A two-camera system may be enough for a service van.

It may not be enough for a box truck with large side blind spots, a school bus that requires cabin visibility, or a commercial vehicle that regularly backs into loading areas.

The practical question is not simply:

How many cameras can the dash cam support?

The better question is:

Which areas must the fleet be able to review after an incident?

Jimi IoT offers several commercial dash cam configurations for different vehicle types and risk levels. The JC261 supports two channels, the JC371 supports up to three 1080p cameras, and the JC450 Series can record four or five channels simultaneously.

This guide compares the three models based on published product specifications, installation requirements, storage, camera placement, and common fleet deployment questions.

Quick Comparison

Model	Camera Configuration	Video Resolution	Local Storage	Recommended Use	Main Limitation
JC261	Built-in front camera plus one optional camera	Front: 1080p; optional cameras: generally 720p	TF card up to 256GB	Service vans, taxis, ride-hailing vehicles, local delivery fleets	The second camera must be assigned to the driver, cabin, side, or rear, leaving the other areas uncovered
JC371	Up to three cameras	Up to three 1080p channels	128GB built-in eMMC plus expandable TF storage	Regional trucks, logistics fleets, hazmat vehicles, taxis and commercial passenger vehicles	Optional DMS and other functions depend on the selected camera and configuration
JC450 Series	One built-in camera plus up to four optional cameras; four or five channels recorded simultaneously	Main camera: 1080p; listed optional cameras are generally 720p	Two TF card slots, up to 512GB total	Box trucks, buses, school buses, hazmat trucks and vehicles requiring side or rear coverage	More cameras require more installation time, cable routing, storage planning and configuration

The right model depends less on fleet size than on the vehicle’s operating environment.

A fleet with 100 compact service vans may only need two channels per vehicle. A fleet with 20 large box trucks may need four or five.

JC261: A Practical Two-Channel Setup

The JC261 includes a built-in 1080p road-facing camera and supports one optional peripheral camera.

The second camera can be selected for:

• Driver monitoring
• Cabin visibility
• Rear visibility
• Side visibility

This flexibility makes the JC261 suitable for vehicles with one clearly defined secondary risk.

Suitable deployment examples

A service company may install:

• Front camera for road incidents
• Driver-facing camera for distraction and fatigue review

A local delivery fleet may use:

• Front camera for traffic evidence
• Rear camera for backing and loading-area incidents

A taxi or ride-hailing fleet may choose:

• Front camera for road conditions
• Cabin camera for passenger disputes and driver protection

Installation advantages

Among the three models, the JC261 generally involves the simplest camera layout.

The main unit requires a B+, ACC and ground connection. The optional camera adds one additional mounting position and cable route. Because there is only one peripheral view to configure, installation and post-installation review are relatively straightforward.

The JC261 American version supports relevant North American LTE bands and carries FCC certification.

Real limitation

Two channels still mean making a choice.

A rear-facing camera cannot simultaneously provide a dedicated driver view. A driver-facing camera does not capture a side collision. Before ordering the optional camera, the fleet must decide which unanswered question creates the greatest operational risk.

The JC261 works best when the fleet’s incident pattern is already clear.

JC371: Three Full-HD Views With Built-In Storage

The JC371 supports up to three 1080p cameras.

A common commercial configuration is:

1. Road-facing camera
2. Driver- or cabin-facing camera
3. Side- or rear-facing camera

The device also includes 128GB of built-in eMMC storage and supports additional TF card storage. The built-in storage provides a recording layer even before external memory is added.

The North American version supports LTE bands intended for the region and is listed with PTCRB and FCC certifications.

Suitable deployment examples

For a regional truck:

• Front view
• Driver view
• Passenger-side blind-spot view

For hazardous-material transportation:

• Road view
• DMS driver view
• Rear or cargo-related view

For a commercial passenger vehicle:

• Road view
• Driver view
• Cabin view

Installation advantages

The JC371 uses an integrated antenna design, which reduces some of the external wiring associated with separate antenna installation.

It can therefore provide broader coverage than the JC261 without immediately moving to a full five-camera layout.

AI and event features

Depending on the selected configuration, the JC371 supports ADAS and optional DMS functions.

Published functions include alerts related to:

• Forward collision risk
• Following distance
• Lane departure
• Pedestrian collision risk
• Phone use
• Smoking
• Distraction
• Yawning
• Closed eyes
• Driver absence

Configurable events such as speeding or SOS activation can also trigger the recording and upload of video clips or still images.

