Allied Telesis AT-FS708 - Manual (Page 18)

Chapter 1: Product Description
18
A port operating in full-duplex mode uses PAUSE frames, as specified in
the IEEE 802.3x standard, to stop the transmission of data from an end-
node. Whenever the switch wants an end-node to stop transmitting data, it
issues this frame. The frame instructs the end-node to cease transmission
for a period of time specified within the frame. The switch continues to
issue PAUSE frames until it is ready again to receive data from the end-
node. This is referred to as flow control.