Description
CalAmp LMU-4350LB — Advanced Global LTE Cat-1 Telematics Gateway with Dual CAN, BLE 5.2 & EdgeApp
The CalAmp LMU-4350LB is a next-generation advanced in-cab telematics gateway designed for commercial fleets, trucking, logistics, government fleets, K-12 transportation, field services, utilities, and other sophisticated vehicle-data applications. Introduced by CalAmp in 2025, the platform combines global LTE Cat-1 connectivity with 3G/2G fallback, multi-constellation GNSS, dual CAN vehicle interfaces, Bluetooth Low Energy 5.2, extensive high-capacity I/O, dual 1-Wire interfaces, dual TTL serial ports, USB connectivity, an integrated accelerometer and gyroscope, PEG2™ programmable logic, and the EdgeApp SDK. (CalAmp)
The LMU-4350LB is designed as much more than a GPS tracker. CalAmp built the platform around sensor fusion and edge computing, allowing wired vehicle data, wireless BLE peripherals, external sensors, GNSS information, and custom application logic to be combined within a single telematics gateway. This architecture makes it particularly suitable for organizations requiring customized fleet intelligence, vehicle diagnostics, compliance applications, predictive maintenance, and specialized operational workflows. (CalAmp)
Global LTE Cat-1 Connectivity with 3G/2G Fallback
The LMU-4350LB provides global LTE Cat-1 connectivity together with 3G and 2G fallback, giving fleet operators and solution providers broad regional deployment capability. (CalAmp)
CalAmp specifies the following LTE Cat-1 bands:
B1 / B2 / B3 / B4 / B5 / B7 / B8 / B9 / B12 / B13 / B14 / B18 / B19 / B20 / B25 / B26 / B28
The gateway also supports 3G bands:
B1 / B2 / B4 / B5 / B6 / B8 / B19
and 2G bands:
B2 / B3 / B5 / B8. (CalAmp)
This multi-generation cellular architecture makes the LMU-4350LB particularly useful for global or geographically diverse fleet deployments where network technologies and available frequency bands may differ by region.
Advanced Multi-Constellation GNSS
The LMU-4350LB incorporates a 55-channel multi-constellation GNSS receiver supporting:
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GPS
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GLONASS
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BeiDou
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Galileo (CalAmp)
CalAmp specifies 5.0-meter CEP-50 positioning accuracy, GNSS tracking sensitivity of -161 dBm, cold-start acquisition sensitivity of -145 dBm, and hot-start acquisition sensitivity of -156 dBm. (CalAmp)
The GNSS engine supports location updates at rates of up to 5 Hz, providing frequent position information for moving fleet vehicles.
The LMU-4350LB also provides:
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Anti-jamming detection
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Assisted GPS (AGPS) location assistance (CalAmp)
These capabilities provide the positioning foundation for real-time vehicle tracking, route history, dispatching, geofencing, fleet utilization, driver monitoring, theft recovery, and other location-based telematics applications.
Dual CAN Vehicle Bus Architecture
One of the most important capabilities of the LMU-4350LB is its dual CAN bus architecture, allowing the gateway to support both light-duty and heavy-duty vehicle applications. CalAmp specifically highlights dual CAN as one of the platform's core capabilities. (CalAmp)
For light-duty vehicles, CalAmp specifies support for:
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J1850 PWM
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J1850 VPW
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SW-CAN
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ISO 9141-2
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KWP2000
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ISO 15765 CAN (CalAmp)
For heavy-duty vehicles, the platform supports:
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SAE J1939
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J1708 (CalAmp)
This broad protocol support allows the LMU-4350LB to address vehicles ranging from passenger cars and service vans to commercial trucks and other heavy-duty fleet vehicles.
Advanced Vehicle Diagnostics
Because the LMU-4350LB can interface directly with supported light- and heavy-duty vehicle networks, it can become an important source of vehicle diagnostic and operational data.
