HP J3126-69001 - AdvanceStack Switch 100 assembly - Has 17 RJ-45 connectors (16 10Base-T ports and one 100Base-T port), and one RS-232C connector (console port) - (J3126A) Retail
HP J3136-69001 - Replacement redundant power supply module assembly - Mounts on the rear of the AdvanceStack Switch 2000 Retail