Antaira LMP-1204G-SFP-bt-24-T 12-Port Gigabit Managed PoE++ Switch with 8x PoE++, 4x SFP, 12-55V DC Input and Extended Temperature

Roadside and pole-top enclosures on ITS and surveillance networks often combine two awkward conditions: no heating and no 48 V supply. The LMP-1204G-SFP-bt-24-T is the low-voltage, extended temperature model in the Antaira LMP-1204G-SFP-bt series, a 12-port Light Layer 3 managed industrial switch that runs on 12 to 55 V DC from -40 °C to 75 °C while still feeding 802.3bt devices.

Four 10/100/1000 RJ45 ports deliver IEEE 802.3bt PoE++ at up to 90 W per port, four more deliver IEEE 802.3at/af at up to 30 W, and four 100/1000 dual-rate SFP slots take single-mode or multi-mode fibre modules. Antaira quotes a 240 W PoE budget for the -24 models; its sheet for the related LMP-1204G-SFP-bt-24-T-BOS rates that figure at 36 to 55 V DC, with 90 W at 12 V and 180 W at 24 V, so the supply voltage sets how much PoE is available.

Persistent PoE, PoE alive check, output scheduling and budget protection keep powered devices under control. Static routes, ARP, NAT and DHCP Option 82 sit alongside VLAN, QoS, IGMP and LACP, ITU-T G.8032 ERPS restores the ring in under 50 ms, and RADIUS, TACACS+, 802.1X and ACLs secure access. The redundant inputs have overload current and reverse polarity protection, with a 24 V DC, 1 A relay contact for alarms.

The LMP-1204G-SFP-bt-24-T runs fanless in an IP30 metal case for DIN-rail or wall mounting, with a Telcordia MTBF of 332,002 hours. Antaira lists FCC, CE, UL 61010-1 and UL Class 1 Division 2 approvals, states NDAA and TAA compliance and adds its 5-year warranty. The LMP-1204G-SFP-bt-24 is the -10 °C to 65 °C model and the LMP-1204G-SFP-bt-T the 48 V model at this rating. We supply and specify the switch, and pre-configure IP addressing, VLANs and ring settings where you ask.