March 2007
Beginner
526 pages
13h 53m
English
book
Introduction to the New Mainframe: z/VSE Basics
by Wolfgang Bosch, Hans Joachim Ebert, Helmut Hellner, G. M. (Jerry) Johnston, Wilhelm Mild, Ingolf Salm, Joerg Schmidbauer, Martin Walbruehl, Mike Ebbers
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58 Introduction to the New Mainframe: z/VSE Basics
2.7.3 Larger systems
Figure 2-11 shows the z/990, a larger mainframe. The z/990 is usually equipped
with more processors than a z/890. In an environment with more than one
mainframe, VTAM or TCP/IP of z/VSE can use a
channel-to-channel (CTC)
connection to communicate between those mainframes.
Figure 2-11 Moderately large mainframe configuration
Briefly, the devices in Figure 2-11 include:
An IBM 3745, which is a communications controller optimized for connection
to remote terminals and controllers, and LANs. A 3745 appears as a control
unit to the mainframe.
IBM 3490E tape drives, which, though ...
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