Real limitations

The phrase “supports three cameras” does not mean every camera and AI feature is included in the standard package.

The final system depends on:

• Selected peripheral cameras
• Camera compatibility
• Required viewing angle
• DMS requirements
• Installation position
• Platform and event configuration

The fleet should finalize the camera list before quoting installation time or total project cost.

JC450 Series: Wider Coverage for Larger Vehicles

The JC450 Series is designed for vehicles that require several simultaneous views.

It includes one built-in front camera and supports up to four optional cameras. Four or five channels can be recorded at the same time.

A typical five-channel truck configuration may include:

1. Road-facing view
2. Driver or cabin view
3. Left-side view
4. Right-side view
5. Rear or cargo-area view

This makes the JC450 more suitable for large commercial vehicles with several blind spots or multiple monitoring requirements.

Suitable deployment examples

For a box truck:

• Road
• Driver
• Left side
• Right side
• Rear loading area

For a school bus:

• Road
• Driver
• Passenger cabin
• Entry area
• Rear

For a hazmat vehicle:

• Road
• Driver
• Both sides
• Rear or cargo area

Storage for multi-camera recording

The JC450 main unit includes two TF card slots. Each supports up to 256GB, providing up to 512GB of total local storage.

Under the configuration stated in Jimi IoT product materials, the system can retain up to approximately seven days of footage while five camera channels are recording simultaneously. Actual retention depends on recording hours, camera configuration, storage settings and operating conditions.

Critical clips triggered by selected events or the in-cab SOS button can be uploaded to the platform, helping prevent important evidence from being lost through normal loop recording.

Interfaces and expansion

Compared with a simpler two-channel dash cam, the JC450 also provides more interfaces for peripheral equipment and vehicle integrations.

Published interfaces include:

• SOS input
• RS232
• TTL
• Relay
• Digital inputs
• CVBS output
• Wi-Fi
• Bluetooth

This provides more flexibility for larger telematics projects, but it also means deployment planning is more important.

Real limitations

Five channels do not mean five identical 1080p cameras.

The JC450’s built-in main camera is specified at 1080p, while the listed optional cameras are generally 720p and differ in field of view, low-light performance, installation environment and intended use.

Adding cameras also increases:

• Cable-routing requirements
• Installation time
• Local storage consumption
• Video review volume
• Cellular data use when more clips are uploaded
• The number of possible installation and configuration errors

The JC450 should therefore be deployed around a documented camera plan rather than installing five cameras simply because five channels are available.

Camera Placement Should Follow Incident History

Before selecting a model, review the fleet’s recent incidents and claims.

A useful internal review may look like this:

Incident Type	Frequency	Missing Evidence	Recommended View
Front collision	High	Vehicle movement before impact	Road-facing camera
Driver distraction complaint	Medium	Driver behavior before event	Driver-facing or DMS camera
Right-side contact	High	Passenger-side blind spot	Right-side exterior camera
Backing damage	Medium	Area behind vehicle	Rear camera
Cargo dispute	Low	Access to cargo area	Cargo-facing camera

This approach prevents unnecessary camera installations.

For example, a fleet whose claims mainly involve backing incidents may gain more value from a rear camera than from an additional cabin camera.

A Practical Installation Workflow

A multi-camera deployment should not begin with mounting hardware. It should begin with a vehicle and risk assessment.

Step 1: Define the evidence requirement

For each vehicle class, list the questions the video system must answer:

• What happened on the road?
• Was the driver attentive?
• Did another vehicle enter a blind spot?
• What happened behind the truck?
• Who accessed the passenger or cargo area?

Step 2: Select compatible cameras

Confirm that each peripheral camera is compatible with the selected dash cam model.

Also check:

• Indoor or outdoor installation
• Required field of view
• Low-light requirements
• Waterproof rating
• Cable length
• Mounting position
• AI or DMS compatibility

An interior infrared camera and an exterior blind-spot camera should not be treated as interchangeable simply because both use one channel.

Step 3: Test the equipment before permanent installation

Before routing cables through the vehicle:

• Insert the SIM and storage card
• Power on the main unit
• Confirm GNSS and cellular status
• Connect every camera
• Check that all channels appear on the platform
• Verify date and time settings
• Trigger a test event
• Confirm that the clip can be retrieved

This reduces the risk of discovering a compatibility or activation problem after the vehicle interior has been disassembled.

