Internetworking Terms: Two-Way Simultaneous (TWS)
From DocWiki
Two-Way Simultaneous (TWS)
Definition
Mode that allows a router configured as a primary synchronous data link control (SDLC) station to achieve better utilization of a full-duplex serial line. When TWS is enabled in a multidrop environment, the router can poll a secondary station and receive data from that station while it sends data to or receives data from a different secondary station on the same serial line.