Nortel DMS-100 Series Replacement Procedures page 696

1-664 XPM card replacement procedures
NT3X83
in an RSC RMM
297-8021-547 Standard 14.02 May 2001
(continued)
a Locate the card to be removed on the appropriate shelf.
b Open the locking levers on the card to be replaced and gently pull the
card towards you until it clears the shelf.
c Ensure the replacement card has the same PEC, including suffix, as the
card you just removed.