Lantronix SISPM1242-582-LRT 11-port managed PoE++ network switch

Managed PoE++ switch for hardened networks

The Lantronix SISPM1242-582-LRT is a managed switch built for hardened environments such as factory floors and outdoor enclosures. It provides eleven ports, including four 10/100/1000 RJ-45 ports and four 100M/1G/2.5G RJ-45 ports that deliver PoE++ power. Two 1G/10G SFP+ uplink slots handle high-speed aggregation. The switch operates at 13 W consumption while offering a 360 W PoE budget.

Installation and common issues

The unit mounts in industrial enclosures and is managed through CLI, SSH, SNMP or the included DMS web interface. DMS provides a graphical topology, floor map creator and traffic monitoring for simplified setup. PoE++ ports negotiate up to 90 W on four ports or 45 W on eight ports simultaneously; exceeding the 360 W total budget will disable power on lower-priority ports. Jumbo frames up to 9K bytes must be enabled consistently across connected devices.

Pre-order checks

Verify that your power source can sustain the 360 W PoE budget plus the 13 W switch consumption. Confirm that SFP+ transceivers match the 1G/10G dual-speed uplink requirement. Ensure cabling supports 2.5GBase-T on the multi-gigabit RJ-45 ports for full performance. The switch is TAA and NDAA compliant for regulated projects; buyers needing non-compliant or unmanaged alternatives should consider other options.