Multiple authentication paths at a single door position

The defining value of the R25K format is operational flexibility. A visitor can place a call through the SIP intercom function, a known user can enter via keypad using a PIN workflow, and authorised occupants or staff can present an RF card at the built-in reader. This is particularly useful at locations where pedestrian traffic changes throughout the day and where different credential types are needed for residents, cleaners, contractors or delivery access windows.

By combining those methods in one housing, the installer can typically simplify the frontage layout and reduce the need for separate mounting positions. It also keeps user interaction consistent at the door: one station for calling, credential presentation and release requests, with SIP serving as the communications layer for integration into broader IP telephony or intercom ecosystems.

SIP architecture suits managed entry systems and IP-based call routing

Because the device is specified as a SIP intercom, it is intended for deployments where door communication is carried over an IP network rather than isolated analogue wiring. That makes it suitable for projects integrating indoor monitors, PBX endpoints, SIP-capable reception desks or centralised intercom platforms, depending on the wider Akuvox and site architecture selected by the integrator.

In practical terms, SIP gives installers a standards-oriented pathway for door station communication while still keeping access functions local to the unit. For small commercial sites and multi-tenant entries, this separation is useful: the network handles call logic and answer points, while the keypad and RF reader provide direct on-site credential interaction at the entrance itself.

Compact façade presence with practical entry control behaviour

The black enclosure gives the station a discreet visual profile against darker gates, aluminium joinery, rendered walls and commercial tenancy entries. For specifiers, that matters where the client wants the entry hardware to remain professional and low-glare while still presenting obvious keypad and credential functions to authorised users.

As a door entry and access-control-support device, the R25K is best positioned where there is a need to screen visitors, support staff or resident self-entry, and centralise the handoff to an electric lock or related access mechanism within the wider site design. Final relay logic, lock hardware, power method and platform compatibility should always be confirmed against the project scope and current Akuvox documentation.

How it works on site

A typical deployment sequence for a SIP door station with keypad and RF card capability.

Session Initiation Protocol, used to establish voice or intercom sessions across IP networks.

A credential reader that identifies an authorised card or tag presented at close range.

Door unlocking or function execution triggered by entering a programmed numeric code on the keypad.

The outdoor or entry-side intercom endpoint mounted at the access point.

The means by which a user proves access rights, such as a PIN, card, token or managed identity.

The action that signals an electric strike, lock or controller to permit entry.

The wider system governing who can enter, when they can enter and how that event is authenticated.

The process of assigning network, SIP and credential settings so the unit operates correctly on site.

An internal endpoint that receives calls from the door station and may trigger remote unlock functions.

Connecting the intercom into a business telephony environment so calls can ring handsets or designated users.

Pairings

Typical categories paired with a SIP access intercom in a complete installation.

FAQ

Does this intercom include both a keypad and card reader?

Yes. The supplied listing identifies an integrated keypad and integrated RF card reader in the same unit.

Is it suitable for door entry as well as access control support?

Yes. The product is described for door entry use and access control support, making it suitable where visitor communication and credential-based access are both required.

What does SIP mean here?

It indicates the intercom operates within an IP/SIP communications environment, allowing door calls to be handled through compatible networked intercom or telephony endpoints.

Can it be used where some users need cards and others need PINs?

That is one of the key strengths of this format. The integrated RF card reader and keypad allow different user groups to authenticate in different ways, subject to the final system configuration.

Is black the supplied finish?

Yes. This specific reference is the black housing version: AK-R25K-BLACK.

Are wiring, relay and physical dimensions confirmed here?

No. Those details were not provided in the source content. Confirm the latest Akuvox technical documentation before procurement for projects requiring exact mounting, lock interface or network specifications.