Nortel DMS-100 Series Replacement Procedures page 309

c Verify that the replacement card has the same PEC, including suffix, as
the card you just removed.
16 Open the locking levers on the replacement card.
Align the card with the slots in the shelf and gently slide the card into the shelf.
17 Seat and lock the card.
Using your fingers or thumbs, push on the upper and lower edges of the
faceplate to ensure that the card is fully seated in the shelf.
Close the locking levers.
DMS-100 Family NA100 Card Replacement Procedures Volume 6 of 7 LET0015 and up
XPM card replacement procedures (continued)
NT8X18
in an SMS-R
(continued)
1-277