Avaya 6424D+M User Manual page 21

1-5
OVERVIEW: SYSTEM 85 AND DEFINITY GENERIC 2 WITH TRADITIONAL MODULES
made from the network interface to the green field of the MDF.
A cross-connection is made from the green field to the trunk section of the purple field. From the
purple field, the path travels along a 25-pair cable to the backplane of a trunk port circuit at the switch.
The switch establishes a talking path between the trunk port circuit and the line port circuit for the
desired workstation. The path exits the switch from the line port circuit and proceeds along a cable
from the backplane to the section of the purple field for lines on the MDF. The purple field is cross-
connected to the white field, the distribution field of the MDF.
The path leaves the white field via a distribution cable that connects to the white field of the IDF. The
circuits on the white field of the IDF are cross-connected to the appropriate circuits on the blue field.
From the blue field, a 4-pair, twisted wire runs to the IO at the workstation. The voice terminal plugs
into the IO.