Description
Automatic detection of MDI / MDIX
All ports support auto-polarity MDI / MDIX. This eliminates the need for crossover cables or ports uplink. Any port can be connected to a server, hub, router, or switch using “direct» Ethernet-twisted-pair.
Flow Control
All ports support flow control 802.3x. This feature allows you to prevent the loss of packets by transmitting a signal of a possible buffer overflow. The suspension continues until the packet until the port is ready to receive new data. This provides a reliable connection of all connected devices.
Meet the spectacularly mobile ThinkPad X390—a 13.3-inch business laptop with a 12-inch footprint, enhanced security measures like PrivacyGuard, PrivacyAlert, and ThinkShutter, more than two workdays worth of battery life, dual far-field microphones, global LTE capability, and more. Your travel companion has arrived. 
The smallest in its class: With its sleek, small design, this is the first 3000 series laptop to qualify as an ultrabook according to IDC’s industry definition, making this system ideal for travel and daily use. 
Built-in High Gain Dual-Polarized Antenna Dedicated metal reflector ensures higher gain and lower noise interference 
