Comelit 2708W/A Door-Entry Phone for SimpleBus

Overview

The Comelit 2708W/A is a wall-mounted door-entry telephone designed for integration with Comelit SimpleBus intercom and access control systems. This two-button configuration provides straightforward call routing and access control signal capability within SimpleBus architectures. Built for installations that require durable, weather-sealed hardware, the 2708W/A supports both indoor and outdoor deployment scenarios typical of residential and light commercial access points.

Key Features

• IP65 Weather Protection: Direct water spray and dust ingress won't compromise operation — meaning you can deploy this unit in exposed outdoor locations without concern for rain or seasonal moisture buildup. This rating sits between basic splash resistance and full submersion protection, making it suitable for covered overhangs, entry vestibules, and perimeter gate installations.
• IK08 Vandal Resistance: The housing resists impact up to 5 joules (roughly equivalent to repeated strikes with a 0.5 kg mass dropped from 1 meter). Relevant for unsecured or high-traffic access points where casual or deliberate tampering is a risk — particularly useful in multi-tenant, hospitality, and public-facing installations.
• Two-Button Configuration: Minimalist control scheme reduces complexity and support overhead. Buttons typically map to primary call functions and access grant/deny logic within SimpleBus, lowering training friction for end users and reducing field commissioning time.
• Wall-Mount Form Factor: Accommodates standard vertical installation at entry doors, gate pillars, and building perimeters. Fits typical weatherproof electrical enclosures and standard mounting brackets used across Comelit SimpleBus deployments.
• SimpleBus Ecosystem Integration: Works within Comelit's daisy-chainable twisted-pair backbone, eliminating the need for separate network infrastructure at the entry device. Power and signaling flow from the same bus, simplifying cabling runs in retrofit and new-build scenarios.
• Durable Construction: Corrosion-resistant materials and sealed entry points extend serviceable life in salt-air, high-humidity, and temperature-swing environments. Reduces replacement cycles and field service calls over a 5–10 year operating window.

Integration & Compatibility

The 2708W/A integrates directly into Comelit SimpleBus door-entry and access control installations. It pairs with Comelit master stations, video entry units, and control modules to create multi-unit intercom networks without requiring dedicated IP networking at the endpoint. Typical deployments include apartment buildings, small office complexes, gated communities, and light industrial perimeter access points where SimpleBus remains the backbone architecture.

When to Choose a Different Model

If your installation requires video verification at the entry point, look to Comelit's video door-entry models in the SimpleBus line — those add camera optics and are housed in similar ruggedized enclosures. If you need audio-only simplicity without access control buttons, a basic audio handset may reduce cost. If your environment demands full submersion tolerance (IP67/IP68) — such as splash zones near pools or car washes — specify a higher-rated enclosure or recessed housing.

Frequently Asked Questions

Q: Does the Comelit 2708W/A require separate power, or does it run off SimpleBus?

A: The 2708W/A draws power from the SimpleBus backbone itself — no separate 12V or PoE adapter is required at the unit. Power and signaling are combined on the same twisted pair, a key design advantage of SimpleBus topology.

Q: Can I use the 2708W/A outdoors year-round?

A: IP65 protection handles direct rain and dust, but sustained freezing conditions, salt spray, or extreme UV exposure may require periodic maintenance or protective overhangs. For coastal or severely corrosive environments, confirm material compatibility with your Comelit distributor.

Q: What's the button layout, and can it be customized?

A: The unit ships with two fixed buttons. Function mapping (e.g., call building manager, trigger gate opener) is configured at the SimpleBus control unit or master station, not at the 2708W/A itself. No in-device customization is available.

Q: Does the 2708W/A work with non-Comelit intercom systems?

A: No. The 2708W/A is purpose-built for SimpleBus and is not compatible with third-party intercom architectures. Verify that your existing system uses Comelit SimpleBus before specifying this unit.

Q: What's the warranty?

A: Refer to your Comelit distributor or the product datasheet for the specific warranty term. Comelit typically includes standard labor and parts coverage on door-entry hardware.

Q: How is the 2708W/A mounted?

A: Wall-mount installation via standard screws or weatherproof electrical box. Install at comfortable arm height (typically 48–60 inches) for accessibility and ease of operation. SimpleBus wiring connects via a weatherproof strain-relief connector at the rear.

Ted Perry

Perspective based on aggregated and affiliated engineering team experience.

The Comelit 2708W/A is a stripped-down, pragmatic choice for SimpleBus door-entry installations where durability and environmental resilience matter more than feature density. The IK08 vandal rating and IP65 weatherproofing pack real value into a minimal form factor — you're not paying for bells you won't use, and you're getting measurable impact resistance that will survive contact with shopping carts, weather, and the occasional fist.

Technical Highlights:

• IP65 + IK08 ratings: Combined protection against rain/spray and moderate impact (5 joules) means fewer field failures in unsecured or high-traffic entry points. This combination reduces replacement labor and downtime versus unrated indoor-only equivalents.
• SimpleBus power integration: No separate 12VDC supply required — the unit pulls power from the twisted-pair backbone. Reduces cabling complexity and eliminates a potential failure point (remote power supply), especially important in distributed multi-building campuses.
• Two-button simplicity: Function mapping happens at the master station, not the endpoint. This makes field swaps faster and reduces support overhead when button behavior needs to change.

Deployment Considerations:

• IP65 is splash and rain resistant but not fully submersion rated (IP67). If your site has standing water, recessed mounting, or seismic moisture risk, plan for a protective enclosure or higher-rated housing.
• SimpleBus is a closed ecosystem — verify your control architecture uses Comelit SimpleBus backbone before committing. No ONVIF or third-party integration path exists.

Deploy the 2708W/A in multi-tenant residential buildings, gated communities, and small commercial complexes where SimpleBus is already the backbone and you need rugged endpoint hardware that doesn't fail in the weather. It's not a feature showcase — it's a reliable workhorse for standard access control signaling in exposed locations.