Intercom Systems

A video intercom is the IP or 2-wire architecture sitting between a visitor at the door and the occupant inside — outdoor door station (camera, microphone, speaker, call button, often a credential reader), one or more indoor monitors, and increasingly a smartphone app that forwards calls when the indoor monitor is unattended. Modern systems integrate with CCTV (door station appears as a camera channel on the NVR, every visitor caller recorded), access control (door release triggered by call or by credential), and alarm systems (arm/disarm at the door station). The architecture splits cleanly: IP systems for new installs using Cat6 and PoE; 2-wire systems for retrofit installs preserving existing intercom risers in apartment buildings. Scale ranges from single residential villa systems through multi-tenant apartment blocks with hundreds of tenant directories.

Security Cameras Australia stocks multi-brand video intercoms including Hikvision, Axis, Hanwha and other commercial brands with installer-grade support for specification and integration.

For the Hikvision-specific range see Hikvision Video Intercoms. For broader business CCTV see security cameras for business.

How a video intercom system works

Four components plus optional smartphone:

Outdoor door station — camera, microphone, speaker, call button. Multi-tenant variants add directory, PIN keypad, RFID reader, or mobile credential reader. Includes door-release output for maglock or strike.
Indoor monitor(s) — touchscreen unit inside the property. Visitor calls ring the monitor; occupant sees, talks, releases the door. Multiple monitors per property where needed.
Management/directory server — for multi-tenant apartment systems. Central tenant directory, call routing, configuration. Single residential systems don't need this.
Mobile app — Hik-Connect, Axis App, or brand-specific equivalent. Forwards calls to smartphones when monitors are unattended.

IP vs 2-wire — the architecture choice

IP (Cat6 over PoE)

The modern standard for new installs. Single Cat6 cable per door station and per indoor monitor, PoE-powered from a central switch. Clean topology, easy expansion, integrates as IP devices on the broader network. Door station appears as a camera channel on most modern IP NVRs.

2-wire (IP over twisted pair)

Designed for retrofit installs preserving existing apartment intercom risers. Modern 2-wire systems multiplex IP data, audio and power over the same 2-wire run that originally carried analog intercom — letting you replace the analog system without re-cabling the building riser. Confirm the existing cable run length and quality against the 2-wire system's specs before commit; there are upper limits.

Hybrid installs

Some larger installs run IP through the new sections and 2-wire through the retrofit sections, bridged at a gateway. Useful for building modernisation that proceeds floor-by-floor.

Install patterns by site type

Single residential villa or house

One door station at the entrance (or one each at front and side gates), one or two indoor monitors, smartphone forwarding when occupants are out. Hik-Connect or equivalent mobile app handles remote answering and door release. Standalone — no central management server needed.

Multi-tenant apartment building

Lobby door station with directory (or PIN/RFID/mobile credential for keyless entry), one indoor monitor per apartment, central management server for tenant directory. NVR integration records all lobby callers; access control integration at the lobby door logs entry events.

Commercial multi-entry

Front-of-house door station with receptionist call routing, side/staff door stations with credential-based entry (RFID, mobile, biometric depending on tier), indoor monitors at reception and security desk. Full integration with broader access control and CCTV.

Gated estate or property

Pole-mount door station at the gate, indoor monitor(s) at the house, gate-release output triggers the gate motor. Smartphone forwarding for guest entry remotely.

Institutional and government

Multi-zone access with credential management, biometric options at controlled zones, full audit logging, integration with broader access control and visitor management systems. Specified against procurement and security framework requirements.

What to specify

Cabling architecture

New install or retrofit — confirms IP vs 2-wire choice. Confirms before selecting door station and monitor model.

Door-release control

Maglock vs electric strike vs gate motor. Confirm voltage and dry/wet contact requirements of the lock or motor against the door station's relay output rating. For higher-current strikes, use an intermediate relay rather than driving the lock from the door station output.

Credential types

Call button only — single residential, all entries handled via occupant approval.
PIN keypad — multi-tenant or commercial, keyless entry with shared or per-user codes.
RFID card/fob — commercial, traditional access credentials.
Mobile credential (Bluetooth/NFC) — modern commercial, phone-as-credential.
Biometric (facial, fingerprint) — higher-security commercial and institutional, with privacy compliance load.

