IBM 3708 Description page 277

8100 Restrictions/Considerations when Attaching to the 3708
Restrictions
Considerations
Note that all of these restrictions/considerations apply when 3708 terminals are
defined to DPPX as LU type 2 (3278) devices.
1. When logging onto a DPPX application, error messages that are displayed on
the SSCP session is truncated to one line. For example, these error messages
occur when a logon command is keyed incorrectly by the user.
2. In the 3708, the Attention key sequence is only recognized when the application
the user has selected is not sending data to the terminal. The user must
therefore wait for either the application to finish sending or for the screen to
become full.
When logged on to the DPPX Router, the CLEAR (0,0) option of the
CONTROL.DPS command should not be used, because the time to clear the
screen is set to O. There is no window of time for the user to enter the Attention
sequence.
3. When logged onto the DPPX Router, the router selection menu is not updated
while the user is entering a command. The user must press ENTER after keying
in the command in order for the screen to be updated by the router. The
Type-ahead mode of the 3708 does not alter this situation.
4. When used for standalone operations, the 8100 does not support RTM data or
3708 alerts. Alerts are, however, be logged in the 8100 error log.
1. The logon screens and/or read prompts that can be displayed by the 3708 after a
terminal is UNBOUND by DPPX are displayed at the position that the cursor
was left in after the last output from DPPX. This may result in the last output
from DPPX being overwritten by the 3708. This may happen in any of the
following scenarios:
• When a logon command fails and the message displayed is from the DPPX
application (on the LU session, not the SSCP session)
• When a COPY.DATA command is entered by another user and the
TARGET is an LU type 2 terminal attached to the 3708
• When the DPPX Administrator performs a VERIFY. TERMINAL with
WRITE to the LU type 2 terminal attached to the 3708
• When the user of the Application Productivity Facility (APF) switches
session (the user should ignore the 3708 prompts and wait for APF to BIND
the terminal to the switched to session).
The user of the 3708 can avoid these problems by configuring the 3708 for
Dynamic mode and suppressing both the logon screens and the 3708's read
prompt.
2. To use the environment switching feature of the APF, the 3708 must be
configured to not disconnect when it receives an UNBIND (01) from the
application. This is because, when the user switches environments, APF sends
down an UNBIND (01) followed by a BIND.
A-6
IBM 3708 Description