Managed Voice / Paging & Intercom

Door Phone & Intercom Device Integration

A SIP-based door phone or entry intercom (a device using the same call-signaling standard your phone system runs on — see Glossary) connects directly into your system, so any extension — not just a dedicated buzzer panel — can answer the door, speak with a visitor, and unlock it remotely.

What does this actually replace?

A standalone building buzzer/intercom system that only rings a single fixed panel. With integration, the door call can ring a receptionist’s phone, an entire front-office ring group, or even a manager’s mobile app while they’re offsite — the door isn’t limited to one physical answering point.

Can staff see the visitor before answering, or is it audio-only?

Both are supported. Many door phones include a camera, letting whoever answers see a live video preview of who’s there before deciding whether to speak with them or unlock the door — useful for both convenience and basic security screening.

Does answering the door interrupt other calls?

No — a door call comes in like any other extension-based intercom call, using Two-Way Intercom under the hood, and doesn’t require taking the whole phone system offline or dedicating a phone solely to door duty.

What if we already have an older analog buzzer system?

Older analog door hardware can often still be connected using an ATA (Analog Telephone Adapter — a small device that lets non-digital equipment work with a modern phone system). See Connecting Analog Devices.

Can multiple people be responsible for answering the door?

Yes — you can route a door call to a ring group so whoever’s available answers, rather than relying on one specific person always being at their desk.