Only the S5720-28P-SI-AC, S5720-28X-SI-AC, S5720-28X-SI-DC, S5720-52P-SI-AC, S5720-52X-SI-DC, and S5720-52X-SI-AC in the S5720-SI series, and the S5735-S, S5735-S-I, S5735S-S, S5735-L, S5735S-L, S5735S-L-M, and S5720S-SI series switches support the sleep mode.
