Email is no monitored. CL chat feature is ONLY way to communicate. -- Upgraded to POE and this has to go. All ports (10G & 2.5G) are working -- passive DAC as well as Optics work on SFP+ ports. Switch is in excellent shape, just pulled from rack. Bought it from Amazon last year. Two Noctua 40mm installed at back for cooler operation. Power cord and rack mounting ear included. -- * 2.5G Ports: The network switch has 24 x 2.5Gigabit Ethernet Ports, compliant IEEE802.3bz (2.5G) standard, support 10/100/1000M/2.5G adaptive. 6 x 10G SFP Port(compatible 1G/2.5G Module, not include SFP Module). 240Gbps backplane bandwidth, excellent data forwarding performance * Web L2+ Managed: Support IPv4/IPv6, ARP config; Static Routing, DHCP server/relay/snooping. Device/port status query and various L2 configurations: such as VLAN, QoS, security, multicast, LACP, MAC address table, port mirroring, diagnosis, etc. * Easy to Use: just plug in the power cord, connect the ethernet cable directly to the device, auto MDI/MDIX, auto-negotiation rate. With durable metal casing, stable operation * Easy to Maintain: Power and port led indicator light, clearly display the running status and port rate status, CLI/WEB interface to query the current configuration and operation status, installation and maintenance are very simple * Widely Used: desktop, 1U wall-mounting design, fanless noiseless operation, well-suited for various environments, such as home,office and business , widely used in building/enterprise/business/data/broadband/access and converge network. Amazon: https://www.amazon.com/dp/B0CCDD4CLC https://www.mokerlink.com/index.php?route=product/product&product_id=535