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LOCAL FIBER MUX-6

2. Introduction

2.1 General

The Local Fiber Mux-6 is a full-duplex time-division asynchronous

multiplexor enabling up to twelve async terminals to be multiplexed onto a

single channel. The Local Fiber Mux-6 is intended for use in manufacturing

facilities, building complexes, campuses, and other similar point-to-point

applications.

2.2 Functional Description

The Local Fiber Mux-6 contains six sub-channels that can be expanded to

twelve through connection of channel doubler cables. The number of

channels available (6/12) is set by a user-selectable strap.

When the unit is set for six channels, each channel can be used to transmit

full-duplex data end-to-end. When the unit is set for twelve channels, each

sub-channel can be used for either data or control-signal transmission,

according to the specific application. For example: six channels can be used

to transmit full-duplex data and six can be used to transmit control signals

end-to-end, or else the full twelve channels can be used to transmit full-duplex

data end-to-end.

The main channel interface has a dual fiber for transmission over duplex

fiberoptic cable.

Multiplexing is implemented using an oversampling technique. Each of

the twelve channels is sampled at 157.2 kbps rate. Table 2-1 summarizes

Local Fiber Mux-6 performance with various options and modes of operation.

NOTE

Whenever possible (if the number of channels is less than or equal to 6)

we recommend that you operate the Local Fiber Mux-6 in the six-channel

mode, which results in less distortion.

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Black Box Local Mux-6 Spezifikationen Seite 10