OS6250-24M Fast Ethernet chassis with AOS Metro software. Provides 24 RJ-45 10/100 BaseT. 2 SFP/RJ45 10/100/1000 BaseT or 100/1000 BaseX combo and 2 SFP Gigabit uplinks/2.5G stacking ports. 1U by 1/2 rack form factor. Internal DC and optional external backup power supply. Includes manuals/software access cards. RJ-45 to DB-9 adaptors and brackets to rack mount with another OS6250. Optional single unit 19″” mounting kit: OS6250-RM-19-L or OS6250-RM-19