Full cellular routers are overkill for a meter or a controller: too much radio, too many ports, too much cost multiplied across a thousand endpoints. Teltonika's TRB247 is scoped to the actual job. LTE Cat 1 bis provides a power-efficient, single-antenna cellular link designed for the telemetry-class bandwidth machine traffic really uses, with broad network availability and module economics that make thousand-unit rollouts arithmetic rather than aspiration. The interface set targets industrial equipment squarely. One Gigabit Ethernet port connects an IP-capable device or local network segment. RS232 and RS485 bring the serial world aboard — meters, drives, PLCs, and legacy instruments — with gateway functions bridging serial protocols to IP for SCADA and cloud backhaul. Configurable I/O lines integrate contact-closure alarms and simple control, letting one palm-size unit replace a small stack of converters. Despite the compact scope, this is a true member of Teltonika's industrial family: RutOS-based firmware with firewall and VPN support secures the uplink, and Teltonika RMS provides the central console that makes massive fleets of small gateways operable — remote configuration, monitoring, and firmware across every deployed unit. Deploy the TRB247 for utility metering, machine OEM connectivity, cabinet telemetry, and distributed asset monitoring — anywhere the endpoint count is high, the bandwidth need is modest, and the interface list reads Ethernet, serial, and I/O.