Aiphone GF-1DK ** Service USE Only **

Aiphone GF-1DK Intercom Station

Overview

The Aiphone GF-1DK is a multi-tenant intercom station designed for residential and light commercial deployments where you need simple, cost-effective indoor communication across distributed locations. Built to work within Aiphone's GF series system, the GF-1DK (sometimes searched as GF 1DK) handles up to 2 tenant stations per resident location on a single 2-conductor common-bus wiring topology—eliminating the complexity of parallel wiring runs while keeping installation costs predictable.

This is a service-rated unit intended for integrators and facility managers working with existing Aiphone infrastructure or planning small-scale multi-family or office intercom networks where extended wiring distances and simple topology matter more than advanced analytics or video capability.

Key Features

• 2-Conductor Common-Bus Wiring: Uses Aiphone spec #87200250C (2-conductor PE insulated, non-shielded, 11.05 pf/ft)—a single pair powers and carries audio, reducing cable runs to a fraction of what discrete wiring would require. Means fewer conduit penetrations, lower labor on retrofit jobs, and simpler troubleshooting when you're chasing signal issues.
• Up to 980 Feet Wiring Distance at 20AWG: Aiphone's bus topology lets you stretch a single run up to 980 feet without signal loss or dropout, assuming 20AWG conductor—critical for sprawling apartment complexes, warehouses with distributed tenant areas, or office buildings where running individual twisted pairs to each station would be cost-prohibitive.
• Up to 2 Tenant Stations Per Location: Each resident or office location can support 2 intercom units on the same bus connection, reducing the number of drop points and panel terminations you must install and maintain.
• Single-Channel Talk Path with Privacy: One-way or two-way communication (depending on system configuration) with privacy mode to prevent eavesdropping on active calls—a baseline security feature for residential and sensitive office deployments where tenants must trust the intercom won't bleed conversations into hallways or shared equipment areas.
• Wide Operating Temperature Range (32–104°F / 0–40°C): Rated for standard indoor climates and heated basements; not suitable for outdoor, unconditioned, or cold-storage environments. If your deployment includes unheated mechanical rooms or external gatehouse stations, verify your system controller can operate in that environment—the GF-1DK itself will function, but the master unit may not.
• Compact Physical Form: At 7-7/8" wide × 3-1/2" high × 2-1/2" deep and weighing only 0.81 lbs (370g), the GF-1DK mounts flush into a standard 1-gang electrical box or surface-mount housing—fits retrofit scenarios where wall space is tight and new construction budget doesn't allow for large enclosures.

Integration & Compatibility

The GF-1DK is a tenant station component; it does not function standalone. It connects to an Aiphone GF series master unit or multi-line controller that supplies power via the 2-conductor bus and manages call routing, recording, and access integration. Verify your planned master controller supports the GF-1DK station topology before ordering—not all Aiphone products in the residential line support multi-tenant configurations on a single bus.

If you are integrating with access control panels or intercom systems from other manufacturers, confirm bus compatibility and voltage specs with your integrator; cross-brand wiring on a common bus is not recommended and will likely result in signal corruption or power delivery failure.

For small multi-family or office deployments, pair the GF-1DK with PoE-capable cabling infrastructure if your master controller supports it, reducing the number of separate 24VDC power runs you must install.

Wiring and Installation Notes

Use Aiphone spec #87200250C wire (2-conductor PE insulated, non-shielded) for maximum rated distance. Substituting lower-gauge or shielded cable will reduce signal range and may introduce impedance mismatches that degrade audio clarity. The 11.05 pf/ft specification ensures predictable propagation delay across long runs—don't ignore this when specifying cable; capacitive loading outside this tolerance can cause phase shift and feedback in some system configurations.

Plan your bus topology before trenching. A single fault on the common bus can disconnect all downstream stations—consider a daisy-chain layout with test points at each branch if your deployment exceeds 500 feet. If redundancy is required (critical access points), plan a second independent bus controlled by the same master unit.

