabin, so the guard can call a flat and residents can call the gate. Newer buildings use IP video intercoms running over a network, with video indoor monitors, lobby door stations and phone apps. When the old system starts failing, associations must decide whether to repair or upgrade.
Side by side
| Factor | Analog intercom | IP video intercom |
|---|---|---|
| Cabling | Two-wire telephone cable per flat | Network cable (Cat6) or existing two-wire with adapters |
| Video | Usually none | Video from gate and lobby |
| Calls to phone | No | Yes, through an app |
| Flat to flat and clubhouse | Often yes | Yes |
| Door release | Limited | Lobby door and gate release from monitor or app |
| Works without internet | Yes | Local calls yes; app calls need internet |
| Expansion | Limited by exchange ports | Add devices on the network |
Why associations upgrade
- Old exchanges fail and spare parts become hard to find.
- Residents want to see visitors and answer on their phones.
- Visitor management apps need integration with the gate.
- New towers or blocks need to join the same system.
- Lobby doors with video stations improve tower security.
Cabling: the biggest cost question
Running new network cable to every flat in an occupied building is the most disruptive part of an upgrade. Options include using existing conduits to pull Cat6, using two-wire IP systems that run over existing intercom cable, or deploying video only at lobbies and gates with app calls to residents. A survey of existing conduits and riser shafts decides what is practical.
Reliability considerations
- Keep local calling working without internet; app calls are a bonus, not the only path.
- Put the intercom server, switches and door stations on a UPS.
- Separate the intercom network from residents’ internet and CCTV.
- Choose systems with local support and spare parts in Bangalore.
Integration
IP intercoms can release gates and lobby doors, link to boom barriers, and in some cases integrate with visitor management apps so guards log a visitor and the resident answers with video. Ask vendors which integrations are proven in other Bangalore communities rather than promised.
Apartment visitor management and intercom →Cost factors
- Number of flats, towers and lobby or gate door stations.
- Whether new cable is needed or existing cable can be reused.
- Indoor monitors in every flat, or app-only for most residents.
- Server, switches, UPS and integration with gates and barriers.
- Licences or app subscriptions, if the platform charges per flat.
Questions for vendors
- Which Bangalore communities run this system, and can we speak to their committees?
- What happens to calls if the internet is down?
- Is there a monthly or yearly fee per flat?
- How are residents added and removed when flats change hands?
An example
A 240-flat community in JP Nagar with a failing analog exchange chose a phased upgrade: IP video door stations at each tower lobby and the main gate first, with calls to residents’ apps and to an indoor monitor for flats that wanted one; existing two-wire cable was reused through adapters where possible. Old handsets stayed working during the transition. Within a year, most residents used the app, and the old exchange was retired.
Plan the upgrade
We survey existing intercom cabling and design upgrade paths that limit disruption to residents.
Intercom systems →Quick answers
Can an analog intercom be upgraded to video?+
Yes, often in phases, sometimes reusing existing two-wire cable with IP adapters.
Does an IP intercom work without internet?+
Local calls within the building work; app calls to phones need internet.
Do residents need an indoor monitor?+
Not necessarily; many answer on a phone app, with monitors optional.
Can the intercom open the lobby door?+
Yes, IP intercoms can release lobby doors and gates from the monitor or app.
How disruptive is an intercom upgrade?+
It depends on cabling. Reusing conduits or two-wire cable keeps disruption low.