This object identifies the bit mask to control the line voltage behavior of the eMTA in various scenarios: maintenanceOnCmReset(0) - if this bit is set to 1 it requires the line voltage be maintained in the case when the CM has been reset, regardless of the reason (reset after downloading a new firmware, or hard reboot, or SNMP induced CM reset), and regardless of whether the MTA is in a valid maintenance window maintenanceOnRFLoss(1) - if this bit is set to 1 it requires the line voltage be maintained in the case when RF communication is lost, regardless of the reason, and regardless of whether the MTA is in a valid maintenance window maintenanceOnMtaReset(2) - if this bit is set to 1 it requires the line voltage be maintained in the case when the eMTA is being reset, regardless of the reason (e.g. SNMP induced eMTA reset, etc), and regardless of whether the MTA is in a valid maintenance window maintenanceOnCMSLoss(3) - if this bit is set to 1 it requires the line voltage be maintained in the case when communication is lost with the CMS, regardless of the reason (e.g. endpoint disconnected, etc), and regardless of whether the duration of the communication loss has exceeded the value in the MIB emtaMaintenanceQuarantineTimeout and/or emtaMaintenanceDisconnectedTimeout The default value of this object may change based on build specific options. However, it's highly recommended that the default value in the image submitted for (E)PC 1.x Certification be chosen in such a way that it will correspond to the functionality compliant with the PacketCable requirements and will preserve the backward compatibility with the previously certified behaviour. Note that to satisfy the latter, 'maintenanceOnCMSLoss(3)' bit should be set by default.