The core value of this series is connecting field devices to carrier cellular networks while providing local Ethernet and Wi-Fi connectivity. Using representative models from the official website as examples, TR-324 corresponds to 4G LTE and TR-325 to 5G LTE; the product-series catalog also covers different cellular generations. For multinational projects, support for local 2G/3G fallback, specific LTE/5G bands, carrier certification, and APN configuration should be confirmed in writing by sales according to the target country and module version. 1. Cellular network: TR-324 is designed for 4G LTE, while TR-325 is designed for 5G LTE. If a project requires multi-mode fallback or specific frequency bands, the target region, carrier, and module configuration must be verified. 2. Wi-Fi: The representative model pages list IEEE 802.11 a/b/g/n/ac and cover the 2.4 GHz and 5 GHz bands. Dual-band Wi-Fi can be used for nearby maintenance, local terminal access, or as a backup link; actual throughput varies with the chipset, channel bandwidth, environment, and model. 3. Wired Ethernet: Gigabit LAN is suitable for connecting PLCs, industrial switches, cameras, HMIs, edge devices, or local maintenance PCs to the same network. 4. Redundancy concept: Representative model pages mention dual-SIM standby and backup switching among wired, Wi-Fi, and cellular links. Dual SIM does not mean every model supports eSIM or automatic dual-carrier strategies; projects must confirm the SIM slots, switching policy, and service plan.

Representative models typically combine “cellular uplink + Gigabit Ethernet + industrial serial ports.” For devices such as energy meters, PLCs, variable-frequency drives, and environmental sensors, Ethernet, RS485, or RS232 can be selected according to the device interface. Routers are better suited to providing connectivity, forwarding, remote maintenance, and local network management; complex protocol acquisition/conversion requirements can be addressed together with an industrial gateway or protocol converter. 1. Ethernet ports: The top sections of the TR-324/325 pages both list a 2×LAN Gigabit configuration; the specification sections also contain descriptions of LAN0 supporting WAN/LAN auto-adaptation and three Gigabit LAN ports. The inquiry should therefore clearly specify “WAN/LAN quantity, Gigabit/100 Mbps, and whether switching is supported.” 2. Serial ports: The pages confirm RS485- and RS232-type interfaces for common industrial field devices. The exact port quantities are not presented consistently, so the BOM should explicitly lock down the number of RS485/RS232 ports, terminal definitions, isolation requirements, and termination-resistor requirements. 3. SIM and antennas: Representative model pages list dual-layer SIM slots and SMA antenna connectors. The quantity and gain of cellular and Wi-Fi antennas should be confirmed together with site coverage, cabinet installation, and lightning-protection requirements. 4. Power and installation: Representative models are rated for DC 12–36 V and include DC power input, reset, and status indication. The product introduction also describes DIN-rail mounting for deployment inside control cabinets.

The advantage of TR300-Class routers is not simply “Internet access,” but the combination of cellular WAN connectivity, field-device access, network redundancy, and industrial environmental adaptability in an engineering-ready connection node. The following six points are suitable for websites, proposals, or customer inquiry responses, but the product-selection note “confirm by model” should be retained. 1. Multi-mode cellular access: 4G or 5G models meet different bandwidth and latency requirements, while dual-SIM and multi-network redundancy can be confirmed on a project basis. 2. Gigabit local networking: Representative models provide Gigabit Ethernet for industrial switches, edge terminals, and local maintenance networks. 3. Industrial serial connectivity: RS485/RS232 helps connect legacy PLCs, meters, controllers, and smart meters, reducing the need for additional interface converters. 4. Remote network operation and maintenance: The router section of the official website mentions VPN support and remote management. The VPN types actually available, account permissions, remote upgrade functions, and platform capabilities must be confirmed according to the software version, project architecture, and security policy. 5. Link-continuity design: Representative pages mention dual-SIM standby and backup switching among cellular, Wi-Fi, and wired links to reduce the impact of a single unavailable network on data backhaul. 6. Adaptability to harsh environments: The TR-324/325 pages list operation from -40°C to +75°C, 5%–95% non-condensing humidity, and wide-voltage DC 12–36 V, making them suitable for industrial cabinets, protected outdoor enclosures, and utility facilities. For high-altitude, high-humidity, high-salt-fog, or high-voltage environments, product certification and enclosure-system design must be confirmed separately.