CalAmp identifies applications including remote diagnostics, predictive maintenance, fuel management, compliance, and operational monitoring. In trucking and logistics deployments, CalAmp specifically highlights remote diagnostics, predictive maintenance, ELD compliance, asset pairing, and fuel-efficiency tracking. (CalAmp)
This allows the LMU-4350LB to function as a true vehicle-data gateway, combining diagnostic information with location, motion, peripheral sensor data, and programmable edge logic.
Extensive High-Capacity I/O
The LMU-4350LB provides an unusually extensive collection of general-purpose inputs and outputs for an in-vehicle telematics gateway.
CalAmp specifies:
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1 fixed-bias ignition input
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7 configurable digital inputs
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5 digital outputs
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5 analog inputs
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2 1-Wire interfaces
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2 TTL serial interfaces
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Multiple switched-power outputs (CalAmp)
The seven digital inputs support selectable high- or low-bias operation across 0–30 VDC.
The five digital outputs are open-collector relay-driver outputs rated at 200 mA.
The five general-purpose analog inputs accept 0–30 VDC signals with specified accuracy of ±250 mV. (CalAmp)
This substantial I/O capacity makes the LMU-4350LB particularly appropriate for sensor-rich fleet installations.
Advanced Switched Power Outputs
The gateway provides several switched-power resources for connected peripherals:
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1 switched VIN output — 1 A fused
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2 switched 3.3 V outputs — 200 mA each
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1 switched LED driver — 20 mA (CalAmp)
These outputs provide additional flexibility when designing sophisticated vehicle installations involving external sensors, indicators, accessories, or other compatible peripheral equipment.
Dual 1-Wire Interfaces
The LMU-4350LB provides two 1-Wire 1-bit bus interfaces, an important expansion over many conventional telematics devices that provide only one. (CalAmp)
1-Wire interfaces can be used with compatible identification and sensor peripherals, making them valuable in fleet applications involving driver identification, temperature sensing, or other specialized monitoring requirements.
Dual interfaces give system integrators additional flexibility when multiple compatible peripherals need to become part of the telematics installation.
Dual TTL Serial Interfaces
The gateway provides two TTL serial interfaces, each using a 5-pin connector. (CalAmp)
Serial connectivity allows the LMU-4350LB to exchange data directly with compatible third-party peripherals and specialized fleet hardware.
CalAmp also identifies the 134364-Ser TTL-to-DB9 cable among the available accessories, providing a path for interfacing compatible serial equipment. (CalAmp)
USB Host & USB Device Connectivity
The LMU-4350LB provides substantial peripheral connectivity through dedicated auxiliary ports.
CalAmp specifies:
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AUX1 — 5-pin Molex
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AUX2 — 5-pin Molex
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AUX3 — USB Micro
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AUX4 — USB Type-A Host (CalAmp)
The presence of a USB Type-A host interface further expands the gateway's ability to support compatible peripherals and specialized applications.
Bluetooth Low Energy 5.2
Integrated Bluetooth Low Energy 5.2 provides short-range wireless connectivity for compatible sensors, tags, peripherals, and accessories. (CalAmp)
BLE connectivity allows the LMU-4350LB to integrate wireless sensor information alongside wired I/O and vehicle-bus data. CalAmp describes this architecture as enabling sensor fusion, seamlessly combining wired and wireless inputs for fleet and asset management. (CalAmp)
This makes BLE particularly useful for applications involving cargo sensors, driver identification, equipment tags, wireless environmental sensors, and other peripheral devices.
Integrated 3-Axis Accelerometer & Gyroscope
The LMU-4350LB incorporates both a three-axis accelerometer and gyroscope. (CalAmp)
Combining these motion sensors with GNSS and vehicle-bus information allows telematics applications to capture significantly more context about vehicle movement and operating conditions.
Depending on the application logic and configuration, motion information can contribute to applications involving driver behavior, safety events, movement detection, vehicle dynamics, and other event-based telematics workflows.
ThreadX Multithreaded Real-Time Operating System
The LMU-4350LB runs ThreadX RTOS, which CalAmp describes as a multithreaded, event-driven operating system designed for real-time processing, parallel execution, and minimal latency. (CalAmp)
This real-time architecture is important because modern telematics gateways may simultaneously need to process:
vehicle CAN data, GNSS information, cellular communications, BLE peripherals, digital and analog sensors, motion information, serial devices, geofence events, and custom application logic.
