Note
Since the AT-FS708LE ports operate in Auto-Negotiate mode only, the end-nodes connected to the AT-FS708LE must also be configured to operate in the Auto- Negotiate mode. If an end-node is configured to a specific duplex in a manual mode, it will not respond to the Auto-Negotiate protocol from the AT-FS708LE. (The speed is determined from the link pulses, however, so the speed is always detected correctly.) As a result, the AT-FS708LE port setting will end up at half-duplex. If the end port is manually configured to full-duplex, there will be a duplex mismatch and data will be lost. If the end port is manual configured to half-duplex, both ports will have the speed and duplex match up correctly.
Auto MDI/MDI-X
An RJ-45 twisted pair port on a 10 Mbps or 100 Mbps Ethernet network device can have one of two possible wiring configurations: MDI or MDI-X. A RJ-45 port on a PC, router, or bridge is typically wired as MDI, while a twisted pair port on a switch or hubs is usually MDI-X.
