ZyXEL GS-220048. Switch layer: L2, Switch type: Managed. Basic switching RJ-45 Ethernet ports quantity: 50, 44, 50, Copper ethernet cabling technology: 100Base-Tx, 10Base-T. Maximum data transfer rate: 1 Gbit/s. Certification: - UL 60950-1 - CSA 60950-1 - EN 60950-1 - IEC 60950-1 - EU RoHS. Packet buffer memory: 0.5 MB