A OAM loopback request entry. Each entry in the table is uniquely identified by ifIndex, VPI and VCI. To start a test, use NMS to create the associated instance of the row status and row owner objects. Also use NMS to modify the default values for the other configuration objects if the defaults are not appropriate. Once you have used NMS to create the appropriate instance of all of the configuration objects, either by an explicit SNMP set request or by default, use NMS to set the row status to active to initiate the request. Note that this entire procedure can be initiated using a single set request that specifies a row status of createAndGo as well as the valid values for the non-defaulted configuration objects. once the OAM test sequence has been activated, it can be aborted by setting RowStatus from active to notInService. Once the test sequence completes, the NMS should retrieve the values of the status objects of interest and then delete the entry. To prevent old entries from clogging the table, whenever a new OAM loopback test is requested on a VPI VCI, the old VPI VCI entry is deleted and the entries marked expired are also deleted.