Communication Line Multiplexer
Original Publication Date: 1986-Sep-01
Included in the Prior Art Database: 2005-Mar-09
A communication line multiplexer card provides multiple communication interface ports which enable multiple devices to share a single communication facility, defined as a communication line and a supporting modem. Received signals are delivered to all interface ports in a multi- drop fashion, and transmitted signals are sequentially multiplexed onto the communication facility. Because all received signals are delivered to every interface port, each interface port must examine the address encoded in the header of a received message and discard messages addressed to other ports. For messages to be transmitted, the communication facility is sequentially made available to each port.