3270 - Access to Mainframe Computing Part 1


Access to campus computer networks is exclusively for the use of University of Wisconsin students, faculty and staff. You are responsible for your login and password; do not let others use them. Violation of this policy could lead to serious disciplinary actions.

Mainframe Client:

You will need to use a program (generally called a client) to access DoIT's 3270 mainframe. Download links and configuration instructions for the supported clients can be found here.

What can 3270 teleprocessing do for you?

Teleprocessing helps you maintain, retrieve and display information stored on the University's administrative mainframe computer. For example, authorized users have access to data on students, payrolls, budgets, libraries, requisitions and parking fines. Teleprocessing makes it possible to obtain this information rapidly.

Different teleprocessing transactions enable you to perform different types of inquiries and updates to administrative data. Hundreds of transaction exist but that number is dropping as systems are being developed and the functions are being moved off the mainframe. The general categories of applications still on the mainframe include payroll and human resources (IADS). Additionally, there are residual accounting, grants and other applications.

Teleprocessing concepts and components

With teleprocessing, you send and receive messages (e.g., commands or data) to and from the computer using some sort of terminal. This done interactively; that is, you send a message, the computer responds, you send another message and so on until you exit from the transaction and sign off from the computer.

The connection: terminal, software systems

Historically, there have been many different ways to connect to DoIT's mainframe for 3270 teleprocessing. Today, most users connect to the mainframe using a client installed on their computer which can be configured to connect to the mainframe.

First, connect to the mainframe

If you're using a client to connect to the mainframe, you should have configured the program according to directions available here. Once correctly configured, you should open that client and connect

Next, logon

You must then login to the 3270 mainframe, in order to access the system. This involves following the instructions on a series of menu screens that display after you have connected to the mainframe. The logon process is further explained later in this tutorial in QWS3270 - Access to Mainframe Computing Part 3.

From these screens, you can select an application to use. To get to most teleprocessing transactions, select IMSVS.

Signing onto IMSVS

Once you are logged in to 3270, you can sign in to IMSVS which is where many of the transactions you may use will be located. Before you sign on, make sure you are authorized to use the IMSVS transactions you will need. More details on authorization can be found later in this document.

Entering an IMS transaction

Each IMSVS (or "IMS") transaction should have its own user guide, manual or reference card giving specific instructions for using that transaction. The following general instructions apply in most cases.

In IMS, the cursor will usually be at the top of the screen. Gain access to most TP transactions like this:

Type:    transaction name (space) KEY
Example: DNAM (space) SMYTHE,J
Press: ENTER

A transaction name is a one to eight character alphanumeric code representing the name of the transaction. It must be followed by a space or line-feed. The "key" is a text message or parameter of one or several lines. It might be a name, a number or an ID for the record you want to view. Some transactions will not require a key/parameter.

In the example above, DNAM is the transaction code (followed by a space) and SMYTHE,J is the name you want to see. (The DNAM transaction requires the comma.)

Selecting useful transactions

Your dean, director or supervisor can help you decide which transactions you need. Then fill out a Teleprocessing Network Authorization Form to list the transaction you want.

Note that some transactions include the message "UDDS authorization required." UDDS is a letter/number code that identifies Unit - Division - Department - Subdepartment within the UW administrative structure. (Unit or campus, is the broadest level.)

UDDS authorization means that your use of a transaction will be restricted to the UDDS that relates to your work. You define the UDDS levels to which you need access on the TP Network Authorization Form.

A current list of transactions can be found in this Excel spreadsheet.

NOTE: The above list of transactions is numbered in column A. Those transactions from 761 to the end of the list are discontinued.

Continue to QWS3270 - Access to Mainframe Computing Part 2.

See Also:

Keywords:mainframe tn3270 computing qws3270 teleprocessing imsvs training tutorial transactions   Doc ID:691
Owner:Chris M.Group:DoIT Help Desk
Created:2000-10-25 19:00 CDTUpdated:2016-01-22 12:32 CDT
Sites:DoIT Help Desk
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