Indoor monitor count

One per dwelling minimum; two or more for larger residential layouts where front door is far from main living areas.

NVR integration

Confirm the existing or planned NVR supports door station integration. Most current commercial-tier NVRs (Hikvision Pro/Ultra, Axis, Hanwha) do.

Management interface

Standalone with mobile app, on-premise management server, or cloud-managed. Multi-tenant typically needs at least the management server tier; commercial may benefit from cloud-managed for multi-site.

Integration with CCTV, alarm and access control

CCTV integration

Door station appears as a camera channel on most current IP NVRs; visitor callers recorded as events. Useful for incident review and visitor history.

Alarm integration

Some systems support arm/disarm at the door station via PIN or credential — useful for residential alarm systems where the door station doubles as the alarm keypad.

Access control integration

The intercom and access control can integrate as the same system (combined platforms) or as separately-managed integrated platforms (intercom triggers door release on access controller's relay). Specify the integration model early.

Privacy and compliance

Visitor recording — door station camera typically records visitors. Signage at entry recommended.
Biometric data — facial or fingerprint deployment requires consent capture, storage governance, and retention policy aligned to Australian Privacy Principles. Significant compliance load.
Multi-tenant directory data — tenant name visibility in the lobby directory is a privacy consideration in some buildings; some systems display unit numbers only with name visible to occupants only.
Retention — visitor caller recordings retained per the broader CCTV retention policy.

Why buy from Security Cameras Australia

Multi-brand authorised dealer — Hikvision, Axis, Hanwha, others. Right brand for the procurement and integration context.
Integration experience · CCTV, alarm, access control integration across major platforms.
Multi-tenant specification · apartment block, gated estate, commercial multi-entry.
Installer referrals · qualified installers for retrofit and new build.
Price-match · free shipping · 30-day returns.

Shop video intercoms

Browse below, or see Hikvision Video Intercoms, the Hikvision parent, or NVRs for recorder integration.

Frequently Asked Questions about Intercom Systems

Can I retrofit a modern video intercom into my existing apartment building?

Often yes — modern 2-wire systems (Hikvision 2-wire IP-over-twisted-pair, equivalent Axis/Hanwha solutions) multiplex IP data, audio and power over the existing 2-wire intercom riser, letting you replace the old analog system without re-cabling the building. Confirm existing cable length and quality against the 2-wire system specs — there are upper limits on run length and tenant count. For older buildings with degraded wiring, partial re-cabling may still be needed.

Will visitor calls forward to my smartphone when I'm not home?

Yes — Hik-Connect (Hikvision), Axis App, and equivalent mobile apps handle call forwarding from the door station to smartphones when the indoor monitor is unattended. You see and talk to the visitor through the door station's camera and speaker, and release the door if appropriate, all from the phone. iOS and Android supported. No cloud subscription required for the basic forwarding function on most platforms.

Can the door station release a maglock or electric strike?

Yes — door stations include relay outputs rated for door-release control. Confirm the voltage and current requirements of your maglock or strike against the door station's output rating. For higher-current strikes (or gate motors at significantly different voltages), use an intermediate relay rather than driving the lock from the door station output directly.

Will the intercom integrate with our existing access control?

Usually yes — most commercial-tier intercoms integrate with major access control platforms (Inner Range Integriti, Gallagher, ICT Protege, Honeywell, others) via shared credentials, event triggers, or platform APIs. The most common integration pattern: access control reads the credential at the door, intercom handles the call/answer flow, both share the door-release event. Specify the integration model at the time of CCTV/access control install.

What's the difference between a consumer doorbell camera and a proper video intercom?

Consumer doorbell cameras (Ring, Eufy, etc.) are single-device residential products — simple to self-install, limited to one door, no maglock control, no multi-monitor support, no commercial features, often cloud-dependent. Proper video intercoms cover single residential through multi-tenant apartment and commercial installs, with door-release control, multi-monitor support, NVR integration, credential-based entry, and on-premise management. For a residential front door with no integration needs, consumer doorbell is easier. For systems integrating with broader CCTV/access/alarm, or anything beyond single residential, proper intercom.