IEC 60512-99-001:2012 used for the assessment of connectors within the scope of SC 48B that are used in twisted pair communication cabling with remote power, such as ISO/IEC 11801 Class D, or better, balanced cabling in support of IEEE Std 802.3at - 2009 (latest edition (PoE Plus - Power over Ethernet Plus). The object of this standard is to detail a test schedule to determine the ability of connectors to withstand a minimal number of engagements and separations when an electrical current is being passed through the connector in accordance with IEC 60512-9-3.Keywords: connectors, engaging and separating connectors