Bosch Fixed dome 2MP 3.3-10.2mm I/O integrated mic - NDI-3702-A-IO

Bosch NDI-3702-A-IO Fixed Dome 2MP Varifocal Camera with I/O and Integrated Mic

Overview

The Bosch NDI-3702-A-IO is a 2MP fixed dome camera built for commercial interiors where you need flexible framing, integrated audio, and alarm I/O without running additional cabling. The 3.3–10.2mm motorized varifocal lens covers scenes from a wide 106° down to a tight 31.2° horizontal field — useful when you're committing to a mounting position before the final coverage requirement is locked. With a 1/2.8-inch CMOS sensor, 120dB wide dynamic range, and a 0.06 lux color sensitivity floor, this camera handles the mixed-lighting environments common in lobbies, corridors, and retail interiors. Bosch IP cameras are engineered for direct integration into enterprise VMS platforms via ONVIF Profiles S, G, M, and T — the NDI-3702-A-IO fits squarely in that lineup. For buyers evaluating the full Bosch surveillance line, this model sits in the entry-tier fixed dome segment with I/O expansion built in.

Key Features

• 2MP / 1080p Sensor: 1,920 x 1,080 effective pixels at up to 30 fps delivers HD evidence-grade footage — sufficient resolution for facial recognition at doorways and aisle coverage without overloading storage on every channel in the building.
• 3.3–10.2mm Varifocal Lens (f/1.6–f/3.29): The 3:1 zoom ratio lets installers dial in coverage from a wide entry view to a tighter corridor shot during commissioning. The f/1.6 maximum aperture at the wide end supports low-light performance without relying solely on gain.
• 120dB Wide Dynamic Range: In mixed-lighting scenes — a sun-blasted atrium adjacent to a dim back corridor — 120dB WDR retains usable detail in both zones simultaneously. This is the spec to check before deploying near glass storefronts or exterior-facing doorways on indoor dome cameras.
• 0.06 lx Color / 0.016 lx Mono Sensitivity: Color imaging holds down to 0.06 lux before the sensor transitions to monochrome at 0.016 lux — practical for dim corridors with minimal supplemental lighting.
• Built-in Microphone + Line-in/out: The integrated microphone eliminates a separate audio run in most installs. Line-in and line-out headers support external audio devices where the built-in mic isn't positioned ideally, enabling two-way audio configurations without additional hardware.
• 1 Alarm Input / 1 Alarm Output: The onboard I/O header connects directly to door contacts, PIR sensors, or strobe outputs — reducing the need for a separate I/O expander module on simple alarm-integration jobs. Wire your trigger device and output relay to the camera itself.
• MicroSD up to 2TB (SDHC/SDXC) + 5s Pre-Alarm Buffer: Local edge storage with a 5-second pre-alarm recording buffer means critical event footage is captured even if the network path to the NVR drops at the moment of an alarm. 2TB microSDXC support provides weeks of retention at 1080p depending on scene complexity and compression settings.
• H.265 / H.264 / M-JPEG Compression: H.265 cuts storage and bandwidth requirements roughly in half versus H.264 — meaningful across a multi-camera installation recording 24/7. M-JPEG remains available for VMS platforms that require intra-frame-only streams.
• PoE 802.3af/802.3at at 2.1–3W: Drawing only 2.1–3W via standard 802.3af PoE switches, this camera places minimal load on your switch power budget. A 24-port 802.3af switch with a 185W budget can comfortably drive 60+ of these units — no 802.3at upgrade required.
• ONVIF Profile S, G, M, T: Profile G covers edge storage and event retrieval; Profile T adds H.265 and HTTPS; Profile M extends metadata and analytics interoperability — covering the integration requirements of most enterprise VMS platforms without custom driver development.

Integration and Compatibility

The NDI-3702-A-IO supports ONVIF Profiles S, G, M, and T, providing broad compatibility with Milestone XProtect, Genetec Security Center, Bosch Video Management System, and other ONVIF-conformant platforms. The 24VAC ±10% alternative power input accommodates legacy analog infrastructure wiring where PoE infrastructure isn't available. For guidance on matching cameras to NVR channel capacity and storage planning, see the IP camera selection guide.

Frequently Asked Questions

Q: Does the NDI-3702-A-IO support edge recording if the network connection drops?

A: Yes. The camera includes a microSD slot supporting SDHC and SDXC cards up to 2TB, with a 5-second pre-alarm recording buffer. Local recording continues independently of network availability.

Q: What PoE standard does the NDI-3702-A-IO require?

A: The camera draws 2.1–3W and operates on standard IEEE 802.3af PoE. An 802.3at (PoE+) switch is not required, though the camera does accept 802.3at as well.

Q: Can the NDI-3702-A-IO be used outdoors?

A: No IP ingress protection rating is specified in the available evidence for this model. This camera is designed for indoor installations. Verify environmental ratings with the manufacturer before any outdoor deployment.

Q: What VMS platforms are compatible with the NDI-3702-A-IO?

A: The camera conforms to ONVIF Profiles S, G, M, and T, providing broad compatibility with major VMS platforms including Milestone XProtect, Genetec Security Center, and Bosch Video Management System. Confirm driver availability with your VMS vendor for specific feature support.

Q: Does the NDI-3702-A-IO have a built-in microphone?

A: Yes. The camera includes a built-in microphone as well as line-in and line-out connections for external audio devices, supporting both monitoring and two-way audio configurations.

Q: What is the field of view range on the NDI-3702-A-IO?

A: The 3.3–10.2mm varifocal lens provides a horizontal field of view from 106° (wide) to 31.2° (telephoto), with a vertical range of 55.2° to 17.5°. This lets you tune coverage from a broad entry-area view to a tighter corridor or counter shot during installation.

James Everett

The NDI-3702-A-IO is the model I recommend when an integrator needs onboard alarm I/O and a built-in mic on a budget dome without sourcing separate audio or I/O expander hardware. The 120dB WDR is the standout spec here — that's a wide enough range to handle the atrium-to-hallway transition that kills cheaper sensors, and at 2.1–3W draw it barely registers on a switch power budget.

Technical Highlights:

• 120dB Dynamic Range: Retains detail simultaneously in bright and dark zones of the same frame — critical at glass-fronted lobbies and retail entrances where cheaper 100dB WDR cameras blow out the exterior or crush the interior.
• MicroSDXC up to 2TB + 5s Pre-Alarm Buffer: Edge storage survives network outages, and the pre-alarm buffer means the 5 seconds before a trigger event are always captured — you won't get a recording that starts after the door already opened.
• ONVIF Profiles S, G, M, T: Profile G covers edge recording retrieval over the network; Profile T adds H.265 stream negotiation and HTTPS transport. Together they cover the integration requirements of virtually every enterprise-grade VMS without custom driver work.

Deployment Considerations:

• The 24VAC ±10% alternative input is genuinely useful on retrofit jobs where you're pulling legacy transformer-based power runs — no need to re-pull cable to the switch just for this camera.
• No IP rating is listed in the spec evidence: treat this as an indoor-only unit and do not deploy it in wet locations, parking structures, or under-eave positions without confirming housing requirements with Bosch directly.

This camera earns its place in commercial interior deployments — corporate lobbies, school corridors, retail floors — where you want alarm I/O and audio on every node without the additional hardware cost that typically comes with those features.