Try the following (quote from other D-link switch manuals) I have a DGSTGR switch that I bought second hand and had the same issue. Jump to D-Link - D-Link DES, 8 + 8 (PoE). D-Link D-Link DGSP, 8 (PoE) + 2 (combo). D-Link D-Link DESL, 24, 2. D-Link. Download D-Link DGST - Switch Manual (Total Pages: 58) for free in PDF. Find more compatible manuals for your D-Link DGST - Switch Switch device. D-link DESL Reference Manual. D-Link DESL Manual. D-Link.