ZyXEL ES-1528. Switch type: Managed. Basic switching RJ-45 Ethernet ports quantity: 28, 26, 28, Copper ethernet cabling technology: 1000Base-T, 100Base-TX, 10Base-T. MAC address table: 8000 entries, Switching capacity: 12.8 Gbit/s, Maximum data transfer rate: 1 Gbit/s. Management protocols: SNMP v1, v2. Certification: UL 60950-1 CSA 60950-1 EN 60950-1 IEC 60950-1