Chapter 4 Operating the Passport 8000 Series switch 87Installing and Maintaining the Passport 8000 Series Chassisb Pull the card out of the card receptacle.2 Locate the read-write protect switch on the edge opposite the arrow on thememory card (Figure 46).Figure 46 Memory card read-write protect switch3 Adjust the read-write protect switch.4 Reinsert the memory card into the card receptacle (see Figure 42 on page 84).a Position the card with the label facing to the left and the insert arrowpointing toward the card receptacle.b Insert the card into the card receptacle.c Gently push the card in until it fits snugly in place.Replacing an air filter (8010co chassis only)To maintain proper operation of the 8010co chassis, you must periodically replacethe air filter in the chassis. How often you need to replace the air filter depends onthe conditions of cleanliness at the installation site. Replacement air filters (partnumber 312194-A) are available from Nortel Networks. To order, contact theNortel Networks Technical Solutions Center.Caution: You must remove the card from the Passport 8000 Serieschassis before changing the read-write protection. Failure to remove thecard may result in improper write protection.VLK0002AProtectedUnprotectedInsertINSERT