AT&T 2.1.1 manual Configuration of Previously Installed Boards

Hardware Installation

Configuration of Previously Installed Boards

For boards which are already in use, examine the second bank of switches (SW12.1):

If the board has rocker switches, the configuration is A.

If the board has slide switches that are marked OPEN on the top or bottom (or on the side with an arrow toward the top or bottom), the configuration is B (top) or C (bottom) respectively.

If the board has unmarked slide switches, the setting of the second switch (SW12. 1 ) should correspond to one of the settings shown in Figure 2-28.Use the configuration letter at the top of the column in which the match is found.

If you are unable to determine the correct configuration by examining the switch settings, you will have to test the board as described later in this section to determine the correct configuration.

Mark the board with the corresponding configuration letter (A, B, or C) for reference in resetting the switches.

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