This series is particularly suitable for projects where “devices are distributed, on-site service is costly, and stable wide-area network backhaul is required.” The following six categories are typical directions; actual solutions should first complete signal testing, network-security design, power-supply evaluation, and protocol integration testing. 1. Industrial automation: Connect PLCs, HMIs, variable-frequency drives, or production-line control networks to enable status viewing, remote maintenance, and cross-site data backhaul. 2. Smart buildings: Connect building controllers, energy meters, HVAC plant rooms, or BMS subnets to upper-level platforms. 3. Outdoor environmental monitoring: Provide cellular backhaul for weather, dust, water-quality, and station sensors; waterproof enclosures, surge protection, and antenna solutions are also required. 4. Intelligent transportation: Used for distributed network nodes such as roadside equipment, parking systems, bus stops, and traffic monitoring. 5. Smart energy and power: Connect electricity meters, distribution monitoring devices, PV inverters, or energy-storage subsystems and transmit data to a central platform. 6. Smart robots and mobile equipment: Provide cellular network access for mobile or remote equipment in warehouses, campuses, construction machinery, and similar scenarios; bandwidth, roaming, coverage, and security policies must be validated on site.

Representative model pages list multiple power-metering and industrial protocols, including DL/T 645-2007, IEC 62056-21, IEC 1107, IEC 61850, DLMS, as well as Modbus RTU, Modbus TCP, BACnet, M-Bus, and OPC UA. Note that the router’s fundamental role is network transmission and remote connectivity. Whether it can “directly parse, acquire, or convert” a specific protocol also depends on the purchased model’s software functions, the peer device, mapping rules, and the project integration method. 1. When an existing host computer, edge gateway, or platform performs protocol parsing, the router can provide stable cellular backhaul and local network access. 2. When multi-device acquisition, offline caching, edge logic, and large-scale protocol adaptation are required, prioritize evaluation of the TG series industrial gateways. 3. When explicit data mapping between BACnet and Modbus, or OPC UA and Modbus, is required, prioritize evaluation of the TC-100 protocol converter. 4. Before purchasing, provide the device protocol manual, point list, baud rate/parity settings, network topology, security requirements, and target-platform interface so that feasibility can be confirmed.

The official product pages provide “Request a Quote” and sales contact options, but do not publish a uniform standard warranty period, retail prices for all SKUs, or extended-warranty terms. Therefore, external publications should state that details are “subject to the written sales quotation, order, and contract,” and should avoid presenting an unpublished one-year warranty or 2–5-year extended warranty as an established commitment. 1. Warranty and extended warranty: It is recommended to provide sales with the model, quantity, deployment country, project environment, service-response requirements, and spare-parts requirements, and request written quotations for the standard warranty, 2–5-year extended warranty, or project services. 2. Pricing and samples: Small-quantity samples can be viewed through the Tespro Online Shop; bulk purchases, OEM/ODM, specific frequency bands, custom protocols, or project packages should be formally quoted by sales. 3. Contact sales: The sales quotation email is sales@tespro.com; the general inquiry email is info@tespro.com. The official website lists telephone/WhatsApp numbers +852 4609 4648 and +1-213 610 4797. 4. Learn more: Products, cases, and demonstrations can be viewed through Tespro’s official Facebook, LinkedIn, YouTube, TikTok, X, and Instagram accounts. The official datasheet and written response should be treated as the final technical reference. 5. Inquiry recommendation: Including the model, country/carrier, quantity, network bands, SIM plan, interfaces, protocols, temperature/humidity and enclosure requirements, lightning protection, certification, lead time, and after-sales requirements in the email can significantly improve product-selection and quotation efficiency.