to remove an sfp module from a module receptacle, follow these steps:
step 1 attach an esd-preventive wrist strap to your wrist and to a bare metal surface on the chassis.
step 2 disconnect the cable from the sfp module.
for reattachment, note which cable connector plug is send (tx) and which is receive (rx).
step 3 for fiber-optic sfp modules, insert a dust plug into the optical ports of the sfp module to keep the optical interfaces clean.
step 4 unlock and remove the sfp module, as shown in figure 3-39.
if the module has a bale-clasp latch, pull the bale out and down to eject the module. if the bale-clasp latch is obstructed and you cannot use your index finger to open it, use a small, flat-blade screwdriver or other long, narrow instrument to open the bale-clasp latch.

step 5 grasp the sfp module between your thumb and index finger, and carefully remove it from the module slot.
step 6 place the removed sfp module in an antistatic bag or other protective environment.