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Messages from the Terminal
When in SSCP mode, an operator can enter a message bound for the SSCP from the
character position occupied by the cursor. After entering data, the operator must
press the ENTER key sequence to send the data to the SSCP. Pressing other
program attention keys has no effect, except for the CLEAR key. Pressing the
CLEAR key sequence causes the display screen to be cleared, and the initial cursor
address is reset to the first position of the screen. Pressing program attention keys
other than ENTER or CLEAR causes the Input Inhibited Minus Function
(X
-F)
message to be displayed in the status line. Erase Input and Erase EOF keys operate
normally.
Data sent. to the SSCP are always only-in-chain and have a maximum length of 256
bytes. When ENTER is pressed, the 3708 sends the data (excluding nulls) contained
in the first 256 character positions including and following the initial cursor address,
or to the end of the screen, whichever comes first.
Chapter 3. SDLC and SNA Communication
3-51
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