Two-Wire versus Four-Wire Equipment

Telecom Environment

Two-Wire versus Four-Wire Equipment

In real telecommunication networks, some equipment uses the same wiring to transmit and receive information while other equipment might require separate wiring for transmitting and receiving data. This distinction is commonly referred to as two-wire versus four-wire equipment. An ordinary telephone set is an example of a two-wire piece of equipment whereas a lightwave carrier system is a four-wire facility.

These distinctions are carried through in the netWorks application. Two types of arcs are provided to accommodate bidirectional and unidirectional traffic between equipment models. And while it is the your responsibility to provide the right type of arc between models, in some cases netWorks will try to help you make the right choice. The wrong type of arc between equipment models will affect the path generation process discussed in the "Paths" section.

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