The multithreaded platform enables these different telematics subsystems to operate concurrently.
EdgeCore Firmware
The LMU-4350LB is part of CalAmp's EdgeCore product family.
CalAmp describes EdgeCore as a modular firmware platform providing granular control over telematics subsystems through the EdgeApp developer environment. (CalAmp)
The architecture allows solution providers to develop specialized applications that execute directly on the telematics gateway instead of relying entirely on remote cloud processing.
CalAmp's 2025 launch announcement specifically notes that the LMU-4350LB provides expanded edge programmability and code space, allowing customers to develop and execute custom applications and logic directly on the device. (CalAmp)
PEG2™ Programmable Event Generator
The LMU-4350LB incorporates PEG2™ — Programmable Event Generator, CalAmp's customizable logic engine for intelligent event detection and precise device behavior. (CalAmp)
PEG2 allows system designers to create logic governing how the gateway reacts to different operating conditions.
CalAmp notes that organizations can create rules governing when information is reported or when alerts are generated, helping support fleet-specific safety, regulatory, operational, and reporting requirements. (CalAmp)
This enables supported information from GNSS, CAN, sensors, I/O, motion detection, and connected peripherals to be processed locally before being sent to the cloud.
EdgeApp SDK for Custom Applications
For requirements beyond configurable PEG2 logic, the LMU-4350LB provides the EdgeApp SDK, enabling developers to build custom applications and specialized features that execute directly at the edge. (CalAmp)
This is a major differentiator from conventional GPS tracking devices.
Custom edge applications can allow a telematics solution provider to tailor the gateway around specific operational requirements while controlling how vehicle and sensor data is collected, processed, and shared.
CalAmp identifies potential processing areas including location, safety events, diagnostics, sensor readings, and predictive analytics. (CalAmp)
Advanced Onboard Geofencing
The LMU-4350LB supports locally stored geofence information for real-time geospatial processing directly on the device.
CalAmp specifies:
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21 rectangular or radial zones
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Up to 5,400 radial zones or vertices (CalAmp)
Onboard geofence processing allows location-based events to be evaluated locally without requiring every geographic decision to be performed by a remote cloud platform.
This can support applications involving customer-site arrival/departure, unauthorized movement, route compliance, school transportation, job sites, service territories, and restricted operating areas.
20,000-Message Onboard Buffer
The LMU-4350LB can buffer up to 20,000 messages internally. (CalAmp)
Message buffering is particularly important for commercial vehicles that may temporarily operate outside reliable cellular coverage.
Supported telematics information can be retained locally during connectivity interruptions and subsequently transmitted when network service becomes available, helping preserve a more complete operational history.
1100 mAh LiFePO₄ Backup Battery
The LMU-4350LB incorporates an 1100 mAh Lithium Iron Phosphate (LiFePO₄) internal backup battery. (CalAmp)
CalAmp lists battery certifications including:
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IEEE 1725-2011
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UL 1624
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UN 38.3
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IEC 62133 (CalAmp)
The specified charging-temperature range is 0°C to +45°C.
Backup power provides continued device operation when primary vehicle power is interrupted and can be especially valuable for fleet security, power-disconnection detection, and other applications where loss of primary power is itself an important event.
Low-Power Vehicle Operation
The LMU-4350LB provides multiple power-management states to reduce electrical demand on the vehicle.
CalAmp specifies typical consumption of:
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800 µA at 12 V — deep sleep
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10 mA at 12 V — radio-active sleep
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90 mA at 12 V — GPS tracking and cellular enabled (CalAmp)
Deep-sleep functionality is especially important for fleet vehicles that may remain parked for extended periods.
12/24-Volt Vehicle Electrical Architecture
The LMU-4350LB is designed for both 12 V and 24 VDC vehicle electrical systems.
