This object defines a Kerberos Key Management timer on the MTA. It is the time period during which the MTA saves the nonce and Server Kerberos Principal Identifier to match an AP Request and its associated AP Reply response from the Provisioning Server. After the timeout has been exceeded, the client discards this (nonce, Server Kerberos Principal Identifier) pair, after which it will no longer accept a matching AP Reply. This timer only applies when the Provisioning Server initiated key management for SNMPv3 (with a Wake Up message). This object should not be used in non secure provisioning modes. In non secure provisioning modes, the MTA MUST return an 'inconsistentValue' in response to SNMP SET operations, and the MTA MUST return a 'genErr' error in response to SNMP GET operations.