Avaya 555-233-116 manual Data module mode selector

Set hardware options

To change the operating mode of the 7400A from DCE to DTE (or vice versa), you change the position of a small circuit board (the Electronic Industries Association connector board) inside the case. See Figure 11 and proceed as follows.

! WARNING:

Electrostatic discharge can severely damage sensitive electronic circuits. Before handling any electronic hardware, be sure to wear a grounding wrist strap or other static-dissipating device. Do not touch exposed circuitry or semiconductor chips.

1.Unplug the data module from the power receptacle.

2.Remove the access panel on the top of the case by grasping the rear lip of the panel and pulling sharply upward.

3.While facing the front of the data module, locate the small EIA connector circuit board. It sticks up vertically, and a large, silver arrow on the main circuit board points to it.

DTE

		HOME
		NEXT/NO BACK ENTER/YES
POWER TEST 7400A Data Module		DATA
		7400atop KLC 053096
1. 7400A data module	2. EIA connector board (shown in DTE mode)

Figure 11. Data module mode selector

4.Note the three letters engraved in the upper lefthand corner of the EIA connector board. Data modules ship from the factory with board inserted with “DCE” in the upper left corner.

555-233-116 Issue 4 October 2002 51