What's in the Box

The GF-1DK is typically supplied as a bare station unit. Mounting hardware, wall plate, and audio handset (if required) are usually ordered separately or bundled with a system kit. Confirm with your integrator what is included in your order—station-only deliveries are common for replacement or expansion installations.

Frequently Asked Questions

Q: Can I use the GF-1DK without an Aiphone master unit?

A: No. The GF-1DK is a slave station that requires a compatible Aiphone GF series master controller to supply power and manage calls. It has no standalone intercom capability.

Q: What is the maximum number of stations I can put on a single bus?

A: The GF-1DK supports up to 2 stations per resident location, and the maximum number of locations depends on your master controller model. Check your controller's documentation for total station count limits.

Q: Can I mix GF-1DK stations with other Aiphone station models on the same bus?

A: Some Aiphone configurations support mixed stations on a common bus, but not all. Verify compatibility with your master controller's manual before integrating multiple station types.

Q: What happens if I exceed the 980-foot wiring distance?

A: Audio quality will degrade, and call dropout may occur. If your deployment requires longer runs, install a repeater or intermediate amplifier (check your master controller documentation), or use a second independent bus.

Q: Is the GF-1DK suitable for outdoor gatehouse or cold-storage environments?

A: The GF-1DK is rated for 32–104°F (0–40°C) indoor operation only. For outdoor or temperature-extreme deployments, select a hardened or heated enclosure and verify your entire system (master unit, wiring, handsets) is rated for that environment.

Q: Does the GF-1DK include a handset, speaker grille, or mounting bracket?

A: Station-only units typically ship without accessories. Confirm your order contents with your supplier before installation—handsets, wall plates, and trim rings are usually ordered as separate line items.

Karl Wilson

The Aiphone GF-1DK is a straightforward intercom station that deserves respect for what it is: a topology-efficient tenant unit for multi-family and small office deployments where infrastructure cost and installation simplicity matter more than advanced features. The real win is that 2-conductor common-bus topology—that single wire pair, rated to carry signal 980 feet at 20AWG, cuts your cabling footprint roughly in half compared to discrete station runs on traditional parallel wiring.

Technical Highlights:

• 980 Feet at 20AWG (2-conductor bus): That's a meaningful distance advantage for sprawling complexes. If you're running a 600-foot retrofit through existing conduit, the GF-1DK will reach the far corner of a building without a repeater. Aiphone spec #87200250C (11.05 pf/ft) ensures predictable signal propagation—don't substitute cheaper cable and expect the same performance.
• 2 Stations Per Location on One Bus Drop: Reduces the number of panel terminations and wall penetrations your electrician has to cut. In a 40-unit apartment complex, that's 40 drops instead of 80. Real labor savings on both rough-in and trim phases.
• Operating Temp 32–104°F (0–40°C): Suitable for climate-controlled residential and office spaces. Not rated for basements in unheated seasonal buildings, gatehouse stations, or any deployment where the environment can dip below freezing or spike above 104°F. Check your master controller's temp rating too—it's often the limiting factor.

Deployment Considerations:

• The GF-1DK is a slave component only. It will not function without a compatible Aiphone GF series master unit supplying power and call control. If you inherit an old Aiphone system, verify the master can support GF-1DK stations before ordering. Bus incompatibilities exist.
• A single fault on the common bus drops all downstream stations—plan your topology with test points and consider a second independent bus for critical access points if availability is a concern. Daisy-chain, don't star; a break in the middle doesn't cripple the far end.

The GF-1DK is the right choice for residential retrofit work, phased multi-family builds where you're adding tenant units incrementally, and office complexes running pure intercom without video or sophisticated access control. If your spec calls for entry-level IP-based intercoms or cloud-connected visitor management, this is not the product. But for a low-cost, electrically straightforward, long-distance tenant station on proven Aiphone infrastructure, the GF-1DK earns its place in the spec.