Ibm 3270 Personal Computer Compatibility With The 3274; 3290 Compatibility With The Host - IBM 3270 Manual

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• Entry Assist
• 4250 Printer Attachment
• Alert function
• Response time monitor (RTM).
Encrypt/Decrypt Feature (3274 Models lC, 21C, 31C, and 51C)
It is the customer's responsibility to install a copy of the secondary logical
µnit (LU) key (the terminal master key) in the 3274 Control Unit equipped
with Encrypt/Decrypt (feature 3680). This should be done by someone in a
position of trust, such as a security officer. Once the terminal master key
has been installed in the 3274, the 3274 generates a verification pattern
based on the terminal master key. A master-key verification procedure can
be performed by any operator without compromising the security of the
Encrypt/Decrypt feature. A mercury battery, IBM Part 1743456, is installed
in the 3274 to sustain the terminal master key when the 3274 power is off.
Replacing this battery, or its equivalent, is also a customer responsibility.
Procedures to install and verify the terminal master key, and to replace the
mercury battery, are described in IBM 3270 Information Display System
3274 Operator's Reference and 3274/3270 Problem Determination Guide,
GA27-2850.
Refer also to IBM Cryptographic Subsystem Concepts and Facilities,
GA22-9063, for background information, and to IBM 3270 Information
Display System: 3274 Control Unit Description and Programmer's Guide,
GA23-0061, for programming information.
IBM 3270 Personal Computer Compatibility with the 3274
If any IBM 3270 Personal Computers are included in the subsystem, obtain
a copy of the Information Worksheet that is used for customizing the IBM
Personal Computer system diskette. Make sure that the information on
this worksheet agrees with the responses given to the sequence numbers
during 327 4 customizing. Refer to IBM 3270 Personal Computer
Introduction and Preinstallation Planning, GA23-0179, for more information.
3290 Compatibility with the Host
If any 3290 Information Panels are included in the subsystem, check
whether setup .level 3 changes are required to make the 3290s compatible
with their definition at the host. If so, after customizing is completed and
an initial microcode load (IML) of the system has been performed, it may be
necessary to set the control unit offline before switching on the 3290.
Otherwise, errors may occur when the host tries to communicate with the
3290.
Chapter 1. Planning Your Installation
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