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CHAPTER 3: Configuration
Installing the X.21 Daughterboard onto the X.21 Line Driver Card
Figure 3-24 shows the X.21 daughterboard, DCE/DTE selector, and jumper (JP1)
location with respect to the rack card. Following Figure 3-24 are guidelines for the
installation of the X.21 daughterboard, setting for DCE/DTE, and a brief
description of Jumper JP1.
Figure 3-24. View of the X.21 daughterboard, DCE/DTE selector, and JP1.
Follow the steps below for proper installation of the X.21 daughterboard.
WARNING
The X.21 daughterboard connector is not keyed and can be installed
incorrectly.
1. On the top side of the X.21 daughterboard, locate the designator shown
below:
Front X.21
2. Install the X.21 daughterboard onto the front card with the “Front X.21”
arrow pointing to the front panel of the rack card (see Figure 3-24).
X.21 Daughterboard
DCE/DTE
selector
Front
panel
Rear
Rack Card
Front X.21
JP1