CalAmp specifies:
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9–32 VDC during startup and normal operation
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7–35 VDC momentary operating range (CalAmp)
This broad electrical range supports deployment across many light-, medium-, and heavy-duty vehicle platforms.
Flexible Connector Architecture
The LMU-4350LB provides an extensive physical interface architecture:
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4-pin Molex — power, ground, ignition and ADC
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22-pin, 3 mm-pitch connector — general I/O and switched power
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16-pin, 3 mm-pitch connector — vehicle BUS interface
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Two 5-pin Molex auxiliary connections
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USB Micro
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USB Type-A Host
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Externally accessible 4FF SIM (CalAmp)
This extensive connector arrangement reflects the LMU-4350LB's role as a high-capacity vehicle telematics and sensor gateway, rather than a basic GPS tracker.
Internal Cellular, GNSS & BLE Antennas
The LMU-4350LB incorporates:
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Internal cellular antenna
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Internal GNSS antenna
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Internal BLE antenna (CalAmp)
The integrated antenna design simplifies installation and makes the LMU-4350LB the internal-antenna member of the LMU-435x family.
For installations requiring externally positioned antennas, the related LMU-4351LB provides the corresponding external-antenna architecture.
Compact In-Cab Design
Despite its extensive I/O, dual CAN capability, peripheral interfaces, edge-computing resources, and 1100 mAh battery, the LMU-4350LB maintains a relatively compact enclosure.
CalAmp specifies dimensions of:
138 × 89 × 22 mm
5.43 × 3.5 × 0.87 inches
Weight is approximately:
163 g / 5.7 oz. (CalAmp)
These dimensions allow the gateway to be installed within the vehicle cabin while supporting substantially more connectivity than a conventional compact tracker.
Four Integrated Status LEDs
The LMU-4350LB incorporates four visual status indicators for:
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GPS
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Cellular
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Bluetooth
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VBU (CalAmp)
These indicators assist installers and technicians during installation, commissioning, and troubleshooting.
Extreme-Temperature Fleet Operation
CalAmp specifies a particularly broad primary-power operating range for the LMU-4350LB:
-40°C to +75°C while connected to primary power. (CalAmp)
When operating on the internal battery, the specified range is:
-20°C to +60°C.
CalAmp specifies humidity tolerance of less than 85% RH at +55°C, non-condensing. (CalAmp)
Fleet-Grade Shock, Vibration & ESD Protection
The LMU-4350LB is engineered for professional vehicle environments.
CalAmp specifies:
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SAE J1455 vibration
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MIL-STD-810F vibration
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SAE J1455 shock
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MIL-STD-202G, 30G shock
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IEC 61000-4-2, 4 kV ESD protection (CalAmp)
These environmental specifications support deployment in commercial fleet environments where continuous vibration, shock, temperature variation, and automotive electrical conditions are normal.
CalAmp Device Management & OTA Updates
The LMU-4350LB supports CalAmp Device Management, enabling organizations to remotely configure, monitor, and deploy OTA software updates across connected vehicle and asset networks. (CalAmp)
This capability is particularly valuable for large geographically distributed fleets because configuration and software-management tasks can be performed without physically accessing every installed gateway.
CalAmp Telematics Cloud & API Integration
The gateway also supports CalAmp Telematics Cloud, which CalAmp describes as secure, API-ready cloud infrastructure for streaming real-time telematics information into enterprise systems. (CalAmp)
CalAmp's service model allows organizations to deploy the LMU-4350LB as hardware-only, with cloud-based telematics data streaming, or as part of a fully integrated application solution. (CalAmp)
This flexibility is especially useful for telematics solution providers developing their own fleet-management or IoT platforms.
Compatible CalAmp Cables & Accessories
CalAmp currently identifies several accessories specifically for the LMU-4350LB:
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5C888 — 4-pin power cable
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5C889 — 22-pin I/O harness
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134364-Ser — 5-pin TTL-to-DB9 serial cable
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5C734M-2 — 2-meter OBD-II connector
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5C709M — 2-meter J1939 Type 2 connector
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5C970M-2 — 2-meter J1708 connector
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5C744-275 — 2.75-meter RP1226 connector (CalAmp)
CalAmp notes that additional cables and accessories are available for different light-, medium-, and heavy-duty vehicle installations.
