Lucent Technologies AT&T 7400B - Manual (Page 21)

CHAPTER 2: INSTALLATION
DEFINITY Communications System
7400B Data Module
Page 2-10
User’s Guide
Caution: Disconnect all cables and telephone cords attached at the
rear of the unit. Failure to disconnect all cables and
1.
b.
2.
3.
4.
5.
6.
cords at this point could result in permanent damage to
the 7400B Data Module.
Remove the top access panel of the data module as follows:
a . While applying a gentle lifting pressure at the rear edge of
the access panel, insert the tip of a ball-point pen or other
suitable device into each of the two tab-lock holes in the
rear panel to release the locking tabs.
Lift and remove the access panel.
If a ROM board is installed just inside the access opening of the
Data Module, grasp the edges of the ROM board inside the access
opening and lift the board out of its socket.
Locate the 8-position DIP switch on the main circuit board,
approximately in the center of the area exposed by the access
opening.
Set the appropriate positions of this DIP switch as shown in the
Table 2-1.
If a ROM board was removed in step 2, reinsert the board into its
connector.
Replace the access panel by placing it into position and pressing
down at the rear edge to engage the locking tabs.
Connecting the EIA-232-D
Connect the EIA-232-D cable between the Data Module and the
Cable terminal device as follows:
1 . Insert a male connector of the EIA-232-D cable into the connector
labeled PORT 1 on the rear panel of the Data Module. Tighten
both connector retaining screws.
2 . Insert the other end of the EIA-232-D cable into the
communications port connector on the terminal device. Tighten
all retaining screws.
Note: Be sure to attach any required adapter as discussed
previously in the paragraphs titled "Selecting the
EIA-232-D Cable."