Introduction; General Description - Black Box 3174/3274 I-Mux Series Manual

2.1 General Description

The 3174/3274 I-Muxes are 19-inch rack -
mountable units designed for used with IBM
3174 and IBM 3274 32-port cluster controllers.
The Controller Side Mux accepts up to four IBM
3174 or 3274 RPQ coaxial lines, each carrying an
eight-to-one multiplexed signal. This Mux provides
a single multiplexed output on fiberoptic, coax, or
twisted-pair cable. That output can be recovered for
a total of up to 32 terminal signals. Figure 2-1 shows
the Controller Side Mux (MX330A-C).

2. Introduction

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Figure 2-1. Controller Side Mux (MX330A-C).
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Figure 2-2. Device Side Mux (MX330A-D).
The Device Side Mux works in conjunction with the
Controller Side Mux. It receives a single multiplexed
output on fiberoptic, coax, or twisted-pair cable and
provides one-to-four demultiplexing to recover up
to four IBM 3174 or 3274 multiplexed lines carrying
a total of up to 32 terminal signals. Figure 2-2 shows
the Device Side Mux.
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CHAPTER 2: Introduction
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