AT&T ISDN 8510T Instructions Manual page 7

Changing the EPROM Board
The EPROM board is located near the top center of the base of the voice
terminal. See Figure 3 for the location of this board. Use the following
directions to remove the present EPROM board and install the new one.
To remove the old EPROM, take the EPROM board between your
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thumb and forefinger and pull up on the board.
To install the new EPROM board:
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Orient the new EPROM board, as shown in Figure 3, with the
48-pin connector facing down.
Line up the 48-pin connector on the new EPROM board with the
48-pin connector on the bottom of the voice terminal.
Slowly lower the new EPROM board until the two 48-pin
connectors fit together.
Gently push down on the EPROM board until it is secure and
snaps in place.
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