Specifies whether or not an SNA Change Direction data stream will be sent if a short data stream is received in response to a IBM Session Manager 3270 Read Buffer command.
This common end-user parameter is applicable to these control statements: SYSTEM (see SYSTEM statement), PROFILE (see PROFILE statement), USER (see USER statement), and TERMINAL (see TERMINAL statement).
This parameter may be applied when using SNA 3270 LU2 protocols, but not LU0 protocols although it is benign. If a short data stream is received, a race condition may occur when connecting to IBM Session Manager using components that emulate SNA terminals, such as TN3270 servers or other session managers.
This parameter allows the 'terminal' to be given session direction, enabling it to send the Read Buffer reply correctly.
Note: IBM Communication Server TN3270 generally only operates as an LU2 when using TN3270E protocols. If standard TN3270 protocols are used, an LU0 session is initiated.