Maintenance (ONS 15454 only) The Maintenance tab allows you to view maintenance information for the CE-1000-4 (ONS 15454 only) and CE-100T-8, CE-MR-10 (ONS 15454 only) cards. The Maintenance tab contains the following subtabs: Path Trace Loopback or DS1/DS3/EC1 STS/VT Allocation (CE-100T-8) STS/VT Allocation AINS Soak