Maintaining the ONS 15454 M12 (ANSI and ETSI),ONS 15454 M2 and ONS 15454 M6 ShelfThis chapter explains how to maintain the ONS 15454 (ANSI and ETSI), ONS 15454 M2 and ONS 15454M6 shelf installations.Unless otherwise specified, “ONS 15454” refers to both ANSI and ETSI M12 shelf assemblies.NoteDue to memory limitations, TCC2/TCC2P cards are not supported as the node controller in multi-shelfconfiguration from R10.5.2.6. Hence, it is recommended to use TCC3 card as the node controller in multi-shelfconfiguration. However, the TCC2/TCC2P cards can be used as a subtended controller and also in a stand-aloneconfiguration.Note• NTP-G114 Inspect and Replace the Air Filter, on page 1• NTP-G274 Replace the Air Filter of the ONS 15454 M2 Shelf Assembly, on page 5• NTP-G262 Replace the Air Filter of the ONS 15454 M6 Shelf Assembly, on page 7• NTP-G263 Replace the Air Filter of the AC Power Module in the ONS 15454 M6 Shelf Assembly, onpage 10• NTP-G115 Clean Fiber Connectors, on page 11• NTP-G40 Replace the Front Door , on page 14• NTP-G116 Replace the Fan-Tray Assembly of the ONS 15454 Shelf Assembly, on page 16• NTP-G272 Replace the Fan-Tray Assembly of the ONS 15454 M2 Shelf Assembly, on page 22• NTP-G260 Replace the Fan-Tray Assembly of the ONS 15454 M6 Shelf Assembly, on page 24• NTP-G117 Replace the ANSI Shelf Alarm Interface Panel, on page 26• NTP-G118 Replace the ANSI Shelf Plastic Lower Backplane Cover, on page 29• NTP-G795 Change System Mode Using LCD, on page 30NTP-G114 Inspect and Replace the Air FilterThis procedure ensures that the air filter is free from dirt and dust, which allowsoptimum air flow and prevents dirt and dust from entering the shelf.PurposeMaintaining the ONS 15454 M12 (ANSI and ETSI), ONS 15454 M2 and ONS 15454 M6 Shelf1