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Chapter 3. Operating in Line-by-Line and ASCII Pass-through
Modes
This section describes line-by-line and ASCII pass-through modes and defines the
break sequence for each.
Line-by-Line Mode
Line-by-line mode means that you send only one line of data to the host at a time.
After you receive a read prompt (for example, the command ENTER DATA), you
can type a line of data. To send the data to the host, press one of the line
turnaround characters that is defined for your system. Typical line turnaround
characters are carriage return (CR) and line feed (LF).
If
you do not know which
key to press, see your system administrator.
To interrupt data coming from the host, or signal the host for a specific application,
use the BREAK key. The BREAK key can operate in one of the following ways:
• The signal may cause the host to stop sending data to the terminal.
• It may cause the host to send a new line of data.
• It
may cause the host to clear the line of data that you have on the current line.
See your system administrator to find out how the break key works for your system.
To communicate with the system services control point (SSCP) session, type the
system request simulation string followed by an SSCP message (the default is 99999;
see your system administrator
if
you need help). The SSCP message can be up to
251 bytes long and must end with a defined line turnaround character. The 3708
transmits the message to the SSCP and returns you to your application.
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Operational Note: If you enter the system request simulation string followed bya line turn around character,
VT AM issues a USS message 2 (Command Unrecognized) and return you to your application.
!
Chapter 3. Operating in Line-by-Line and ASCII Pass-through Modes
3-1
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