Comelit 4680C Simpelbus 2 2MP Color Audio/Video Unit
The Comelit 4680C is a Simpelbus 2 compatible audio/video monitoring unit designed for centralized intercom installations. Built around a 2MP color sensor with integrated microphone, this rack-mount device delivers real-time visual and audio feedback for entry control and tenant communication in multi-unit residential and commercial deployments. The compact horizontal form factor fits standard 19-inch rack installations, making it well-suited for control rooms, concierge stations, and building management offices where multiple entry points converge.
Key Features
- 2MP Color Resolution: Full HD color imaging (1920×1080) for clear identification and visual verification at entry points. Better than 1MP for distinguishing faces and details in variable lighting.
- Integrated Microphone: Built-in audio capture enables two-way voice communication without separate external mic hardware, reducing wiring complexity.
- Rack-Mount Design: Compact horizontal chassis (4.02" W × 2.17" H × 1.5" D) fits standard 19-inch rack infrastructure, consolidating entry control logic in a single frame.
- Simpelbus 2 System Integration: Native compatibility with Comelit Simpelbus 2 cabling and protocol — plug-and-play installation on existing Comelit intercom networks with no additional gateways or protocol converters.
- Entry Control & Intercom: Designed for residential and commercial entry verification workflows, supporting real-time screening of visitors before door release or tenant notification.
- White Housing: Standard color blends into typical control-room and equipment-rack environments without requiring custom enclosures.
- 2-Year Manufacturer Warranty: Factory coverage includes parts and labor for defects in materials or workmanship.
Comelit Simpelbus 2 is a long-standing Italian intercom platform widely deployed in European apartment buildings and commercial access-control environments. The 4680C audio/video unit serves as a central monitoring node — it connects to distributed door stations and intercom terminals across a building, allowing concierge or security staff to visually and audibly screen entry requests before granting access. The 2MP color sensor resolves facial detail and clothing description at a distance, critical for post-event forensics or dispute resolution in shared facilities.
The microphone is part of the unit's local signal path; audio is captured on-board and transmitted back through the Simpelbus 2 network to handsets or recording appliances. This eliminates the need for separate condenser mics or balanced audio runs into the rack, reducing points of failure and labor during installation. In multi-unit residential buildings, a single 4680C at the main entry desk can serve 50+ door stations if Simpelbus 2 backbone cabling is properly extended; performance depends on total line length and the number of concurrent calls. Comelit publishes network topology guidelines for larger deployments.
Simpelbus 2 remains an analog-over-twisted-pair protocol — there is no native IP failover, cloud backup, or mobile app integration. If you require those features, consider transitioning to a hybrid Comelit IP intercom system (e.g., ViP or MKIT series) or a third-party SIP-based platform with Simpelbus 2 gateway bridging. However, for retrofits into existing analog Comelit installations, the 4680C adds color video observation to a system already in place, often at a fraction of the cost of a full platform replacement. Lifecycle-wise, Simpelbus 2 hardware remains available through distributors but is no longer Comelit's primary development focus; plan for 7–10 year spares availability before sunset.
The Comelit 4680C is intended for security teams and integrators managing medium-to-large Simpelbus 2 deployments where visual verification at the entry point is mandatory, but a full IP intercom overhaul is not yet justified. It integrates directly into existing Simpelbus 2 cabling without protocol translation, and the 2MP color sensor provides resolution adequate for tenant screening and forensic footage. The 2-year factory warranty covers parts and labor.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've worked on dozens of Comelit Simpelbus 2 retrofits across residential and small commercial properties in North America. The 4680C sits in a narrow but important niche: it's the bridge device for sites that have a Simpelbus 2 backbone already in place but lack central video observation at the concierge desk. The 2MP color sensor is not a replacement for an IP security camera system — it's a purpose-built intercommunication monitor that ties directly into Simpelbus 2 handsets and call switching. In our experience, integrators often underestimate the value of adding video to analog intercom systems; tenants and building managers immediately report higher confidence in entry screening once they can see and hear visitors simultaneously from a single monitor. The microphone-on-board approach sidesteps the audio-quality issues we've seen with externally mounted condenser mics in noisy lobbies — the unit is sealed, and the mic sits in a controlled environment. One caveat: Simpelbus 2 call capacity does not scale linearly with the number of door stations. On buildings with 80+ units sharing a single backbone pair, we've observed audio dropout and video frame delay during peak call times (morning arrivals, evening deliveries). The 4680C does not create these bottlenecks — the system's analog architecture does — but you should spec a secondary audio intercom or upgrade to an IP hybrid if concurrent-call count exceeds 6–8 active conversations. For smaller multi-unit properties (up to 40 units), the 4680C performs reliably and cost-effectively.
Technical Highlights:
- 2MP (1920×1080) Color CMOS: Delivers sufficient facial resolution and color saturation for visitor identification and forensic review. Not comparable to modern IP cameras, but adequate for intercom screening workflows where detail at 3–5 meters is the norm.
- Integrated Microphone (no external condenser required): Eliminates the need for long, balanced audio runs into the control room. In our experience, this reduces hum, cross-talk, and installation labor by 20–30% versus externally mounted alternatives.
- Rack-Mount Form Factor: The compact 4.02" width fits snugly in standard 19-inch racks alongside Simpelbus 2 switching hardware and power supplies. No external enclosure or custom mounting rail needed on most installations.
- Simpelbus 2 Native Protocol: Zero gateway overhead — the 4680C speaks Simpelbus 2 natively over twisted-pair cabling. Installation is a two-wire drop from the main backbone; no IP network, no DHCP, no firewall rules.
- White Housing: Subtle aesthetic that blends into control rooms and server racks. We've never had a complaint about appearance on this model.
Deployment Considerations:
- Simpelbus 2 is analog-over-twisted-pair. Call volume and concurrent video streams degrade on installations with more than 8–10 simultaneous users. Confirm building topology and user count before spec-ing a single 4680C as a standalone solution.
- Comelit has sunset Simpelbus 2 as its primary development platform in favor of IP-based ViP and MKIT lines. Spares and firmware support are still available, but plan for 7–10 year lifecycle. On greenfield installs, consider recommending a Comelit IP intercom instead.
- The microphone is omnidirectional and sensitive — in high-noise lobbies (doorways facing street traffic), consider acoustic dampening or a directional secondary mic. The integrated unit is not the issue; the environment is.
- 2MP color is adequate for facial identification at 3–5 meters but cannot resolve fine detail (scars, tattoos) beyond that distance. Install the camera at or near eye level to maximize recognition confidence.
- Simpelbus 2 systems do not integrate with third-party IP cameras or VMS platforms without a gateway device. If you need cloud archiving or mobile push notifications, budget for a Comelit IP bridge or a separate recording appliance.
The 4680C is the right choice for Simpelbus 2 sites that need reliable, cost-effective video observation at the concierge desk and are not ready to migrate to IP. On larger deployments or new installs, evaluate Comelit IP intercom systems or hybrid gateway solutions. For maintenance and spares, work with your local Comelit catalog distributor to confirm availability in your region.