Regulatory & Industry Certifications
CalAmp lists the LMU-4350LB with:
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FCC
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CE
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IC
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PTCRB
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RoHS
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Bluetooth SIG
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RCM (CalAmp)
Carrier and regulatory compatibility should still be confirmed for the exact regional SKU and intended deployment.
Key Technical Features
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Global LTE Cat-1 cellular connectivity with 3G/2G fallback
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LTE bands B1/B2/B3/B4/B5/B7/B8/B9/B12/B13/B14/B18/B19/B20/B25/B26/B28
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Four-constellation GPS/GLONASS/BeiDou/Galileo GNSS
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55-channel GNSS receiver
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5.0 m CEP-50 location accuracy
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-161 dBm GNSS tracking sensitivity
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Up to 5 Hz location updates
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Anti-jamming detection
-
AGPS assistance
-
Dual CAN vehicle-bus support
-
Light-duty J1850 PWM/VPW, SW-CAN, ISO 9141-2, KWP2000 and ISO 15765 CAN
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Heavy-duty J1939 and J1708
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Bluetooth Low Energy 5.2
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1 fixed-bias ignition input
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7 configurable digital inputs
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5 × 200 mA digital outputs
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5 × 0–30 VDC analog inputs
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Dual 1-Wire interfaces
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Dual TTL serial interfaces
-
USB Micro interface
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USB Type-A Host
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Switched VIN output, 1 A fused
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Two switched 3.3 V outputs
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Switched LED-driver output
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Built-in 3-axis accelerometer and gyroscope
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ThreadX multithreaded RTOS
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EdgeCore firmware
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PEG2™ programmable event logic
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EdgeApp SDK for custom applications
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21 rectangular or radial onboard geofences
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Up to 5,400 radial zones or vertices
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Up to 20,000 buffered messages
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1100 mAh LiFePO₄ backup battery
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Typical 800 µA @ 12 V deep sleep
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12/24 V vehicle compatibility
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9–32 VDC normal operating range
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7–35 VDC momentary range
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Externally accessible 4FF SIM
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Internal cellular, GNSS and BLE antennas
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Dimensions: 138 × 89 × 22 mm
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Weight: 163 g / 5.7 oz
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Primary-power operation from -40°C to +75°C
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SAE J1455 / MIL-STD environmental testing
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CalAmp Device Management and OTA updates
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CalAmp Telematics Cloud/API integration
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FCC, CE, IC, PTCRB, RoHS, BT SIG and RCM certifications (CalAmp)
Ideal Applications
The CalAmp LMU-4350LB is particularly well suited for commercial fleets, trucking and logistics, government vehicles, public works, utilities, field-service fleets, K-12 and school-bus transportation, light- and heavy-duty fleet diagnostics, driver identification, fuel management, ELD-related integrations, remote diagnostics, predictive maintenance, cargo and sensor monitoring, fleet compliance, and customized enterprise telematics applications. CalAmp specifically identifies commercial/government fleets, student transportation, trucking, logistics, field services, and utilities among the target applications. (CalAmp)
Its combination of global LTE Cat-1 with 3G/2G fallback, multi-constellation GNSS, dual CAN, BLE 5.2, seven digital inputs, five outputs, five analog inputs, dual 1-Wire and TTL interfaces, USB host connectivity, accelerometer and gyroscope sensing, PEG2 logic, EdgeApp SDK, onboard geofencing, 20,000-message buffering, and an 1100 mAh LiFePO₄ battery makes the LMU-4350LB especially appropriate for customers who need a highly expandable vehicle-data and edge-computing gateway, rather than a basic GPS tracking device. (CalAmp)
CalAmp LMU-4350LB — Official Product Specifications
Official CalAmp LMU-4350LB Specification Sheet (PDF)
SKU DESCRIPTION: LMU4350, LTE CAT 1, BLE, VBU, 1000MAH BATT, INT ANT, LOAD DUMP, GEN-HW