OS6400-24 chassis Gigabit Ethernet chassis in a 1U form factor with 20 RJ-45 ports individually configurable to 10/100/1000 BaseT, 4 combo ports configurable to be 10/100/1000 BaseT or 1000 BaseX, and two dedicated stacking ports. Combo ports support either copper or fiber can be used on a one for one basis. Ethernet optical transceivers (SFP), stacking cable, and backup power supplies can be ordered separately. Internal AC supply. The bundle includes country specific power cord, user manuals access card, rack mounts and RJ-45 to DB-9 adaptor.