AT&T MERLIN LEGEND Installation & Maintenance Manual page 170

Installation
Stand-Alone Asynchronous DTE Configuration. Follow the
steps below to configure the ISDN 7500B Data Module to work
with a modem in a modem pool:
1. Remove the 7500B from the box.
2.
Open the door panel on the 7500B.
a. Insert a pen into the small hole near the LINE label on the
back panel.
b. Push in on the tab in the hole while you pull upon that side
of the door.
c. Repeat steps a and b for the other side of the door panel
by sticking your pen into the small hole near the PORT 2
label.
d. Lift off the door and set it aside.
3. Looking straight down at the inside of the 7500B, locate the
large silver arrow pointing toward the back.
This arrow points to the DCE/DTE flip board, which is
perpendicular to the plane of the arrow.
4. Look at the DCE/DTE flip board from the front of the 7500B
(see Figure 33).
Either DTE or DCE will be in the left-hand corner of the board.
5. Adjust the flip board as needed.
If DTE is in the left-hand corner of the board, the 7500B is
already configured for DTE; go to step 6.
If DCE is in the left-hand corner of the board:
a. Grasp the flip board firmly with both hands.
b. Pull up gently until the board is completely free.
c. Turn the board around 180 degrees (DTE is in the left-
hand corner.)
d. Replace the board in its slot.
3-62 Data Adapters