Visara 1199 TWA Mux - Manual (Page 9)

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Chapter 1: Introduction
707026-001
Chapter 1. Introduction
The Twisted-Pair Wiring Multiplexer (TWA) Multiplexer provides connectivity and data
concentration, via Unshielded Twisted Pair (UTP) wiring, for IBM 3270 compatible video
display terminals and printers. This Multiplexer allows connection of up to sixty-fourth
3270-type devices to a MTX Communications Servers through four 25-pair UTP cables
that meet the EIA/TIA 568 Specification for Catagory 3 or better UTP cable.
The 1199-T32/64 Multiplexer offers the following advantages:
· Fewer cables
· Fewer slots used in the Communications Server
· Fewer connections
· Improves reliability
1199-T32
The MTX 1199-T32 Multiplexer provides for the attachment of up to 32 devices via one
multiplexed output port from a MTX Communications Server. Each 1199-T32 Multiplexer
requires an associated MCC II board on the MTX Communications Server. The MCC II
Port 0 output on the server is connected to the 1199-T32 via coaxial cable. The MCC II
board must be configured for 32-port Multiplexer support.
Up to 32 devices may be attached to the 1199-T32. One coax connection enables two
groups of 16 ports. Each group of 16 ports uses an EIA/TIA-568, EIA/TIA TSB-36,
Category 3 or better, 25-pair UTP cable terminated at the 1199-T32 end with a 50-position
RJ-21X connector. The other cable end is typically terminated to a common telephone
wire punch-down block. Devices attaching via a 1199-T32 require a Balun or equivalent
circuit, such as an IBM DPC-T3 or ADC Kentrox 2000 or 3000 series adapters.