Step 4: Mount and route cables

The main camera should have a clear road view without blocking the driver’s vision.

Peripheral camera cables should be:

• Protected from moving components
• Kept away from high-heat areas
• Secured against vibration
• Routed away from sharp edges
• Weather-protected when installed externally

Exterior cameras should use accessories designed for outdoor installation.

Step 5: Run a controlled road test

After installation, drive the vehicle through normal operating conditions.

Check:

• Daytime image quality
• Night or low-light visibility
• Camera vibration
• Side and rear blind spots
• Audio quality where permitted
• GPS route recording
• Event detection
• Video upload
• Playback through the platform

A camera may look correctly positioned while the truck is parked but fail to show the intended area during a turn, lane change or loading operation.

Step 6: Review the pilot before scaling

Do not install the system across the full fleet based only on a successful bench test.

A practical first phase is to equip a small group representing different vehicle types and routes.

During the pilot, record:

Pilot Metric	How to Measure It
Installation time	Hours required per vehicle
Video availability	Percentage of required clips successfully retrieved
Cellular performance	Failed or delayed video uploads
Storage retention	Number of days available before loop recording
Alert usefulness	Useful events compared with unnecessary alerts
Camera coverage	Incidents or maneuvers still outside the field of view
Driver feedback	Visibility concerns, alert volume and usability
Support workload	Number and type of installation or platform issues

These figures create genuine deployment data for the purchasing decision. They are more useful than relying only on a product specification sheet.

Common Fleet Questions

1. Can the same configuration be used across the entire fleet?

Usually not.

A service van, box truck and school bus have different blind spots, interiors and operating risks. The platform can be standardized, but camera layouts should normally be defined by vehicle class.

2. Which model is easiest to install?

The JC261 generally has the simplest layout because it uses one built-in camera and one optional camera.

The JC371 adds broader coverage while its integrated antenna design helps simplify part of the wiring.

The JC450 requires the most planning because it may include several remote cameras and additional peripheral connections.

3. Does live video work everywhere?

Live video and remote clip upload depend on the device’s cellular connection, SIM configuration, data service and local network coverage.

Local recording can continue when connectivity is limited, but remote access may be delayed until communication is restored.

4. Does every model include DMS?

No.

DMS availability depends on the product version, selected camera and configuration. For example, DMS is listed as optional on the JC261 and JC371.

The fleet should confirm the required driver-monitoring functions before ordering hardware.

5. Is a five-camera system always safer?

Not automatically.

Poor camera placement, incorrect configuration or excessive low-value alerts can reduce the usefulness of a larger system. A properly installed three-camera system may provide better evidence than five cameras mounted without a clear risk plan.

6. How much storage does the fleet need?

Storage requirements depend on:

• Number of channels
• Resolution
• Daily driving hours
• Recording settings
• Event frequency
• Required review period

Storage should be evaluated using the complete installed configuration, not the capacity of the main unit alone.

Which Model Should You Choose?

Choose the JC261 when:

• One road view and one additional view are sufficient
• Installation simplicity is a priority
• The fleet operates service vans, taxis or local delivery vehicles
• The main risk is clearly defined

Choose the JC371 when:

• The fleet needs up to three full-HD views
• Driver, road and one external or cabin view are required
• Built-in storage and North American cellular support are priorities
• The operation needs optional visual AI and event video

Choose the JC450 Series when:

• The vehicle has several blind spots
• Side, rear, cabin or cargo footage is required simultaneously
• The fleet needs four or five channels
• Expanded local storage and peripheral connections are important
• The fleet can support a more detailed installation and pilot process

Final Recommendation

Do not select a fleet dash cam by channel count alone.

Start with incident history, vehicle type and the evidence your team regularly struggles to obtain. Then compare camera compatibility, storage, installation complexity, connectivity and platform workflow.

For a simple two-view requirement, the JC261 may be the most practical choice.

For three full-HD views and a balance between coverage and installation, the JC371 may fit better.

For large vehicles requiring side, rear, driver and cargo visibility at the same time, the JC450 Series provides the broader configuration.

The best fleet camera system is not the one that records the most angles.

It is the one that consistently captures the angles your fleet actually needs—and allows the team to retrieve the evidence when an incident occurs.

Planning a dash cam pilot for your commercial fleet?

Share your vehicle types, operating routes and most common incident scenarios with Jimi IoT. Our team can help compare the JC261, JC371 and JC450 Series and recommend a camera configuration for your deployment.