IBM 3708 Description page 279

• Device Address
The first 2 bytes of the device address (DEV ADR) parameter in the System/38's
device description definition defined for the 3708 must be equivalent to the value
defined for the SNA LU Device Number
+
2 defined for the device in the
3708's configuration. The next 2 bytes must be equivalent to the CTLADR and
the last 2 bytes must be equivalent to the LINNBR parameter defined in the
System/38.
• DEVTYPE=3277
If the device attached to the 3708 is a display, DEVTYPE must be defined as a
3277 in the System/38's device description definition. If the device attached to
the 3708 is a printer, DEVTYPE must be defined as a 3287.
• MODEL
MODEL must be defined as *NONE in the System/38's device description
definition.
System/38 Restrictions/Considerations when Attaching to the 3708
Restrictions
Considerations
The System/38 possesses the following restrictions when used in standalone mode:
• Protocol enveloping (LU type 1 NTO) is not supported.
• System printers are only supported as LU type 1 SCS.
• RTM data is not supported.
• Alerts are not supported.
• Unformatted session services are not supported. Logons to the System/38 are
accomplished by the normal System/38 signon screen. If unformatted data
arrives before the session is bound, the data is ignored by the System/38.
Ending the SNA session: When used in standalone mode, the System/38 does not
transmit an UNBIND command to the 3708 to end the 3708 session. Users cannot
disconnected from the System/38 without operator intervention. To get around this,
two System/38 control language programs can be created. The first program
(V ARYOFF) varies the device ofT then on. The second program (SIGNOFF)
submits a job to execute the V ARYOFF program and then performs a SIGNOFF
command.
From the display connected to the 3708, the user enters CALL SIGNOFF. The display
is then signed ofT while the V ARYOFF program is being loaded. The user sees the
System/38 signon screen for a second or two before being prompted by the 3708's
logon screens. At this point the user may then go through the normal 3708 logon
procedure to gain access to another host application.
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IBM 3708 Description